NASA/TMm2000-209891, Vol. 196

Technical Report Series on the

Boreal Ecosystem-Atmosphere Study (BOREAS)

Forrest G. Hall and Sara Conrad, Editors

Volume 196

BOREAS TF-3 Automated

Chamber CO 2Flux Data

from the NSA-OBS

Michael L. Goulden, University of California, Irvine

Patrick M. Crill, University of New Hampshire, Durham

National Aeronautics and

Space Administration

Goddard Space Flight Center

Greenbelt, Maryland 20771

October 2000

https://ntrs.nasa.gov/search.jsp?R=20010022991 2018-05-14T18:56:34+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. 196

Technical Report Series on the

Boreal Ecosystem-Atmosphere Study (BOREAS)

Forrest G. Hall and Sara Conrad, Editors

Volume 196

BOREAS TF-3 Automated

Chamber CO 2Flux Data

from the NSA-OBS

Michael L. Goulden, University of California, Irvine

Patrick M. Crill, University of New Hampshire, Durham

National Aeronautics and

Space Administration

Goddard Space Flight Center

Greenbelt, Maryland 20771

October 2000
NASA Center for AeroSpace Information

7121 Standard Drive

Hanover, MD 21076-1320

Price Code: A17

Available from:

National Technical Information Service

5285 Port Royal Road

Springfield, VA 22161

Price Code: A10
BOREAS TF-3 Automated Chamber CO2 Flux Data from the NSA-OBS

Michael L. Goulden, Patrick M. Crill

Summary

The BOREAS TF-3 and TGB-1 teams collected automated C02 chamber flux data in their efforts to

fully describe the CO2 flux at the NSA-OBS site. This data set contains fluxes of CO2 at the

NSA-OBS site measured using automated chambers. In addition to reporting the CO2 flux, it reports

chamber air temperature, moss temperature, and light levels during each measurement. The data set

covers the period from 23-Sep-1995 through 26-Oct-1995 and from 28-May-1996 through

21-Oct-1996. The data are stored 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-03 Automated Chamber CO 2 Flux Data from the NSA-OBS

1.2 Data Set Introduction

This data set contains fluxes of carbon dioxide (C02) at the BOReal Ecosystem-Atmosphere Study

(BOREAS) Northern Study Area (NSA) Old Black Spruce (OBS) site measured using automated

chambers. In addition to reporting the CO2 flux, it reports chamber air temperature, moss temperature,

and light levels during each measurement. The data set covers the period from 23-Sep-1995 through

26-Oct- 1995 and from 28-May- 1996 through 21-Oct- 1996. The data are stored in tabular American

Standard Code for Information Interchange (ASCII) files.

Page 1
1.3 Objective/Purpose

Black spruce forests with a continuous carpet of feather moss in shaded dry areas and sphagnum

moss in open wet areas dominate much of the North American boreal zone. The exchange of CO2

between these forests and the atmosphere is complex, with important contributions by five

physiological processes: black spruce photosynthesis, black spruce respiration, moss photosynthesis,

moss respiration, and heterotrophic respiration. Information on the rates of and controls on each of

these processes is needed to improve understanding of the current and future carbon balance of boreal

forests. An automated, multiplexing gas-exchange system was used to make continuous, unattended

measurements of the net exchange of CO2 at the moss surface at the NSA-OBS site.

1.4 Summary of Parameters

The primary focus is on the net fluxes of CO2 measured. The data set also includes chamber air

temperature, moss temperature, and light levels during each measurement.

1.5 Discussion

Measurements were made at the NSA-OBS site. The system operated continuously and was visited

every 2 weeks. The site was heterogeneous with large changes in vegetation over small gradients in

elevation. Upland areas were dominated by dense, 10-m-tall, 120-year-old black spruce, with a minor

shrub layer and continuous feather moss. Lower areas were dominated by sparse, 1- to 6-m-tall spruce

and continuous sphagnum moss. For 1994, chambers 1-3 were placed in an upland area of

well-developed feather moss, while chambers 8-10 were placed in a lower area dominated by

sphagnum moss. The other chambers were placed at intermediate or lichen-covered locations.

