NASA/TMm2000-209891, Vol. 197

Technical Report Series on the

Boreal Ecosystem-Atmosphere Study (BOREAS)

Forrest G. Hall and Karl Huemmrich, Editors

Volume 197

BOREAS TF-4 SSA-YJP Tower Flux,

Meteorological, and Canopy Condition

Data

Robert Striegl and Kimberly Wickland

U.S. Geological Survey, Denver

National Aeronautics and

Space Administration

Goddard Space Flight Center

Greenbelt, Maryland 20771

October 2000

https://ntrs.nasa.gov/search.jsp?R=20010022368 2018-05-14T18:56:45+00:00Z
The NASA STI Program Office ... in Profile

Since its founding, NASA has been dedicated to

the advancement of aeronautics and space

science. The NASA Scientific and Technical

Information (STI) Program Office plays a key

part in helping NASA maintain this important

role.

The NASA STI Program Office is operated by

Langley Research Center, the lead center for

NASA's scientific and technical information. The

NASA STI Program Office provides access to

the NASA STI Database, the largest collection of

aeronautical and space science STI in the world.

The Program Office is also NASA's institutional

mechanism for disseminating the results of its

research and development activities. These

results are published by NASA in the NASA STI

Report Series, which includes the following

report types:

• TECHNICAL PUBLICATION. Reports of

completed research or a major significant

phase of research that present the results of

NASA programs and include extensive data or

theoretical analysis. Includes compilations of

significant scientific and technical data and

information deemed to be of continuing

reference value. NASA's counterpart of

peer-reviewed formal professional papers but

has less stringent limitations on manuscript

length and extent of graphic presentations.

• TECHNICAL MEMORANDUM. Scientific

and technical findings that are preliminary or

of specialized interest, e.g., quick release

reports, working papers, and bibliographies

that contain minimal annotation. Does not

contain extensive analysis.

• CONTRACTOR REPORT. Scientific and

technical findings by NASA-sponsored

contractors and grantees.

CONFERENCE PUBLICATION. Collected

papers from scientific and technical

conferences, symposia, seminars, or other

meetings sponsored or cosponsored by NASA.

SPECIAL PUBLICATION. Scientific, technical, or historical information from NASA

programs, projects, and mission, often concerned with subjects having substantial public

interest.

TECHNICAL TRANSLATION.

English-language translations of foreign scientific and technical material pertinent to NASA's

mission.

Specialized services that complement the STI

Program Office's diverse offerings include creating custom thesauri, building customized databases, organizing and publishing research results...

even providing videos.

For more information about the NASA STI Prograin Office, see the following:

Access the NASA STI Program Home Page at

http://www, sti.nasa.gov/STI-homepage.html

E-mail your question via the Internet to

help@ sti.nasa.gov

Fax your question to the NASA Access Help

Desk at (301) 621-0134

• Telephone the NASA Access Help Desk at

(301) 621-0390

Write to:

NASA Access Help Desk

NASA Center for AeroSpace Information

7121 Standard Drive

Hanover, MD 21076-1320
NASA/TMm2000-209891, Vol. 197

Technical Report Series on the

Boreal Ecosystem-Atmosphere Study (BOREAS)

Forrest G. Hall and Karl Huemmrich, Editors

Volume 197

BOREAS TF-4 SSA-YJP Tower Flux,

Meteorological, and Canopy Condition

Data

Robert Striegl and Kimberly Wickland

U.S. Geological Survey, Denver

National Aeronautics and

Space Administration

Goddard Space Flight Center

Greenbelt, Maryland 20771

October 2000
NASACenterforAeroSpaceInformation

7121StandardDrive

Hanover,MD21076-1320

PriceCode:A17

Availablefrom:

NationalTechnicalInformationService

5285PortRoyalRoad

Springfield,VA22161

PriceCode:A10
BOREAS TF-4 SSA-YJP Tower Flux, Meteorological, and Canopy

Condition Data

Rob Striegl, Kimberly P. Wickland

Summary

The BOREAS TF-4 team collected energy, carbon dioxide, and water vapor flux data at the BOREAS

SSA-YJP site during the growing season of 1994. In addition, meteorological data were collected both

above and within the canopy. The data are available in tabular ASCII files.

Table of Contents

1) Data Set Overview

2) Investigator(s)

3) Theory of Measurements

4) Equipment

5) Data Acquisition Methods

6) Observations

7) Data Description

8) Data Organization

9) Data Manipulations

10) Errors

11) Notes

12) Application of the Data Set

13) Future Modifications and Plans

14) Software

15) Data Access

16) Output Products and Availability

17) References

18) Glossary of Terms

19) List of Acronyms

20) Document Information

1. Data Set Overview

1.1 Data Set Identification

BOREAS TF-04 SSA-YJP Tower Flux, Meteorological, and Canopy Condition Data

1.2 Data Set Introduction

Measurements of CO2 and latent and sensible heat flux were made both above and within the

BOReal Ecosystem-Atmosphere Study (BOREAS) Southern Study Area (SSA) Young Jack Pine

(YJP) canopy during a growing season. Combined with soil gas effluxes of CO2 and CH4, the data

were used to determine daily and seasonal patterns in carbon fluxes, evapotranspiration, and

environmental controls regulating the partitioning of available energy and net ecosystem productivity

(NEP). Comparisons were made between young and mature jack pine stands in proximity to one

another in terms of NEP and water use.

Page 1
1.3 Objective/Purpose

Theobjectivesof thisstudywereto investigatecarbon,water,andenergyfluxesin borealforests

throughanintegratedapproachinvolvingflux estimatesacrosstheatmosphere-forest and

soil-atmosphereboundaries.Eddycorrelationmeasurementsof CO2,latentandsensibleheatfluxes,

andmomentumweremadeabovetheSSA-YJPstand.Concentrationprofilesof CIq<,12CO2, and

13CO2 were determined within the canopy during one Intensive Field Campaign (IFC).

Soil-atmosphere flux studies employed soil depth vs. gas concentration measurements, flux chambers,

and diffusion modeling to determine source and movement of CH4, 12CO2, and 13CO2 in the

air-soil-water continuum. The distribution and storage of carbon species in the soil profile were also

determined. Long-term carbon accumulation was evaluated by 14C decay of soil carbon. Net,

incoming, and Photosynthetically Active Radiation (PAR); leaf photosynthesis; and certain soil

parameters (heat flux, thermal profile) were also measured at the site.

1.4 Summary of Parameters and Variables

Types of Data Collected:

• Above-canopy fluxes: CO2, latent heat, sensible heat

• Forest floor fluxes: CO2, sensible heat, latent heat

• Radiation: Net, PAR, and shortwave

• Profiles: CO2, air temperature, vapor pressure

• Tree: Tree bole temperatures

• Other Mean Variables:

• Above-canopy: Wind direction and speed, air temperature, vapor pressure

• Below-canopy: Wind speed, temperature, vapor pressure

1.5 Discussion

Flux data were collected from a 12-m tower in an 11- to 16-year-old jack pine stand. The trees

were about 4 to 5 meters tall. Flux and meteorological data were collected from mid-May through

mid-September 1994.

