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

Summary

The BOREAS TGB-01 and TGB-03 teams collected several data sets that contributed 
to understanding the measured trace gas fluxes over sites in the NSA.  This data 
set contains NEE measurements collected with chambers at the NSA fen in 1994 and 
1996. Gas samples were extracted approximately every 7 days from chambers and 
analyzed at the NSA lab facility.  The data are provided 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 TGB-01/TGB-03 NEE Data over the NSA Fen 

1.2 Data Set Introduction

Trace Gas Biogeochemistry Teams 1 and 3 (TGB-03) took net ecosystem exchange of 
C02 (NEE) measurements at the Northern Study Area (NSA) fen site using chambers 
from early June to September 1994 and from April to late October 1996 for the 
BOReal Ecosystem -Atmosphere Study (BOREAS).  Chamber NEE measurements were 
taken at the four subsites within the fen in the NSA to determine the NEE rates 
at these locations.  The locations represent the range of plant communities, 
water chemistry, and peatland types found in northern peatlands, including bog, 
rich fen, poor fen, and collapse scar (pH ranges from 3.8 to 7.2).  Continuous 
measurements of water level and air and soil temperatures were taken to 
understand the thermal and hydrological gradients associated with each plant 
community.  Measurements were made from the period of snow melt and thaw through 
the full growing season to fall freeze up to examine the seasonal patterns of 
NEE, differences in phenology, and relative importance of vascular plants and 
bryophytes to the carbon balance.  The following is a description of the 
acquisition of data and the final data sets.

1.3 Objective/Purpose

The purpose of these measurements was to examine the range and magnitude of NEE 
between the atmosphere and the wetland plants and soils.  Continuous 
measurements of water level and air and soil temperature measurements were also 
made to understand the environmental controls on NEE.  Plant species composition 
within the NEE collars was measured to understand the differences in NEE among 
the various plant communities in the fen.

1.4 Summary of Parameters

NEE, air and water temperatures, and water levels were measured in the NSA fen.  
In addition, the plant communities for each chamber were characterized.

1.5 Discussion

NEE was measured at four subsites in the NSA fen, designated as collapse bog 
(CB), collapse fen (CF), tower fen (TF), and Zoltai fen (ZF).  Each collar 
location is further designated by a spur (1, 2, 3, or 4) along the boardwalk at 
each subsite and by the microtopography or dominant ground cover of the collar 
location: pal=palsa, hk=hummock, hw=hollow, lwn=lawn, moat=open water at the 
edge of the collapse scars, b_moss=brown moss, sph=sphagnum, and lich=lichen. 
NEE, dark CO2 flux (respiration), and photosynthesis (derived from the 
difference between NEE and respiration), photosynthetically active radiation 
(PAR) are the parameters for the NEE data files. Continuous water table and 
temperatures were recorded at each of the subsites to accompany the NEE 
measurements.  Temperatures of the air, 5-cm, 10-cm, 20-cm, and 50-cm peat depth 
were measured at each subsite.  Temperatures correspond to the collar location 
at the subsite.  In cases where the continuous data were missing, manual soil 
temperatures were recorded.  Continuous water level measurements were taken at 
each subsite and are designated by the subsite abbreviation and the number of 
the spur (e.g., CBWL1=collapse bog, water level, spur 1).  Plant species 
composition of each NEE collar was recorded as percent cover of the total collar 
area. 

The NEE data are included in four American Standard Code for Information 
Interchange (ASCII) (DOS)-delimited text files, one for each subsite: 
CB96_NEE.txt, CF96_NEE.txt, TF96_NEE.txt, and ZF96_NEE.txt.  The parameters are 
NEE, PAR, respiration, and photosynthesis.  The water table and temperature 
measurements are located in four ASCII (DOS)-delimited text files, one for each 
subsite:  CB96_WT1.txt, CF96_WT1.txt, TF96_WT1.txt, and ZF96_WT1.txt. The plant 
data for the collars at all four subsites are located in one ASCII (DOS)-
delimited text file: fen96_pla.txt.