1.6 Related Data Sets

BOREAS TGB-01/TGB-03 CH4 Chamber Flux Data over the NSA Fen

BOREAS TGB-03 Plant Species Composition Data over the NSA Fen

BOREAS TGB-01/TGB-03 NEE Data over the NSA Fen

BOREAS TGB-03 CH4 and CO2 Chamber Flux Data over NSA Upland Sites

BOREAS TGB-01 NSA CH4 and CO2 Chamber Flux Data

BOREAS TGB-01 CH4 Concentration and Flux Data from NSA Tower Sites

BOREAS TGB-01 NSA SF6 Chamber Flux Data

2. Investigator(s)

2.1 Investigator(s) Name and Title

Dr. Michael L. Goulden

University of California

Dr. Patrick M. Crill

Research Associate Professor

University of New Hampshire

2.2 Title of Investigation

Automated Measurements of C02 Exchange at the Moss Surface of a Black Spruce Forest

Page 2
2.3 Contact Information

Contact 1:

Dr. Michael L. Goulden

Earth System Science

203 Physical Sciences Research Facility

University of California

Irvine, CA 92717-3100

(714) 824-1983 (office)

(714) 824-8794 (department)

(714) 824-3256 (fax)

mgoulden@uci.edu

Contact 2:

Dr. Patrick M. Crill

Institute for the Study of Earth, Oceans, and Space

Complex Systems Research Center

University of New Hampshire

Durham, NH 03824

(603) 862-3519

(603) 862-0188 (fax)

patrick.crill@ unh.edu

Contact 3:

Jeffrey A. Newcomer

Raytheon ITSS

Code 923

NASA GSFC

Greenbelt, MD 20771

(301) 286-7858

(301) 286-0239 (fax)

Jeffrey.Newcomer@ gsfc.nasa.gov

3. Theory of Measurements

Net exchange of C02 above the moss surface reflects the sum of moss photosynthesis and moss, root,

and heterotrophic respiration during daylight, and moss, root, and heterotrophic respiration at night.

Long-term in situ measurements of CO2 exchange over diel courses should allow partial separation of

these processes and permit an analysis of the associated environmental controls. However,

investigations of this type have been limited by the difficulty of obtaining reliable field measurements

in remote, inclement regions.

4. Equipment

4.1 Sensor/Instrument Description

4.1.1 Collection Environment

Data were collected under all environmental conditions.

4.1.2 Source/Platform

Ground.

Page 3
4.1.3 Source/Platform Mission Objectives

Support investigators and chambers.

4.1.4 Key Variables

CO2 flux.

4.1.5 Principles of Operation

Data were recorded and the system was managed with a datalogger. The raw CO2 and H20 signals

were sampled every 2 seconds and averaged every minute. The other signals were sampled every 2

seconds and averaged every 9 minutes.

4.1.6 Sensor/Instrument Measurement Geometry

Not applicable.

4.1.7 Manufacturer of Sensor/Instrument

The chambers were 38- x 38.5- x 25-cm boxes built of clear lexan and aluminum angle.

Thermocouple

Omega Engineering

Stamford, CT

Datalogger

Campbell Scientific

Logan, UT

Infrared gas analyzer (IRGA)

IRGA, Model 6262

LI-COR, Inc

Lincoln, NE

4.2 Calibration

4.2.1 Specifications

None given.

4.2.1.1 Tolerance

None given.

4.2.2 Frequency of Calibration

Each chamber was calibrated at least once a day by standard addition. Every 21 hours, the system

added 0.08 cm3/sec of 10% CO2 to the return flow throughout a 3-hour circuit.

4.2.3 Other Calibration Information

None given.

Page 4
5. Data Acquisition Methods

Measurements were made at the NSA-OBS site. The system operated continuously and was visited

every 2 weeks. The site was heterogeneous with large changes in vegetation over small gradients in

elevation. Upland areas were dominated by dense, 10-m-tall, 120-year-old black spruce, with a minor

shrub layer and continuous feather moss. Lower areas were dominated by sparse, 1- to 6-m-tall spruce

and continuous sphagnum moss. For 1994, chambers 1-3 were placed in an upland area of

well-developed feather moss, while chambers 8-10 were placed in a lower area dominated by

sphagnum moss. The other chambers were placed at intermediate or lichen-covered locations.