1.6 Related Data Sets

BOREAS TF-04 CO2 and CH4 Chamber Flux Data from the SSA

BOREAS TF-05 SSA-OJP Tower Flux, Meteorological, and Soil Temperature Data

BOREAS TF-10 NSA-YJP Tower Flux, Meteorological, and Porometry Data

BOREAS TF- 11 SSA Fen Tower Flux, Meteorological, and Soil Temperature Data

2. Investigator(s)

2.1 Investigator(s) Name and Title

Dr. Dean Anderson

United States Geological Survey

Dr. Rob Striegl, Hydrologist

USGS

Dr. Kimberly Wickland, Hydrologist

USGS

2.2 Title of Investigation

Exchange of Trace Gases, Water, and Energy in Disturbed and Undisturbed Boreal Forests

Page 2
2.3 Contact Information

Contact 1:

Dr. Rob Striegl

Hydrologist, USGS

P.O. Box 25046 MS 413

Denver, CO 80225

rstriegl@usgs.gov

Contact 2:

Dr. Kimberly P. Wickland

Hydrologist, USGS

P.O. Box 25046 MS 413

Denver, CO 80225

Contact 3:

K. Fred Huemmrich

University of Maryland

Code 923

NASA GSFC

Greenbelt, MD 20771

(301) 286-4862

(301) 286-0239 (fax)

Karl.Huemmrich@gsfc.nasa.gov

3. Theory of Measurements

The sonic anemometer/thermometer is designed to measure wind velocity components by transmitting

and receiving sonic signals along fixed orthogonal directions. The microcomputer electronics then

processes this information and calculates the wind speed in three axes. Since there are no moving parts

to come into dynamic equilibrium with the air flow, the sonic anemometer/thermometer responds

rapidly to wind velocity fluctuations. It responds linearly to wind velocity and is free from

contamination from pressure, temperature, and relative humidity. The calibration of the sensor is

established by its design parameters and therefore can be used as an absolute instrument. The probe

array is designed to minimize flow distortion created by the supporting base and to permit a very wide

unobstructed coverage of the vertical component.

4. Equipment

4.1 Sensor/Instrument Description

4.1.1 Collection Environment

Measurements were collected from mid-May through mid-September 1994 in an 1 l- to 16-year-old

jack pine stand. Over that time period, temperature conditions went from slightly below freezing up to

29 °C.

4.1.2 Source/Platform

Instruments were mounted on a 12-m-tall Rohn tower.

Page 3
4.1.3 Source/Platform Mission Objectives

The purpose of the tower was to suspend instruments to measure trace gas, energy fluxes, and

meteorological variables above a young jack pine stand.

4.1.4 Key Variables

Sensible and latent heat fluxes were measured both above and below the tree canopies. CO2 flux

and concentration were measured above the canopy. Measurements of radiation included net radiation,

PAR, and shortwave radiation. Meteorological measurements included wind speed and direction,

friction velocity, air temperature, vapor pressure, air pressure, and rainfall. Under the canopy, data on

air temperature, vapor pressure, and wind speed were collected. Bole temperature and leaf wetness

data were collected. Within the canopy, air temperature, vapor pressure, and air pressure were

measured.

4.1.5 Principles of Operation

Heat, water, and CO2 fluxes were measured using eddy correlation techniques. Meteorological

measurements were collected using standard instruments and methods.

4.1.6 Sensor/Instrument Measurement Geometry

The placement of instruments on the tower was at the following heights above the ground:

• Solar Radiation, LI-COR LI200S, at 12.9 m.

• PAR sensor, LI-COR LI190SZ, at 12.9 m.

• Air temperature and vapor pressure, Campbell Scientific, Inc., HMP35C, at 1.1, 9.1, and

12.2 m. Used an unaspirated, white plastic 12-plate Gill radiation shield, Campbell Scientific,

Inc., model 41002.

• Wind speed and direction, R.M. Young 03001-5, at 1.1, 10.0, and 11.0 m.

• Net Radiation at 9.1 m.

• Sonic anemometer, both Applied Technologies, Inc. (ATI), and Campbell, at 1.1 and 9.1 m.

• LI-COR CO2 sensor at 9.1 m.

• National Center for Atmospheric Research (NCAR)/Atmospheric Technology Division (ATD)

CO2 sensor at 1.1 m.

Bole temperatures were measured in two trees. In each tree, thermocouples were inserted into the

north, east, south, and west sides of the bole, to approximately one half the radius of the trunk, at four

heights. The first tree was 4.6 m tall; about average for the canopy. For that tree, the four heights were

0.58 m, 1.73 m, 2.79 m, and 3.68 m; the corresponding trunk diameters at those heights were 5.7 cm,

5.1 cm, 3.8 cm, and 2.9 cm. The second tree was about 3.6 m tall. The four heights were 0.46 m,

1.35 m, 2.24 m, and 2.74 m; the corresponding diameters were 3.3 cm, 2.9 cm, 2.2 cm, and 1.1 cm.

Within-canopy air temperature and vapor pressure were measured with the Campbell Scientific,

Inc., HMP35C, at 1.2 m above ground level. An unaspirated, white plastic 12-plate Gill radiation

shield (Campbell Scientific, Inc., model 41002) was also used. Within-canopy atmospheric pressure

was measured using the Setra 270, at 1.7 m

Leaf wetness sensors (Campbell Scientific, Inc., 237) were placed at heights of 1.6 m and 1.4 m.

The first leaf wetness sensor was deployed in a small opening in the trees, sloping about 40 ° to the

northeast. The second sensor was placed about 10 cm from a tree trunk, sloping about 40 ° to the west.

Rainfall was measured using a tipping bucket rain gauge (Weathertronics 6010) in a clearing

approximately 10 m in diameter at 0.6 m height. The 45°-angle cone above the rain gauge may have

been slightly encroached upon by treetops as the average tree height was about 4.6 m.

Page 4
4.1.7 Manufacturer of Sensor/Instrument

Sonicanemometer:

Applied Technologies,Inc.

1120DelawareAve.

Longmont,C) 80501

(303)684-8722

(303)684-8773(fax)

sales@apptech.com

Sonicanemometer,CO2 sensor:

NCAR/ATD

P.O. Box 3000, 1850 Table Mesa Drive

Boulder, CO 80307 USA

(303) 497-8833

(303) 497-8770 (fax)

atd_info@ atd.ucar.edu

Sonic anemometer, temperature/humidity sensor HMP35C, Campbell 21X data logger, Gill radiation

shield model 41002, leaf wetness sensor model 237, AM416 multiplexer, AM-ENCT insulating

enclosure, CO2 sensor:

Campbell Scientific, Inc.