1.6 Related Data Sets

BOREAS TGB-01 CH4 Tower Flux Data over the NSA
BOREAS TGB-01/TGB-03 Water Table and Peat Temperature Data over the NSA
BOREAS TGB-03 CH4 Chamber Flux Data over the NSA Fen  
BOREAS TGB-03 Plant Species Composition Data over the NSA Fen 

2. Investigator(s)

2.1 Investigator(s) Name and Title

Dr. Jill L. Bubier
Research Associate
University of New Hampshire

Dr. Patrick M. Crill
Research Associate Professor
University of New Hampshire

Dr. Tim R. Moore
Professor
McGill University

2.2 Title of Investigation

Magnitude and Control of Trace Gas Exchange in Boreal Ecosystems

2.3 Contact Information

Contact 1
---------
Dr. Jill L. Bubier
Institute for the Study of Earth, Oceans, and Space
Complex Systems Research Center
University of New Hampshire
Durham, NH
(603) 862-4208
(603) 862-0188 (fax)
jill.bubier@unh.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 
(603) 862-3519
(603) 862-0188 (fax)
patrick.crill@unh.edu

Contact 3
---------
Ruth K. Varner
Research Scientist
Institute for the Study of Earth, Oceans, and Space
Complex Systems Research Center
University of New Hampshire
Durham, NH 
(603) 862-2939
(603) 862-0188
ruth.kerwin@unh.edu

Contact 4
---------
Dr. Tim R. Moore
Geography Department
McGill University
Montreal, Quebec 
Canada
(514) 398-4961
(514) 398-7437 (fax)
moore@felix.geog.mcgill.ca

3. Theory of Measurements

Chamber fluxes measure the changes in mixing ratio of trace gases (CO2) in a 
closed headspace over a period of time.  This headspace is isolated from the 
atmosphere; therefore, the exchange of material between the covered soil and the 
headspace can be quantified.     

4. Equipment

4.1 Sensor/Instrument Description

NEE was quantified with a LI-COR (LI-COR, Inc., Lincoln, Nebraska) portable 
photosynthesis system (LI-6200), which includes the LI-6250 infrared gas 
analyzer (IRGA), system console with 256K memory, 9960-035 Sensor Housing,  
6000TC leaf temperature thermocouples, a Vaisala HUMICAP humidity sensor, 
quantum sensor for PAR measurements, field stand, 6000B rechargeable battery 
packs, 6200B rechargeable battery packs, LI-6020 battery charger, 6200DP 
desiccant tubes for magnesium perchlorate, 1000-90 communications software, 
6200-25 support software, and RS-232C output leads for Data Terminal Equipment 
(DTE) and Data Communication Equipment (DCE).  A wood frame backpack for 
carrying the LI-6200 and ancillary equipment to the field sites was designed and 
manufactured by George Stone at Arundo Woodworking, Hyde Park, Vermont. 