Measurements of CO2 exchange above moss surfaces are sensitive to errors that are not usually

encountered when working above bare soil. Moss is extremely porous, creating uncertainty in chamber

volume and also increasing the risk of mass flow. Transient changes in moss physiology and in the

direction of CO2 movement may confound dark respiration measurements made by shading during

daytime. Because the physiological activity of moss is sensitive to water content, chambers that remain

in place for extended periods must not alter evaporation or precipitation. Finally, the CO2 exchange

above moss is complex, and therefore many measurements may be required to separate the

environmental controls on photosynthesis and respiration. As a result of these and other uncertainties,

discrepancies among methods used to measure moss-surface exchange in BOREAS have been large,

and it is unclear which, if any, chamber design provides accurate results.

The Tower Flux (TF)-03 team designed an automated gas-exchange system to circumvent most of

these problems. The system sequentially sampled 10 clear, closed-type chambers, completing a circuit

every 3 hours. Power consumption was less than 300 W at 115 VAC. The system was shipped and

operated in three weather-tight boxes that sat on the forest floor within 15 m of the chambers.

The tubing and mixing volume were flushed and allowed to equilibrate during the first 8 minutes of

each run. The selected chamber was then closed slowly, and the change in CO2 monitored for the next

10 minutes. Chamber closure had no discernible effect on the temperature within a chamber during the

fall of 1995. Subsequent measurements in midsummer 1996 revealed some warming (1-2 °C), which

occasionally resulted in condensation on the walls of chambers exposed to direct sun.

Air was drawn from the chamber throughout the run and passed through a CO2 and H20 IRGA

operated in absolute mode. The flow through the IRGA was controlled at 80 cmUsecond. The pressure

of the sample flow was measured with a pressure transducer immediately after it had exited the IRGA

and was assumed equal to the pressure in the sample cell.

Soil temperature at 5 cm beneath the moss surface and air temperature were measured in each

chamber with type-T thermocouples. Horizontal photosynthetically active photon flux density (PPFD)

was measured at each chamber with a gallium arsenide phosphide photodiode.

Data were recorded and the system managed with a datalogger. The raw CO2 and H20 signals

were sampled every 2 seconds and averaged every minute. The other signals were sampled every 2

seconds and averaged every 9 minutes. The solenoids used for chamber selection, chamber closure,

and calibration were controlled with a pair of 16-channel control modules. The set points for the mass

flow controllers were provided by a four-channel analog output module. The signals from the

thermocouples and light sensors were multiplexed with a thermally insulated 32-channel multiplexer.

The data were transferred to a storage module every 3 hours and subsequently transferred to a

computer every 2 weeks.

6.1 Data Notes

None given.

6.2 Field Notes

None given.

6. Observations

Page 5
7. Data Description

7.1 Spatial Characteristics

7.1.1 Spatial Coverage

All measurements were made at the NSA-OBS site. The North American Datum of 1983 (NAD83)

coordinates at the site are 55.8798 ° N, 98.4848 ° W.

7.1.2 Spatial Coverage Map

Not available.

7.1.3 Spatial Resolution

These are point measurements made at the given locations.

7.1.4 Projection

Not applicable.

7.1.5 Grid Description

Not applicable.

7.2 Temporal Characteristics

7.2.1 Temporal Coverage

The data set covers the period from 23-Sep-1995 through 26-Oct-1995 and from 28-May-1996

through 21-Oct- 1996.

7.2.2 Temporal Coverage Map

Not available.

7.2.3 Temporal Resolution

The CO2 and H20 signals were sampled every 2 seconds and averaged every minute.

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

CHAMBER NUM

CO2 FLUX

CALIBRATION

MOSS TEMP

AIR TEMP

DOWN PPFD CHAMBER

REVISION DATE

CRTFCN CODE

Page 6
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

CHAMBER NUM

CO2 FLUX

CALIBRATION

MOSS TEMP

AIR TEMP

DOWN PPFD CHAMBER

REVISION DATE

CRTFCN CODE

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) when the data were

collected.