815 West 1800 North

Logan, UT 84321-1784

(435) 753-2342

(435) 750-9540 (fax)

info@campbellsci.com

LI-COR LI200S, LI190SZN, CO2 sensor:

LI-COR Environmental Division

4421 Superior Street

Lincoln, NE 68504

(800) 447-3576

(402) 467-3576

(402) 467-2819 (fax)

Wind direction and speed 03001-5:

R.M. Young Company

2801 Aero Park Drive

Traverse City, MI 49686

(616) 946-3980

(616) 946-4772 (fax)

met. sales@ youngusa.com

Rain Gauge Weathertronics 6010:

WeatherMeasure Weathertronics

Qualimetrics, Inc.

1165 National Drive

Sacramento, CA 95834

(916) 928-1000

(916) 928-1165 (fax)

4.2 Calibration

None.

Page 5
4.2.1 Specifications

Twoproblemsremain,to onedegreeoranother,with all existingsonicanemometers:distortionof

themeasuredflow fieldby theanemometerarrayitselfandreliabledetectionof thetransmittedsound

pulsesby theanemometerelectronicsoverawiderangeof environmentalconditions.

4.2.1.1 Tolerance

None.

4.2.2 Frequency of Calibration

None.

4.2.3 Other Calibration Information

None.

5. Data Acquisition Methods

The tower meteorological data were collected using a Campbell 21X data logger. All sensors except the

rain gauge were located on the flux tower. Sensors were scanned every 5 s, and half-hour averages

were recorded. Vapor pressure was calculated as the product of saturated vapor pressure at air

temperature and relative humidity (100% = 1). Saturated vapor pressure was calculated using the Lowe

(1977) equation. The tipping bucket rain gauge (one tip = 0.25 mm of rain) was deployed in a clearing

approximately 10 m in diameter. The 45 ° cone above the rain gauge may have been slightly encroached

upon by treetops.

The canopy meteorological data were collected using a Campbell 21X data logger. Sensors were

scanned every 60 s, and half-hour averages were recorded. Vapor pressure was calculated as described

above. The reported air pressure was atmospheric (i.e., not corrected to sea level) rather than

barometric pressure. Air pressure was recorded to the nearest mb until day of year 215 at 2000

Greenwich Mean Time (GMT), and to the nearest hundredth of amb thereafter. The leaf wetness

sensors were artificial leaf electrical resistance types, with interlacing gold plated copper fingers. Water

droplets that bridge between fingers lower the resistance. These sensors were not painted or coated.

The manufacturer suggests that the transition from "wet" to "dry" for an uncoated sensor occurs

between 50 and 200 kohms. The first leaf wetness sensor was deployed in a small opening in the

trees, sloping about 40 ° to the northeast. The second leaf wetness sensor was deployed about 10 cm

from a tree trunk, sloping about 40 ° to the west.

Tree bole temperatures were collected using a Campbell 21X data logger. Copper-constantan

thermocouples were glued into tree boles to make all of these temperature measurements. A Campbell

AM416 multiplexer was used to route the thermocouples to the logger. An extra thermocouple

reference junction was glued to the AM416 surface, and the AM416 was enclosed in a Campbell

AM-ENCT insulating enclosure to minimize temperature gradients in the AM416. Sensors were

scanned every 5 s during the last minute of each half-hour, and averages of the 13 readings were

recorded.

Two trees were chosen to instrument. The first was 4.6 m tall, about average for the canopy.

Thermocouples were inserted into the north, east, south, and west sides, to approximately one half the

radius of the trunk, at four heights. The four heights were 0.58 m, 1.73 m, 2.79 m, and 3.68 m; the

corresponding trunk diameters at those heights were 5.7 cm, 5.1 cm, 3.8 cm, and 2.9 cm. The second

tree was about 3.6 m tall. The four heights were 0.46 m, 1.35 m, 2.24 m, and 2.74 m; the

corresponding diameters were 3.3 cm, 2.9 cm, 2.2 cm, and 1.1 cm. In the reported data set, the 16

temperatures from each tree were averaged together for each half-hour, and the mean temperature was

reported.

Page 6
6. Observations

6.1 Data Notes

Measurements began during IFC-1 and ended a day after IFC-3. Equipment operated almost

continuously. Notable were the lack of CO2 data following a lightning strike and a malfunction of the

CO2 sensor 16-Jun to 20-Jun and 10-Jul to 19-Ju1-1994. CO2 profile instruments were not operational

until IFC-2. Forest floor sensible and latent heat flux record had numerous lapses due to equipment

problems. Considering all measurements, IFC-3 had the most complete record.

6.2 Field Notes

None.

7. Data Description

7.1 Spatial Characteristics

7.1.1 Spatial Coverage

All data were collected at the BOREAS SSA-YJP site. North American Datum of 1983 (NAD83)

coordinates for the site are latitude 53.87581 ° N, longitude 104.64529 ° W, and elevation of 533.54 m.

7.1.2 Spatial Coverage Map

Not applicable.

7.1.3 Spatial Resolution

Data collected from flux towers are often thought of as point data. However, particularly in terms

of the eddy flux data, they actually represent an integrated upwind source region. The size of the

region being sampled is related to factors such as the height of the tower, the roughness of the canopy,

and the wind speed. An estimate of the upwind distance for the YJP site is 20 to 400 m upwind.

7.1.4 Projection

Not applicable.

7.1.5 Grid Description

Not applicable.

7.2 Temporal Characteristics

7.2.1 Temporal Coverage

Meteorological data were collected from 02- to 06-Sep-1993, and during 1994 from 15-May to

20-Sep. Within-canopy meteorological data were collected continuously during 1994 from 03-Jun to

20-Sep, except for a gap from 04- to 07-Aug. Tree bole temperature data were collected continuously

from 10-Jun to 20-Sep-1994, except for a gap from 14-Jun to 21-Jun. Flux data were collected from

26-May to 20-Sep-1994. There were gaps in CO2 data following a lightning strike and a malfunction

of the CO2 sensor 16-Jun to 20-Jun and 10-Jul to 19-Ju1-1994. CO2 profile instruments were not

operational until IFC-2. The forest floor sensible and latent heat flux record had numerous lapses due

to equipment problems.

7.2.2 Temporal Coverage Map

None.

Page 7
7.2.3 Temporal Resolution

Meteorological and radiation sensors were scanned every 5 s, and half-hour averages were

recorded. Within-canopy meteorology data sensors were scanned every 60 s, and half-hour averages

were recorded. Tree bole temperature sensors were scanned every 5 s during the last minute of each

half-hour, and averages of the 13 readings were recorded.