The portable climate-controlled chambers were designed by Patrick Crill, Paul 
Carroll, and Ruth Kerwin and were modeled after a chamber described in Whiting 
et al., J. Geophys. Res. 96: 13,067-13,071, 1991.  The chambers were 
manufactured at University of New Hampshire (UNH) by Ruth Kerwin and were 
constructed of clear Lexan and Teflon film to allow maximum light penetration.  
One of two chamber sizes of chambers was used depending on the height of the 
vegetation. The larger chamber covered 3660 cm2 of surface area and was 90.5 cm 
in height.  The aluminum frame was covered on three sides with 5-mil Teflon 
film.  The fourth side was constructed of a rigid polycarbonate wall (1/8 
Lexan) on which the climate control and sampling equipment were mounted.  The 
chamber top was made of 1/8 Lexan and was removable to allow equilibration of 
plant communities to ambient conditions between sampling runs.  The climate 
control system consisted of a small heat exchanger (radiator) and a cooler for 
pumping cold water. The cooler was filled with water, ice, and a battery-powered 
pump and attached to the chamber with hoses to circulate the cold water to the 
heat exchanger. Three small brushless fans circulated the air across the 
radiator, cooling the enclosed air to within 1o C of ambient air temperature 
outside the chamber.  The smaller chamber covered the same area as the larger 
chamber to fit the same collars (3660 cm2), but was half the height (45 cm).  
All four sides and top of the smaller chamber were constructed of 1/8 Lexan.  
In order to measure NEE at different light levels, shrouds of different mesh 
size were used to reduce the light entering the chamber to 1/2, 1/4, and 0 full 
light. The aluminum collars were designed by Patrick Crill and manufactured at 
UNH.  The collars were inserted into the peat in the fall of 1995 to minimize 
disturbance during the sampling period beginning in the spring of 1996.

Continuous water table measurements were made with a float and counter weight 
attached to a wheel and potentiometer mounted on a platform that rested on top 
of a wooden post anchored in the clay below the peat.  The potentiometer, which  
was wired to either a CR10 or CR7 data logger (Campbell Scientific, Inc., Logan, 
Utah),  recorded the change in water level in mV.  Wells were constructed of PVC 
tubing.   Peat temperatures were recorded with type T thermocouples (copper-
constantan) attached at four levels (5, 10, 20 and 50 cm) to wooden stakes and 
inserted into the peat during the fall of 1995.  The thermocouples were wired to 
either CR10 or CR7 dataloggers and calibrated to reference temperatures.

4.1.1 Collection Environment

The chamber fluxes were collected under all environmental conditions.  The 
calibrations and data analyses  were completed at the Heritage North Museum 
laboratory in Thompson, Manitoba.

4.1.2 Source/Platform

Ground.

4.1.3 Source/Platform Mission Objectives

The objective was to determine the plant-soil-surface exchange rates of CO2 at 
the NSA fen complex.

4.1.4 Key Variables

The key variables measured during the sampling period were NEE, PAR, air 
temperature, peat temperature at four peat depths, water table position, and 
plant species composition.

4.1.5 Principles of Operation

The LI-6200 portable photosynthesis system consists of a LI-6250 CO2 IRGA, sensor 
head, and datalogger.  The LI-6250 consists of an IRGA, a mass flow meter, and a 
pump.  It can be configured for either absolute or differential modes of 
operation by rearranging the external plumbing. The analyzer was used in 
absolute mode.  The CO2 measurement is based on the difference in intensity of 
infrared radiation passing through two gas sampling tubes: a reference tube 
contains a known amount of CO2, and a sample tube contains an unknown amount.  
Infrared radiation is transmitted through both paths, and the output of the 
analyzer is proportional to the difference in absorption between the two.  The 
lead selenide detector is cooled and regulated to -12 C by a thermoelectric 
cooler.  To keep the detector housing free of water vapor and CO2, a small 
bottle of magnesium perchlorate and soda lime is attached to the detector (LI-
COR, Inc.).

4.1.6 Sensor/Instrument Measurement Geometry

Not applicable.

4.1.7 Manufacturer of Sensor/Instrument

Manufacturer of LI-6200 portable photosynthesis system:
LI-COR, Inc.
Box 4425
4421 Superior St.
Lincoln, NR 68504  USA
(402) 467-3576
(402) 467-2819 (fax)

Manufacturer of CR10 and CR7 dataloggers:
Campbell Scientific, Inc.
815 W. 1800 N.
Logan, UT 84321-1784  USA
(801) 753-2342
(801) 750-9540 (fax)

4.2 Calibration

4.2.1 Specifications

The IRGA was calibrated against Canadian Atmospheric Environment Services (AES) 
certified primary CO2 standards acquired by the BOREAS project.  Calibration in 
absolute mode was accomplished by flowing 0-ppm CO2 through the analyzer 
(scrubbing of CO2 with soda lime) and adjusting the zero potentiometer until the 
displayed reading was 0 ppm.  Then the span was checked by flowing a known 
concentration of CO2 through the analyzer and adjusting the span potentiometer 
until the displayed reading was correct.    An AES standard of 397.3 ppm CO2 was 
used for the span calibration.   The analyzer was usually within 1-2 ppm of the 
known concentration.  The zero and span were checked twice during each 
calibration. 