Identifier assigned to the chamber measured.

Carbon Dioxide flux.

Binary code to indicate whether the system is

calibrating. If a 1 is present then the system

is calibrating.

Temperature of the moss within the chamber.

The air temperature.

The incoming photosynthetic photon flux density

measured in the chamber.

The most recent date when the information in the

referenced data base table record was revised.

The BOREAS certification level of the data.

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

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

but questionable).

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

CHAMBER NUM

CO2 FLUX

CALIBRATION

MOSS TEMP

AIR TEMP

DOWN PPFD CHAMBER

REVISION DATE

CRTFCN CODE

[none]

[none]

[DD-MON-YY]

[HHMM GMT]

[unitless]

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

[none]

[degrees Celsius]

[degrees Celsius]

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

[DD-MON-YY]

[none]

Page 7
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

CHAMBER NUM

CO2 FLUX

CALIBRATION

MOSS TEMP

AIR TEMP

DOWN PPFD CHAMBER

REVISION DATE

CRTFCN CODE

[Assigned by BORIS Staff]

[Assigned by BORIS Staff]

[Investigator]

[Investigator]

[Investigator]

[IRGA]

[Investigator]

[type-T thermocouples]

[type-T thermocouples]

[Investigator]

[Assigned by BORIS Staff]

[Assigned by BORIS Staff]

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 NSA-OBS-FLXTR NSA-OBS-FLXTR None None None None

SUB SITE 9TF03-FLXI0 9TF03-FLXC9 None None None None

DATE OBS 23-SEP-95 21-OCT-96 None None None None

TIME OBS 14 2356 None None None None

CHAMBER NUM 1 i0 None None None None

CO2 FLUX -26.18502 206.2905 -999 None None None

CALIBRATION 0 1 None None None None

MOSS TEMP -11.10693 51.89928 -999 None None None

AIR TEMP -12.46 46.67 -999 None None None

DOWN PPFD CHAMBER -.72 1853.657 -999 None None None

REVISION DATE 09-OCT-98 09-OCT-98 None None None None

CRTFCN CODE CPI CPI 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

Page 8
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.

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,CHAMBER NUM, CO2 FLUX,CALIBRATION,

MOSS TEMP,AIR TEMP,DOWN PPFD CHAMBER, REVISION DATE,CRTFCN CODE

'NSA-OBS-FLXTR', '9TF03-FLXI0',23-SEP-95,2356,10,5.16147,1,6.55583,8.14,

-.72,09-OCT-98, 'CPI'

'NSA-OBS-FLXTR', '9TF03-FLXI0',24-SEP-95,256,10,1.009062,0,6.74634,7.98,

-.72,09-OCT-98, 'CPI'

8. Data Organization

8.1 Data Granularity

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

measurement(s) made for a given site during a given day.

8.2 Data Format(s)

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

None given.

9.2 Data Processing Sequence

9.2.1 Processing Steps

None given

Page 9
9.2.2 Processing Changes

None given.

9.3 Calculations

9.3.1 Special Corrections/Adjustments

None given.

9.3.2 Calculated Variables

None given.

9.4 Graphs and Plots

None given.

10. Errors

10.1 Sources of Error

Measurements of CO2 exchange above moss surfaces are sensitive to errors that are not usually

encountered when working above bare soil. Moss is extremely porous, creating uncertainty in chamber

volume and also increasing the risk of mass flow. Transient changes in moss physiology and in the

direction of CO2 movement may confound dark respiration measurements made by shading during

daytime. Because the physiological activity of moss is sensitive to water content, chambers that remain

in place for extended periods must not alter evaporation or precipitation. Finally, the CO2 exchange

above moss is complex, and therefore many measurements may be required to separate the

environmental controls on photosynthesis and respiration. As a result of these and other uncertainties,

discrepancies among methods used to measure moss-surface exchange in BOREAS have been large,

and it is unclear which, if any, chamber design provides accurate results.

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 for general consistency and clarity.

11.1 Limitations of the Data

None given.

11.2 Known Problems with the Data

See Section 10.1.