7.3 Data Characteristics

7.3.1 Parameter/Variable

The parameters contained in the data files on the CD-ROM are:

Column Name

SITE NAME

SUB SITE

DATE OBS

TIME OBS

SENSIBLE HEAT FLUX ABV CNPY

CAM SENS HEAT FLUX ABV CNPY

LATENT HEAT FLUX ABV CNPY

CAM LATENT HEAT FLUX ABV CNPY

NET RAD ABV CNPY

CO2 FLUX ABV CNPY

LIC CO2 FLUX ABV CNPY

CO2 FLUX PROFILE

CO2 CONC ABV CNPY

WIND SPEED ABV CNPY

WIND SPEED ABV CNPY 2

MAGN WINDSPEED VECTOR ABV CNPY

WIND DIR ABV CNPY

MEAN WIND DIR ABV CNPY

SDEV WIND DIR ABV CNPY

WIND SPEED IIOCM

FRICTION VEL ABV CNPY

STABILITY INDEX ABV CNPY

DOWN PAR ABV CNPY

DOWN PPFD ABV CNPY

AIR TEMP ABV CNPY

AIR TEMP ABV CNPY 2

AIR TEMP IIOCM

DOWN SOLAR RAD ABV CNPY

DOWN SOLAR RAD ABV CNPY 2

VAPOR PRESS ABV CNPY

VAPOR PRESS ABV CNPY 2

VAPOR PRESS IIOCM

VAPOR PRESS DEFICIT ABV CNPY

VAPOR PRESS DEFICIT IIOCM

SURF PRESS

SENSIBLE HEAT FLUX BELOW CNPY

LATENT HEAT FLUX BELOW CNPY

MEAN BOLE TEMP 1

MEAN BOLE TEMP 2

CNPY AIR TEMP 120CM

CNPY VAPOR PRESS 120CM

Page 8
CNPY SURF PRESS 170CH

LEAF WET 160CM

LEAF WET 140CM

RAINFALL

CRTFCN CODE

REVISION DATE

7.3.2 Variable Description/Definition

The descriptions of the parameters contained in the data files on the CD-ROM are:

Column Name Description

SITE NAME

SUB SITE

DATE OBS

TIME OBS

SENSIBLE HEAT FLUX ABV CNPY

CAM SENS HEAT FLUX ABV CNPY

LATENT HEAT FLUX ABV CNPY

CAM LATENT HEAT FLUX ABV CNPY

NET RAD ABV CNPY

CO2 FLUX ABV CNPY

LIC CO2 FLUX ABV CNPY

CO2 FLUX PROFILE

CO2 CONC ABV CNPY

WIND SPEED ABV CNPY

WIND SPEED ABV CNPY 2

The identifier assigned to the site by BOREAS,

in the format SSS-TTT-CCCCC, where SSS identifies

the portion of the study area: NSA, SSA, REG,

TRN, and TTT identifies the cover type for the

site, 999 if unknown, and CCCCC is the identifier

for site, exactly what it means will vary with

site type.

The identifier assigned to the sub-site by BOREAS

in the format GGGGG-IIIII, where GGGGG is the

group associated with the sub-site instrument,

e.g. HYD06 or STAFF, and IIIII is the identifier

for sub-site, often this will refer to an

instrument.

The date on which the data were collected.

The Greenwich Mean Time (GMT) of the start of the

data collection.

The sensible heat flux measured above the canopy

The sensible heat flux measured above the canopy

using the Campbell Scientific sensor.

The latent heat flux measured above the canopy.

The latent heat flux measured above the canopy

using the Campbell Scientific sensor.

The net radiation measured above the canopy.

The carbon dioxide flux measured above the canopy

The carbon dioxide flux measured above the canopy

using the LiCor instrument.

The CO2 flux profile.

The carbon dioxide concentration measured above

the canopy.

The wind speed measured above the canopy.

The mean wind speed measured above the canopy

over a 30 minute period.

MAGN WINDSPEED VECTOR ABV CNPY The magnitude of the winspeed vector measured

WIND DIR ABV CNPY

MEAN WIND DIR ABV CNPY

SDEV WIND DIR ABV CNPY

above the canopy.

The direction from which the wind is blowing (in

creasing in a clockwise direction from the North)

and measured above the canopy.

The mean wind direction measured above the canopy

over a 30 minute period.

The standard deviation of the wind direction

measured above the canopy over a 30 minute

period.

Page 9
WIND SPEED IIOCM

FRICTION VEL ABV CNPY

STABILITY INDEX ABV CNPY

DOWN PAR ABV CNPY

DOWN PPFD ABV CNPY

AIR TEMP ABV CNPY

AIR TEMP ABV CNPY 2

AIR TEMP IIOCM

DOWN SOLAR RAD ABV CNPY

DOWN SOLAR RAD ABV CNPY 2

VAPOR PRESS ABV CNPY

VAPOR PRESS ABV CNPY 2

VAPOR PRESS IIOCM

VAPOR PRESS DEFICIT ABV CNPY

VAPOR PRESS DEFICIT IIOCM

SURF PRESS

SENSIBLE HEAT FLUX BELOW CNPY

LATENT HEAT FLUX BELOW CNPY

MEAN BOLE TEMP 1

MEAN BOLE TEMP 2

CNPY AIR TEMP 120CM

CNPY VAPOR PRESS 120CM

CNPY SURF PRESS 170CM

LEAF WET 160CM

LEAF WET 140CM

RAINFALL

CRTFCN CODE

REVISION DATE

The wind speed measured at i.i meters above

ground level.

The friction velocity above the canopy.

The z/L stability index measured above the canopy

The incoming photosynthetically active radiation

measured above the canopy.

The downward (incoming) photosynthetic photon

flux density measured above the canopy.

The air temperature measured above the canopy.

The mean air temperature measured above the

canopy over a 30 minute period.

The air temperature measured at i.i meters above

ground level.

The downward (incoming) solar radiation measured

above the canopy.

The downward (incoming) solar radiation measured

above the canopy.

The vapor pressure measured above the canopy.

The mean vapor pressure measured above the canopy

over a 30 minute period.

The vapor pressure measured at i.i meters above

ground level.

The vapor pressure deficit measured above the

canopy.

The vapor pressure deficit measured at i.i meters

above ground level.

The atmospheric pressure measured at the station

The sensible heat flux measured below the canopy

The latent heat flux measured below the canopy.

The average bole temperature for tree i.

The average bole temperature for tree 2.

The air temperature measured within the canopy

at a height of 1.2 meters.

The vapor pressure measured within the canopy at

a height of 1.2 meters.

The atmospheric pressure measured within the

canopy at a height of 1.7 meters above ground

level.

The leaf wetness measured by an artificial leaf

electrical resistance sensor. The sensor was

placed in an opening in the trees at a height of

1.6 meters.