4.2.1.1 Tolerance

None given.

4.2.2 Frequency of Calibration

The CO2 analyzer was calibrated on a daily basis, every morning in the Heritage 
North Museum lab before going to the field sites.  The zero was rechecked and 
calibrated several times during the day because it was sensitive to changes in 
air temperature.  

4.2.3 Other Calibration Information

Not applicable.

5. Data Acquisition Methods

NEE was calculated using the change in concentration of CO2 in the chamber 
headspace over a 2.5-minute sampling period.  The IRGA sampled every 5 seconds 
and averaged the flux rate every 30 seconds.  The CO2 flux for each sampling run 
was calculated as a mean of the five 30-second sampling intervals during the 
2.5-minute period.  The total sampling period was kept very short to minimize 
the time the plants were exposed to the chamber environment.  Temperature and 
relative humidity inside the chamber were monitored closely during each run to 
make sure that conditions did not change significantly during the sampling 
period.  For every collar, separate sampling runs were conducted under full 
light, 1/2 light, 1/4 light, and dark conditions.  Less than full light 
measurements were obtained by placing shrouds of different mesh sizes over the 
chamber.   Grab samples of air for measuring CH4 flux were taken during each 
dark run (see documentation file CH4doc.doc for BOREAS TGB-01).  

Temperature and water level were measured continuously and averaged every hour 
on the CR10 or CR7 dataloggers.  Manual measurements of air temperature, peat 
temperature, and water table position were made at the same time as the NEE 
measurements.  

Plant species composition was recorded in each collar during the height of the 
growing season in mid-July 1996.  Visual estimates of percent cover of each 
vascular plant and bryophyte species were made based on light interception of 
the canopy of each species.   Percent cover of all species totals over 100 
percent for each collar because of several layers of vegetation.  Specimens for 
each unknown species were collected in plant communities outside of the collars 
and identified in the lab at the Heritage North Museum, Thompson, Manitoba, or 
at Dr. Barry Rock's laboratory at Complex Systems Research Center, UNH, Durham, 
NH.

6. Observations

6.1 Data Notes

None given.

6.2 Field Notes

None given.

7. Data Description

7.1 Spatial Characteristics

7.1.1 Spatial Coverage

CB collars were located in a small, circular collapse scar (75 m diameter) 
almost completely surrounded by a permafrost peat plateau, behind the generator 
shed.  Three spurs were located perpendicular to the boardwalk.  Spur 1 was 
adjacent to the moat, or open water lagg area; spur 2 was in a hummock-hollow 
area; and spur 3 was in the center of the collapse scar.  In addition to the 
collars in the collapse scar, this subsite had two collars on the palsa (frozen 
peat plateau) adjacent to the collapse scar.  Collar designations were as 
follows:

CB1moat = collapse bog, spur 1, moat
CB2hk = collapse bog, spur 2, hummock
CB2hw = collapse bog, spur 2, hollow
CB3hk = collapse bog, spur 3, hummock
CBpalmoss = collapse bog, palsa, moss
Cbpallich = collapse bog, palsa, lichen

CF collars were located in a small, linear collapse feature that was east of and 
accessed from the main trail to the tower hut.  Four spurs were located 
perpendicular to the main boardwalk.  Spur 1 was located adjacent to the moat 
spur 2 was in a uniform lawn of Sphagnum riparium spur 3 was in a small treed 
ridge and spur 4 was on the far edge of the collapse scar where the influence of 
groundwater was apparent.  Collar designations were as follows:

CF1moat = collapse fen, spur 1, moat
CF2lwn = collapse fen, spur 2, lawn
CF3hka = collapse fen, spur 3, hummock (a)
CF3hkb = collapse fen, spur 3, hummock (b)
CF4b_moss = collapse fen, spur 4, brown moss
CF4sph = collapse fen, spur 4, sphagnum

TF collars were located along the boardwalk to the micrometeorological tower in 
the NSA fen.  Four spurs were located perpendicular to the main boardwalk.  Spur 
1 was just beyond the moat at the beginning of the boardwalk in a treed area of 
tamarack (Larix laricina) spur 2 was in a tall shrub zone (Betula glandulosa),  
spur 3 was in a low shrub zone just before the hut and spur 4 was just beyond 
the hut in a mixed low shrub/sedge zone.  Collar designations were as follows:

TF1hk =  tower fen, spur 1, hummock
TF2hk =  tower fen, spur 2, hummock
TF2hw =  tower fen, spur 2, hollow
TF3hk =  tower fen, spur 3, hummock
TF3hw =  tower fen, spur 3, hollow
TF4hw =  tower fen, spur 4, hollow

ZF collars were located in a sedge-dominated (Carex spp.) fen area of the 
peatland complex, north of the fen tower, and accessed from Route 391.  Three 
spurs were located perpendicular to the main boardwalk.  Spur 1 was on a treed 
ridge; spur 2 was in a shrub-dominated hummock-hollow area; and spur 3 was in a 
wet, sedge-dominated area near the edge of a palsa.  Collar designations were as 
follows:

ZF1hk = zoltai fen, spur 1, hummock
ZF2hk = zoltai fen, spur 2, hummock
ZF2hw = zoltai fen, spur 2, hollow
ZF3b_moss = zoltai fen, spur 3, brown moss
ZF3hw = zoltai fen, spur 3, hollow (Sphagnum)
ZF3hk = zoltai fen, spur 3, hummock (Sphagnum)

1994 NEE data from Lianne Bellisario:

CB1cL1 = collapsed bog, spur 1, carpet, collar 1
CB1cL2 = collapsed bog, spur 1, carpet, collar 2
CB1cL3 = collapsed bog, spur 1, carpet, collar 3
CB1cL4 = collapsed bog, spur 1, carpet, collar 4
CB1cL5 = collapsed bog, spur 1, carpet, collar 5

CF1cL1 = collapse fen, spur 1, carpet, collar 1
CF1cL2 = collapse fen, spur 1, carpet, collar 2
CF1cL3 = collapse fen, spur 1, carpet, collar 3
CF1cL4 = collapse fen, spur 1, carpet, collar 4
CF1cL5 = collapse fen, spur 1, carpet, collar 5

CF2nL1 = collapse fen, spur 2, lawn, collar 1
CF2nL2 = collapse fen, spur 2, lawn, collar 2
CF2nL3 = collapse fen, spur 2, lawn, collar 3
CF2nL4 = collapse fen, spur 2, lawn, collar 4
CF2nL5 = collapse fen, spur 2, lawn, collar 5

TF4wL1 = tower fen, spur 4, hollow, collar 1
TF4cL2 = tower fen, spur 4, carpet, collar 2
TF4cL3 = tower fen, spur 4, carpet, collar 3
TF4kL4 = tower fen, spur 4, carpet, collar 4

ZF3cL1 = zoltai fen, spur 3, carpet, collar 1
ZF3cL2 = zoltai fen, spur 3, carpet, collar 2
ZF3cL3 = zoltai fen, spur 3, carpet, collar 3
ZF3pL4 = zoltai fen, spur 3, pool, collar 4
ZF3pL5 = zoltai fen, spur 3, pool, collar 5

7.1.2 Spatial Coverage Map

None given.