11. Notes

Page 10
11.3 Usage Guidance

See Section 10.1.

11.4 Other Relevant Information

None given.

None given.

12. Application of the Data Set

None given.

13. Future Modifications and Plans

14.1 Software Description

None given.

14.2 Software Access

Not applicable.

14. Software

15. Data Access

The NSA-OBS automated chamber CO2 flux 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

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.

Page 11
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 given.

17.2 Journal Articles and Study Reports

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).

Sellers, P., F. Hall, H. Margolis, B. Kelly, D. Baldocchi, G. den Hartog, J. Cihlar, M.G. Ryan, B.

Goodison, P. Crill, K.J. Ranson, D. Lettenmaier, and D.E. Wickland. 1995. The boreal

ecosystem-atmosphere study (BOREAS): an overview and early results from the 1994 field year.

Bulletin of the American Meteorological Society. 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, and F.E. Guertin. 1997. BOREAS

in 1997: Experiment Overview, Scientific Results and Future Directions. Journal of Geophysical

Research 102(D24): 28,731-28,770.

17.3 Arehive/DBMS Usage Documentation

None.

Page 12
None.

18. Glossary of Terms

ASCII

BOREAS

BORIS

CD-ROM

DAAC

EOS

EOSDIS

GIS

GMT

GSFC

HTML

IRGA

NAD83

NASA

NSA

OBS

ORNL

PANP

PPFD

SSA

TF

TGB

URL

19. List of Acronyms

- American Standard Code for Information Interchange

- 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

- HyperText Markup Language

- Infrared Gas Analyzer

- North American Datum of 1983

- National Aeronautics and Space Administration

- Northern Study Area

- Old Black Spruce

- Oak Ridge National Laboratory

- Prince Albert National Park

- Photosynthetically Active Photon Flux Density

- Southern Study Area

- Tower Flux

- Trace Gas Biochemistry

- Uniform Resource Locator

20. Document Information

20.1 Document Revision Date

Written: 08-Oct- 1998

Last Updated: 17-Aug- 1999

20.2 Document Review Date(s)

BORIS Review: 15-Oct- 1998

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:

Goulden, M.L. and Crill, P.M. 1997. Automated measurements of CO2 exchange at the moss

surface of a black spruce forest. Tree Physiology. 17:537-542.

Page 13
If usingdatafromtheBOREASCD-ROM series,alsoreferencethedataas:

Goulden,M.L. andP.M. Crill, "AutomatedMeasurementsof CO2ExchangeattheMossSurface

of aBlackSpruceForest."In CollectedDataof TheBorealEcosystem-AtmosphereStudy.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, andP. Sellers.CD-ROM.NASA, 2000.

Also,citetheBOREASCD-ROMsetas:

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, andP.Sellers,eds.CollectedDataof

TheBorealEcosystem-AtmosphereStudy.NASA. CD-ROM.NASA, 2000.

20.5 Document Curator

20.6 Document URL

Page 14
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-3 Automated Chamber CO 2 Flux Data from the NSA-OBS

6. AUTHOR(S)

Michael L. Goulden and Patrick M. Crill

Forrest G. Hall and Sara Conrad, 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

Vo1.196

11. SUPPLEMENTARY NOTES

M.L. Goulden: University of California, Irvine; P.M. Crill: University of New Hampshire, Durham;

Sara Conrad: DynCorp

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-3 and TGB-1 teams collected automated CO 2 chamber flux data in their efforts to

fully describe the CO 2 flux at the NSA-OBS site. This data set contains fluxes of CO 2 at the NSA-OBS

site measured using automated chambers. In addition to reporting the CO 2 flux, it reports chamber air

temperature, moss temperature, and light levels during each measurement. The data set covers the

period from 23-Sep- 1995 through 26-Oct- 1995 and from 28-May- 1996 through 21-Oct- 1996. The

data are stored in tabular ASCII files.

14. SUBJECT TERMS

BOREAS, tower flux.

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

14

16. PRICE CODE

20. LIMITATION OF ABSTRACT

UL

Standard Form 298 (Rev. 2-89)

Prescribed by ANSI Std. Z39.18

298-102