The leaf wetness measured by an artificial leaf

electrical resistance sensor. The sensor was

placed i0 cm from a tree trunk at a height of

1.4 meters.

The amount of rainfall measured above the canopy

in the 30 minute period following the given time

The BOREAS certification level of the data.

Examples are CPI (Checked by PI), CGR (Certified

by Group), PRE (Preliminary), and CPI-??? (CPI

but questionable).

The most recent date when the information in the

referenced data base table record was revised.

Page 10
7.3.3 Unit of Measurement

The measurement units for the parameters contained in the data files on the CD-ROM are:

Column Name Units

SITE NAME

SUB SITE

DATE OBS

TIME OBS

SENSIBLE HEAT FLUX ABV CNPY

CAM SENS HEAT FLUX ABV CNPY

LATENT HEAT FLUX ABV CNPY

CAM LATENT HEAT FLUX ABV CNPY

NET RAD ABV CNPY

CO2 FLUX ABV CNPY

LIC CO2 FLUX ABV CNPY

CO2 FLUX PROFILE

CO2 CONC ABV CNPY

WIND SPEED ABV CNPY

WIND SPEED ABV CNPY 2

MAGN WINDSPEED VECTOR ABV CNPY

WIND DIR ABV CNPY

MEAN WIND DIR ABV CNPY

SDEV WIND DIR ABV CNPY

WIND SPEED IIOCM

FRICTION VEL ABV CNPY

STABILITY INDEX ABV CNPY

DOWN PAR ABV CNPY

DOWN PPFD ABV CNPY

AIR TEMP ABV CNPY

AIR TEMP ABV CNPY 2

AIR TEMP IIOCM

DOWN SOLAR RAD ABV CNPY

DOWN SOLAR RAD ABV CNPY 2

VAPOR PRESS ABV CNPY

VAPOR PRESS ABV CNPY 2

VAPOR PRESS IIOCM

VAPOR PRESS DEFICIT ABV CNPY

VAPOR PRESS DEFICIT IIOCM

SURF PRESS

SENSIBLE HEAT FLUX BELOW CNPY

LATENT HEAT FLUX BELOW CNPY

MEAN BOLE TEMP 1

MEAN BOLE TEMP 2

CNPY AIR TEMP 120CM

CNPY VAPOR PRESS 120CM

CNPY SURF PRESS 170CM

LEAF WET 160CM

LEAF WET 140CM

RAINFALL

CRTFCN CODE

REVISION DATE

[none]

[none]

[DD-MON-YY]

[HHMM GMT]

[Watts] [meter^-2]

[Watts] [meter^-2]

[Watts] [meter^-2]

[Watts] [meter^-2]

[Watts] [meter^-2]

[micromoles] [meter^-2] [second^-l]

[micromoles] [meter^-2] [second^-l]

[micromoles] [meter^-2] [second]

[parts per million]

[meters] [second^-l]

[meters] [second^-l]

[meters] [second^-l]

[degrees]

[degrees from north]

[degrees from north]

[meters] [second^-l]

[meters] [seconds^-l]

[unitless]

[watts] [meter^-2]

[micromoles] [meter^-2] [second^-l]

[degrees Celsius]

[degrees Celsius]

[degrees Celsius]

[Watts] [meter^-2]

[Watts] [meter^-2]

[kiloPascals]

[kiloPascals]

[kiloPascals]

[kiloPascals]

[kiloPascals]

[kiloPascals]

[Watts] [meter^-2]

[Watts] [meter^-2]

[degrees Celsius]

[degrees Celsius]

[degrees Celsius]

[kiloPascals]

[kiloPascals]

[kilo ohms]

[kilo ohms]

[millimeters]

[none]

[DD-MON-YY]

Page 11
7.3.4 Data Source

The source of the parameter values contained in the data files on the CD-ROM are:

Column Name Data Source

SITE NAME

SUB SITE

DATE OBS

TIME OBS

SENSIBLE HEAT FLUX ABV CNPY

CAM SENS HEAT FLUX ABV CNPY

LATENT HEAT FLUX ABV CNPY

CAM LATENT HEAT FLUX ABV CNPY

NET RAD ABV CNPY

CO2 FLUX ABV CNPY

LIC CO2 FLUX ABV CNPY

CO2 FLUX PROFILE

CO2 CONC ABV CNPY

WIND SPEED ABV CNPY

WIND SPEED ABV CNPY 2

[Assigned by BORIS.]

[Assigned by BORIS.]

[Supplied by Investigator.]

[Supplied by Investigator.]

[ATI sonic anemometer]

[Campbell sonic anemometer]

[ATI sonic anemometer]

[Campbell sonic anemometer]

[net radiometer]

[ATD CO2 sensor]

[LiCor CO2 sensor]

[CO2 sensor]

[CO2 sensor]

[anemometer]

[anemometer]

MAGN WINDSPEED VECTOR ABV CNPY [anemometer]

WIND DIR ABV CNPY

MEAN WIND DIR ABV CNPY

SDEV WIND DIR ABV CNPY

WIND SPEED IIOCM

FRICTION VEL ABV CNPY

STABILITY INDEX ABV CNPY

DOWN PAR ABV CNPY

DOWN PPFD ABV CNPY

AIR TEMP ABV CNPY

AIR TEMP ABV CNPY 2

AIR TEMP IIOCM

DOWN SOLAR RAD ABV CNPY

DOWN SOLAR RAD ABV CNPY 2

VAPOR PRESS ABV CNPY

VAPOR PRESS ABV CNPY 2

VAPOR PRESS IIOCM

VAPOR PRESS DEFICIT ABV CNPY

VAPOR PRESS DEFICIT IIOCM

SURF PRESS

SENSIBLE HEAT FLUX BELOW CNPY

LATENT HEAT FLUX BELOW CNPY

MEAN BOLE TEMP 1

MEAN BOLE TEMP 2

CNPY AIR TEMP 120CM

CNPY VAPOR PRESS 120CM

CNPY SURF PRESS 170CM

LEAF WET 160CM

LEAF WET 140CM

RAINFALL

CRTFCN CODE

REVISION DATE

[windvane]

[windvane]

[windvane]

[anemometer]

[sonic anemometer]

[Supplied by Investigator.]

[quantum sensor]

[quantum sensor]

[psychrometer]

[psychrometer]

[psychrometer]

[solarimeter]

[solarimeter]

[psychrometer]

[psychrometer]

[psychrometer]

[psychrometer]

[psychrometer]

[barometer]

[ATI sonic anemometer]

[ATI sonic anemometer]

[thermocouple]

[thermocouple]

[psychrometer]

[psychrometer]

[barometer]

[wetness sensor]

[wetness sensor]

[tipping bucket rain gauge]

[Assigned by BORIS.]