7.1.3 Spatial Resolution

The 24 collars spanned the full range of hydrologic, plant community, and water 
chemistry gradients found in the larger peatland complex.  They were placed 
along those gradients at each of the four subsites to capture the spatial 
variability in CO2 fluxes.

7.1.4 Projection

Not applicable.

7.1.5 Grid Description

Not applicable.

7.2 Temporal Characteristics

7.2.1 Temporal Coverage

The chamber NEE measurements were made from 06-June-1994 to 02-September 1994 
and 15-April-1996 to 23-October-1996.  Associated water table and temperature 
measurements were recorded as well but are provided in a separate data set.

7.2.2 Temporal Coverage Map

Not applicable.

7.2.3 Temporal Resolution

The chamber NEE measurements for 15 of the collars were made approximately every 
7 days.

7.3 Data Characteristics

Data characteristics are defined in the companion data definition file 
(tgbfenne.def)

7.4 Sample Data Record

Sample data format shown in the companion data definition file (tgbfenne.def)

8. Data Organization

8.1 Data Granularity

All of the TGB-01/TGB-03 NEE Data over the NSA Fen are contained in one dataset.

8.2 Data Format(s)

The data file contains 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. Sample data records are shown in 
the companion data definition file (tgbfenne.def)

9. Data Manipulations

9.1 Formulae

None.

9.1.1 Derivation Techniques and Algorithms

Not applicable.

9.2 Data Processing Sequence

9.2.1 Processing Steps

CO2 (NEE) data were downloaded from the LI-6200 datalogger to laptop computers 
in the Heritage North Museum lab every day after returning from the field.  The 
data were entered into spreadsheets, and the average flux for the 2.5-minute 
runs were calculated.    Ancillary data that were recorded during the runs and 
included on the data sheets were number of sample runs, time interval for 
calculating flux rate, temperature of the chamber, relative humidity, and 
chamber volume.  Data on leaf measurements, stomatal conductance, stomatal 
resistance, etc., were not relevant to this study.  Temperature and water table 
data from the CR10 and CR7 dataloggers were downloaded every 3-4 days and 
entered into the spreadsheets at the lab.

9.2.2 Processing Changes

Not applicable.

9.3 Calculations

If -888 is present in the data set, it indicates that a measurement was taken, 
but was discarded for some reason.  If -999 is present, then no data were taken.

9.3.1 Special Corrections/Adjustments

Not applicable.

9.3.2 Calculated Variables

Not applicable.

9.4 Graphs and Plots

None given.

10. Errors

10.1 Sources of Error

Placing the chamber down with much force can change the pressure inside the 
chamber to other than ambient and can affect the mechanisms and processes 
producing/taking up CO2.  (Errors such as this would have been written down in 
the lab/field books and these data therefore would have been edited out.)

10.2 Quality Assessment

10.2.1 Data Validation by Source

None given.

10.2.2 Confidence Level/Accuracy Judgment

Not applicable.

10.2.3 Measurement Error for Parameters

None given.

10.2.4 Additional Quality Assessments

Not applicable.

10.2.5 Data Verification by Data Center

Data were examined for general consistency and clarity.

11. Notes

11.1 Limitations of the Data

None given.

11.2 Known Problems with the Data

None given.

11.3 Usage Guidance

Not applicable.

11.4 Other Relevant Information

Not applicable.

12. Application of the Data Set

The chamber flux data can be used in connection with the tower flux data to 
determine the CO2 exchange between the atmosphere and the peatland soils.   The 
remote sensing images, the chamber plant community data, and the chamber NEE 
data, can be used to scale the CO2 fluxes from the plot scale to wetland 
landscape.

13. Future Modifications and Plans

None.

14. Software

Not applicable.

14.1 Software Description

Not applicable.

14.2 Software Access

Not applicable.