[Assigned by BORIS.]

Page 12
7.3.5 Data Range

The following table gives information about the parameter values found in the data files on the

CD-ROM.

Minimum Maximum Missng Unrel Below Data

Data Data Data Data Detect Not

Column Name Value Value Value Value Limit Cllctd

SITE NAME SSA-YJP-FLXTR SSA-YJP-FLXTR None None None None

SUB SITE 9TF04-FLX01 9TF04-FLX01 None None None None

DATE OBS 02-SEP-93 20-SEP-94 None None None None

TIME OBS 0 2330 None None None None

SENSIBLE HEAT FLUX -83.1 9999 None None None Blank

ABV CNPY

CAM SENS HEAT FLUX -97.3 512.2 -999 None None Blank

ABV CNPY

LATENT HEAT FLUX ABV -19.9 481.3 -999 None None Blank

CNPY

CAM LATENT HEAT FLUX -116.5 454.1 -999 None None Blank

ABV CNPY

NET RAD ABV CNPY

CO2 FLUX ABV CNPY

LIC CO2 FLUX ABV

CNPY

CO2 FLUX PROFILE

CO2 CONC ABV CNPY

WIND SPEED ABV CNPY

WIND SPEED ABV CNPY

2

MAGN WINDSPEED

VECTOR ABV CNPY

WIND DIR ABV CNPY

MEAN WIND DIR ABV

CNPY

SDEV WIND DIR ABV

CNPY

WIND SPEED ll0CM

FRICTION VEL ABV

CNPY

STABILITY INDEX ABV

CNPY

DOWN PAR ABV CNPY

DOWN PPFD ABV CNPY

AIR TEMP ABV CNPY

AIR TEMP ABV CNPY 2

AIR TEMP ll0CM

DOWN SOLAR RAD ABV

CNPY

DOWN SOLAR RAD ABV

CNPY 2

VAPOR PRESS ABV CNPY

VAPOR PRESS ABV CNPY

2

VAPOR PRESS ll0CM

VAPOR PRESS DEFICIT

-78

-5.88

-15 2

-18 1

290

0

.2

.01

-13 5

-1

-- . 6

-.56

-.56

-4.04

-i

-i

493

48

46

689

i0 88

14 67

19 59

44 .5

8 3

8 3

7 69

360

359.9

79.9

1.89

6.11

60.52

1850

1917

29.82

29.82

32.65

939

982

2.201

2 19

2 522

3 129

-999 None None Blank

-999 None None Blank

-999 None None Blank

-999 None None Blank

-999 None None Blank

-999 None None Blank

None None None Blank

None None None Blank

None None None Blank

None None None Blank

None None None Blank

-999 None None Blank

-999 None None Blank

-999 None None Blank

None None None Blank

None None None Blank

None None None Blank

None None None Blank

-999 None None Blank

-999 None None Blank

None None None Blank

None None None Blank

None None None Blank

-999 None None Blank

-999 None None Blank

Page 13
ABVCNPY

VAPORPRESSDEFICIT -.@99

ll0CH

SURFPRESS 93.2

SENSIBLEHEATFLUX -32.3

BELOWCNPY

LATENTHEATFLUX -85.7

BELOWCNPY

MEANBOLETEMP1 -1.78

MEANBOLETEMP2 -2.93

CNPYAIR TEMP120CM -4.@4

3.798 -999 None None Blank

999 None None None Blank

453.3 -999 None None Blank

330 -999 None None Blank

35.02 None None None Blank

36.18 None None None Blank

32.65 None None None Blank

CNPY VAPOR PRESS .443 2.519 None None None Blank

120CM

CNPY SURF PRESS 93.2 96.912 None None None Blank

170CM

LEAF WET 160CM 2.6 6812 -999 None None Blank

LEAF WET 140CM 2 6859 -999 None None Blank

RAINFALL 0 12.75 None None None Blank

CRTFCN CODE CPI CPI None None None None

REVISION DATE 27-APR-99 27-APR-99 None None None None

Minimum Data Value -- The minimum value found in the column.

Maximum Data Value -- The maximum value found in the column.

Missng Data Value -- The value that indicates missing data. This is used to

indicate that an attempt was made to determine the

parameter value, but the attempt was unsuccessful.

Unrel Data Value -- The value that indicates unreliable data. This is used

to indicate an attempt was made to determine the

parameter value, but the value was deemed to be

unreliable by the analysis personnel.

Below Detect Limit -- The value that indicates parameter values below the

instruments detection limits. This is used to

indicate that an attempt was made to determine the

parameter value, but the analysis personnel determined

that the parameter value was below the detection

limit of the instrumentation.

Data Not Cllctd -- This value indicates that no attempt was made to

determine the parameter value. This usually

indicates that BORIS combined several similar but

not identical data sets into the same data base table

but this particular science team did not

measure that parameter.

Blank -- Indicates that blank spaces are used to denote that type of value.

N/A -- Indicates that the value is not applicable to the respective column.

None -- Indicates that no values of that sort were found in the column.

Page 14
7.4 Sample Data Record

The following are wrapped versions of data record from a sample data file on the CD-ROM.

SITE NAME,SUB SITE,DATE OBS,TIME OBS,SENSIBLE HEAT FLUX ABV CNPY,

CAM SENS HEAT FLUX ABV CNPY, LATENT HEAT FLUX ABV CNPY,

CAM LATENT HEAT FLUX ABV CNPY,NET RAD ABV CNPY,CO2 FLUX ABV CNPY,

LIC CO2 FLUX ABV CNPY,CO2 FLUX PROFILE,CO2 CONC ABV CNPY,WIND SPEED ABV CNPY,

WIND SPEED ABV CNPY 2,MAGN WINDSPEED VECTOR ABV CNPY,WIND DIR ABV CNPY,

MEAN WIND DIR ABV CNPY, SDEV WIND DIR ABV CNPY,WIND SPEED IIOCM,

FRICTION VEL ABV CNPY, STABILITY INDEX ABV CNPY,DOWN PAR ABV CNPY,

DOWN PPFD ABV CNPY,AIR TEMP ABV CNPY,AIR TEMP ABV CNPY 2,AIR TEMP IIOCM,

DOWN SOLAR RAD ABV CNPY,DOWN SOLAR RAD ABV CNPY 2,VAPOR PRESS ABV CNPY,

VAPOR PRESS ABV CNPY 2,VAPOR PRESS IIOCM, VAPOR PRESS DEFICIT ABV CNPY,

VAPOR PRESS DEFICIT IIOCM, SURF PRESS,SENSIBLE HEAT FLUX BELOW CNPY,

LATENT HEAT FLUX BELOW CNPY,MEAN BOLE TEMP 1,MEAN BOLE TEMP 2,

CNPY AIR TEMP 120CM, CNPY VAPOR PRESS 120CM, CNPY SURF PRESS 170CM, LEAF WET 160CM,

LEAF WET 140CM, RAINFALL,CRTFCN CODE,REVISION DATE

'SSA-YJP-FLXTR', '9TF04-FLX01',01-JUN-94,0,9999.0,-16.5,-999.0,-15.8,-46.0,-999.0,

-999.0,-999.0,-999.0,1.62,2.99,2.3,85.0,303.4,38.8,-999.0,-999.0,-999.0,-1.0,

763.0,12.95,20.91,-999.0,0.0,388.7,.687,.49,-999.0,.806,-999.0,999.0,-999.0,

-999.0 ........ 0.0, 'CPI',27-APR-99

8. Data Organization

8.1 Data Granularity

The smallest unit of data tracked by the BOREAS Information System (BORIS) was data collected

at a given site on a given date.

8.2 Data Format

The Compact Disk-Read-Only Memory (CD-ROM) files contain American Standard Code for

Information Interchange (ASCII) numerical and character fields of varying length separated by

commas. The character fields are enclosed with single apostrophe marks. There are no spaces between

the fields.

Each data file on the CD-ROM has four header lines of Hyper-Text Markup Language (HTML)

code at the top. When viewed with a Web browser, this code displays header information (data set

title, location, date, acknowledgments, etc.) and a series of HTML links to associated data files and

related data sets. Line 5 of each data file is a list of the column names, and line 6 and following lines

contain the actual data.

9. Data Manipulations

9.1 Formulae

9.1.1 Derivation Techniques and Algorithms

Vapor pressure was calculated as product of saturated vapor pressure at air temperature and relative

humidity. Saturated vapor pressure was calculated using the Lowe (1977) equation.

Tree bole temperatures were scanned every 5 s during the last minute of each half-hour, and

averages of the 13 readings were recorded. Thermocouples were inserted into the boles of two trees on

the north, east, south, and west sides, to approximately one half the radius of the trunk, at four

heights. In the reported data set the 16 temperatures from each tree were averaged together for each

half-hour, and the mean temperature was reported.

Page 15
9.2 Data Processing Sequence

9.2.1 Processing Steps

BORIS staff processed these data by:

• Reviewing the initial data files and loading them online for BOREAS team access.

• Designing relational data base tables to inventory and store the data.

• Loading the data into the relational data base tables.

• Working with the team to document the data set.

• Extracting the data into logical files.

9.2.2 Processing Changes

None.

9.3 Calculations

9.3.1 Special Corrections/Adjustments

Air pressure was recorded to the nearest mb until day of year 215 at 2000 GMT, and to the nearest

hundredth of a mb thereafter.

9.3.2 Calculated Variables

See Section 9.1.1.

9.4 Graphs and Plots

None.

10. Errors

10.1 Sources of Error

None given.

10.2 Quality Assessment

10.2.1 Data Validation by Source

None given.

10.2.2 Confidence Level/Accuracy Judgment

None given.

10.2.3 Measurement Error for Parameters

None given.

10.2.4 Additional Quality Assessments

None given.

10.2.5 Data Verification by Data Center

Data were examined to check for spikes, values that are four standard deviations from the mean,

long periods of constant values, and missing data.

Page 16
11. Notes

11.1 Limitations of the Data

These data were collected during the growing season; thus, there was little data collected under

cold conditions.

11.2 Known Problems with the Data

The tipping bucket rain gauge was deployed in clearing about 10 m in diameter. The 45 ° cone

above the rain gauge may have been slightly encroached upon by treetops.

There is a gap in the CO2 data following a lightning strike and a malfunction of the CO2 sensor

16-Jun to 20-Jun and 10-Jul to 19-Jul-1994. CO2 profile instruments were not operational until IFC-2.

The forest floor sensible and latent heat flux record had numerous lapses due to equipment problems.

11.3 Usage Guidance

None given.

11.4 Other Relevant Information

None.

12. Application of the Data Set

These data are useful for the study of water, energy, and carbon exchange in a young jack pine forest.

13. Future Modifications and Plans

None.

14. Software

14.1 Software Description

None given.

14.2 Software Access

None given.

15. Data Access

The SSA-YJP tower flux, meteorological, and canopy condition data are available from the Earth

Observing System Data and Information System (EOSDIS) Oak Ridge National Laboratory (ORNL)

Distributed Active Archive Center (DAAC).

15.1 Contact Information

For BOREAS data and documentation please contact:

ORNL DAAC User Services

Oak Ridge National Laboratory

P.O. Box 2008 MS-6407

Oak Ridge, TN 37831-6407

Phone: (423) 241-3952

Fax: (423) 574-4665

E-mail: ornldaac@ornl.gov or ornl@eos.nasa.gov

Page 17
15.2 Data Center Identification

Earth Observing System Data and Information System (EOSDIS) Oak Ridge National Laboratory

(ORNL) Distributed Active Archive Center (DAAC) for Biogeochemical Dynamics

http://www-eosdis.ornl.gov/.

15.3 Procedures for Obtaining Data

Users may obtain data directly through the ORNL DAAC online search and order system

[http://www-eosdis.ornl.gov/] and the anonymous FTP site [ftp://www-eosdis.ornl.gov/data/] or by

contacting User Services by electronic mail, telephone, fax, letter, or personal visit using the contact

information in Section 15.1.

15.4 Data Center Status/Plans

The ORNL DAAC is the primary source for BOREAS field measurement, image, GIS, and

hardcopy data products. The BOREAS CD-ROM and data referenced or listed in inventories on the

CD-ROM are available from the ORNL DAAC.

16. Output Products and Availability

16.1 Tape Products

None.

16.2 Film Products

None.

16.3 Other Products

These data are available on the BOREAS CD-ROM series.

17. References

17.1 Platform/Sensor/Instrument/Data Processing Documentation

None.

17.2 Journal Articles and Study Reports

Lowe, P.R. 1977. An approximating polynomial for the computation of saturation vapor pressure.

Journal of Applied Meteorology, 16(1): 100-103.

Newcomer, J., D. Landis, S. Conrad, S. Curd, K. Huemmrich, D. Knapp, A. Morrell, J. Nickeson,

A. Papagno, D. Rinker, R. Strub, T. Twine, F. Hall, and P. Sellers, eds. 2000. Collected Data of The

Boreal Ecosystem-Atmosphere Study. NASA. CD-ROM.

Sellers, P. and F. Hall. 1994. Boreal Ecosystem-Atmosphere Study: Experiment Plan. Version

1994-3.0, NASA BOREAS Report (EXPLAN 94).

Sellers, P. and F. Hall. 1996. Boreal Ecosystem-Atmosphere Study: Experiment Plan. Version

1996-2.0, NASA BOREAS Report (EXPLAN 96).