15. Data Access

15.1 Contact Information

Ms. Beth Nelson
BOREAS Data Manager
NASA GSFC
Greenbelt, MD 
(301) 286-4005
(301) 286-0239 (fax)
Elizabeth.Nelson@gsfc.nasa.gov

15.2 Data Center Identification

See Section 15.1.

15.3 Procedures for Obtaining Data

Users may place requests by telephone, electronic mail, or fax.

15.4 Data Center Status/Plans

The TGB-01/TGB-03 NEE data are available from the Earth Observing System Data 
and Information System (EOSDIS) Oak Ridge National Laboratory (ORNL) Distributed 
Active Archive Center (DAAC). The BOREAS contact at ORNL is: 

ORNL DAAC User Services
Oak Ridge National Laboratory
(865) 241-3952
ornldaac@ornl.gov
ornl@eos.nasa.gov

16. Output Products and Availability

16.1 Tape products

None.

16.2 Film Products

None.

16.3 Other Products

Comma-separated ASCII files with text delimited by single quotes ().

17. References

17.1 Platform/Sensor/Instrument/Data Processing Documentation

Not applicable.

17.2 Journal Articles and Study Reports

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.and F. Hall. 1997. BOREAS Overview Paper. JGR Special Issue.

Sellers, P., F. Hall, and K.F. Huemmrich. 1996. Boreal Ecosystem-Atmosphere 
Study: 1994 Operations. NASA BOREAS Report (OPSDOC 94). 

Sellers, P., F. Hall, and K.F. Huemmrich. 1997. Boreal Ecosystem-Atmosphere 
Study: 1996 Operations. NASA BOREAS Report (OPSDOC 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 
earlyresults from the 1994 field year. Bulletin of the American Meteorological 
Society. 76(9):1549-1577. 

Whiting et al., 1991. J. Geophys. Res. 96: 13,067-13,071.

17.3 Archive/DBMS Usage Documentation

None.

18. Glossary of Terms

None given.

19. List of Acronyms

    AES     - Atmospheric Environment Services, Canada
    ASCII   - American Standard Code for Information Interchange
    BOREAS  - BOReal Ecosystem-Atmosphere Study
    BORIS   - BOREAS Information System
    BP      - Beaver Pond site, NSA
    CB      - Collapse Bog
    CF      - Collapse Fen
    CMDL    - Climate Monitoring and Diagnostics Laboratory
    DAAC    - Distributed Active Archive Center
    DTE     - Data Terminal Equipment
    DCE     - Data Communication Equipment
    ECD     - Electron Capture Detector
    EOS     - Earth Observing System
    EOSDIS  - EOS Data and Information System
    FID     - Flame Ionization Detector
    GC      - Gas Chromatograph
    GSFC    - Goddard Space Flight Center
    IRGA    - Infrared Gas Analyzer
    LI-6200 - LI-COR portable photosynthesis system
    NASA    - National Aeronautics and Space Administration
    NEE     - Net Ecosystem Exchange of C02
    NSA     - Northern Study Area
    OBS     - Old Black Spruce
    OJP     - Old Jack Pine
    ORNL    - Oak Ridge National Laboratory
    PANP    - Prince Albert National Park
    PAR     - Photosynthetically Active Radiation
    SSA     - Southern Study Area
    TCD     - Thermal Conductivity Detector
    TF      - Tower Fen
    TGB-03  - Trace Gas Biogeochemistry Team 3
    UNH     - University of New Hampshire
    URL     - Uniform Resource Locator
    YJP     - Young Jack Pine site, NSA
    ZF      - Zoltai fen

20. Document Information

20.1 Document Revision Date

Written:
Last updated:  05-Jun-98

20.2 Document Review Date(s)

     BORIS Review:  10-Mar-98
     Science Review:

20.3 Document

20.4 Citation

None given.

20.5 Document Curator

20.6 Document URL

Keywords
---------------
Net Ecosystem Exchange
NEE
TGB01_TGB03_NEE.doc
06/11/98