Sellers, P., F. Hall, and K.F. Huemmrich. 1996. Boreal Ecosystem-Atmosphere Study: 1994

Operations. NASA BOREAS Report (OPS DOC 94).

Sellers, P., F. Hall, and K.F. Huemmrich. 1997. Boreal Ecosystem-Atmosphere Study: 1996

Operations. NASA BOREAS Report (OPS DOC 96).

Page 18
Sellers,P.,F. Hall, H. Margolis,B. Kelly, D. Baldocchi,G. denHartog,J.Cihlar, M.G. Ryan,B.

Goodison,P.Crill, K.J.RansomD. Lettenmaier,andD.E. Wickland. 1995.Theboreal

ecosystem-atmospherestudy(BOREAS):anoverviewandearlyresultsfrom the1994field year.

Bulletinof theAmericanMeteorologicalSociety.76(9):1549-1577.

Sellers,P.J.,F.G.Hall, R.D.Kelly, A. Black, D. Baldocchi,J. Berry, M. Ryan,K.J. Ranson,P.M.

Crill, D.P.Lettenmaier,H. Margolis,J.Cihlar, J.Newcomer,D. Fitzjarrald,P.G.Jarvis,S.T.

Gower,D. Halliwell, D. Williams, B. Goodison,D.E.Wickland, andF.E.Guertin.1997.BOREAS

in 1997:ExperimentOverview,ScientificResultsandFutureDirections.Journalof Geophysical

Research102(D24):28,731-28,770.

17.3 Archive/DBMS Usage Documentation

None.

None.

18. Glossary of Terms

ASCII

ATD

ATI

BOREAS

BORIS

CD-ROM

DAAC

EOS

EOSDIS

GIS

GMT

GSFC

HTML

IFC

NAD83

NASA

NCAR

NEP

NSA

ORNL

PANP

PAR

SSA

TF

URL

USGS

YJP

19. List of Acronyms

- American Standard Code for Information Interchange

- Atmospheric Technology Division

- Applied Technologies, Inc.

- BOReal Ecosystem-Atmosphere Study

- BOREAS Information System

- Compact Disk-Read-Only Memory

- Distributed Active Archive Center

- Earth Observing System

- EOS Data and Information System

- Geographic Information System

- Greenwich Mean Time

- Goddard Space Flight Center

- Hyper-text Markup Language

- Intensive Field Campaign

- North American Datum of 1983

- National Aeronautics and Space Administration

- National Center for Atmospheric Research

- Net Ecosystem Productivity

- Northern Study Area

- Oak Ridge National Laboratory

- Prince Albert National Park

- Photosynthetically Active Radiation

- Southern Study Area

- Tower Flux

- Uniform Resource Locator

- United States Geological Survey

- Young Jack Pine

Page 19
20. Document Information

20.1 Document Revision Date

Written: 22-April- 1999

Revised: 16-Sep- 1999

20.2 Document Review Date(s)

BORIS Review: 04-May- 1999

Science Review:

20.3 Document ID

20.4 Citation

When using these data, please include the following acknowledgment as well as citations of

relevant papers in Section 17.2:

Data were collected and processed by Dean Anderson, Rob Striegl, and Kimberly Wickland of the

United States Geological Survey.

If using data from the BOREAS CD-ROM series, also reference the data as:

Anderson, D., R. Striegl, and K. Wickland, "Exchange of Trace Gases, Water, and Energy in

Disturbed and Undisturbed Boreal Forests." In Collected Data of The Boreal Ecosystem-Atmosphere

Study. Eds. J. Newcomer, D. Landis, S. Conrad, S. Curd, K. Huemmrich, D. Knapp, A. Morrell, J.

Nickeson, A. Papagno, D. Rinker, R. Strub, T. Twine, F. Hall, and P. Sellers. CD-ROM. NASA,

2000.

Also, cite the BOREAS CD-ROM set as:

Newcomer, J., D. Landis, S. Conrad, S. Curd, K. Huemmrich, D. Knapp, A. Morrell, J.

Nickeson, A. Papagno, D. Rinker, R. Strub, T. Twine, F. Hall, and P. Sellers, eds. Collected Data of

The Boreal Ecosystem-Atmosphere Study. NASA. CD-ROM. NASA, 2000.

20.5 Document Curator

20.6 Document URL

Page 20
REPORT DOCUMENTATION PAGE FormApproved

OMB No. 0704-0188

Public reporting burden for this collection of informationis estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources,

gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this

collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson

Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503.

1. AGENCY USE ONLY (Leave blank) 2. REPORT DATE 3. REPORT TYPE AND DATES COVERED

October 2000 Technical Memorandum

4. TITLE AND SUBTITLE

Technical Report Series on the Boreal Ecosystem-Atmosphere Study (BOREAS)

BOREAS TF-4 SSA-YJP Tower Flux, Meteorological, and Canopy Condition

Data

6. AUTHOR(S)

Robert Striegl and Kimberly Wickland

Forrest G. Hall and Karl Huemmrich, Editors

7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS (ES)

Goddard Space Flight Center

Greenbelt, Maryland 20771

9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS (ES)

National Aeronautics and Space Administration

Washington, DC 20546-0001

5. FUNDING NUMBERS

923

RTOP: 923-462-33-01

8. PEFORMING ORGANIZATION

REPORT NUMBER

2000-03136-0

10. SPONSORING / MONITORING

AGENCY REPORT NUMBER

TM--2000-209891

Vo1.197

11. SUPPLEMENTARY NOTES

R. Striegl and K. Wickland: U.S. Geological Survey, Denver;

K. Huemmrich: University of Maryland, NASA Goddard Space Flight Center, Greenbelt, Maryland

12a. DISTRIBUTION / AVAILABILITY STATEMENT

Unclassifie_Unlimited

Subject Category: 43

Report available from the NASA Center for AeroSpace Information,

7121 Standard Drive, Hanover, MD 21076-1320. (301) 621-0390.

12b. DISTRIBUTION CODE

13. ABSTRACT (Maximum 200 words)

The BOREAS TF-4 team collected energy, carbon dioxide, and water vapor flux data at the BOREAS

SSA-YJP site during the growing season of 1994. In addition, meteorological data were collected both

above and within the canopy. The data are available in tabular ASCII files.

14. SUBJECT TERMS

BOREAS, tower flux, meteorological data, canopy condition data.

17. SECURITY CLASSIFICATION

OF REPORT

Unclassified

NSN 7540-01-280-5500

18. SECURITY CLASSIFICATION

OF THIS PAGE

Unclassified

19. SECURITY CLASSIFICATION

OF ABSTRACT

Unclassified

15. NUMBER OF PAGES

2O

16. PRICE CODE

20. LIMITATION OF ABSTRACT

UL

Standard Form 298 (Rev. 2-89)

Prescribed by ANSI Std. Z39.18

298-102