NASA/TMm2000-209891, Vol. 210

Technical Report Series on the

Boreal Ecosystem-Atmosphere Study (BOREAS)

Forrest G. Hall and Sara Conrad, Editors

Volume 210

BOREAS TF-11 Biomass Data

over the SSA-Fen

David W. Valentine

University of Alaska, Fairbanks

National Aeronautics and

Space Administration

Goddard Space Flight Center

Greenbelt, Maryland 20771

November 2000

https://ntrs.nasa.gov/search.jsp?R=20010022904 2018-05-14T18:58:41+00:00Z
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NASA/TMm2000-209891, Vol. 210

Technical Report Series on the

Boreal Ecosystem-Atmosphere Study (BOREAS)

Forrest G. Hall and Sara Conrad, Editors

Volume 210

BOREAS TF-11 Biomass Data

over the SSA-Fen

David W. Valentine

University of Alaska, Fairbanks

National Aeronautics and

Space Administration

Goddard Space Flight Center

Greenbelt, Maryland 20771

November 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-11 Biomass Data over the SSA-Fen

David Valentine

Summary

The BOREAS TF-11 team collected several data sets in its efforts to fully describe the flux and site

characteristics at the SSA-Fen site. This data set contains plant cover, standing crop of plant biomass,

and estimated net primary productivity at each chamber site at the end of the 1994 field season. The

measurements were conducted as part of a 2 x 2 factorial experiment in which we added carbon (300

g/m2 as wheat straw) and nitrogen (6 g/m 2 as urea) to four replicate locations in the vicinity of the

TF- 11 tower. 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-11 Biomass Data over the SSA-Fen

1.2 Data Set Introduction

This data set contains standing crop of plant biomass and estimated net primary productivity (NPP)

at each chamber site at the end of the 1994 field season. The measurements were conducted as part of a

2 x 2 factorial experiment in which we added carbon (300 g/m2 as wheat straw) and nitrogen (6 g/m2

as urea) to four replicate locations in the vicinity of the Tower Flux (TF)- 11 tower.

Page 1
1.3 Objective/Purpose

Muchof theareawithin theborealforestbiomeconsistsof wetlands,in whichlargecarbonstores

andhighwatertablesdrivefundamentallydifferentatmosphericinteractionsthanoccurundertheother

foresttypesstudiedby theBORealEcosystem-AtmosphereStudy(BOREAS).Onekeydifferenceisin

theformcarbonis emittedfollowing soilmicrobialrespiration;in wetlands,muchof it isemittedas

methane.Wetlandsarethedominantinfluenceof borealforestsonatmosphericmethane.

Thisstudywasundertakenin orderto assessresponsesof methaneemissionsin northernwetlands

to potentialchangesin plantproductivity,nitrogenavailability,orboth.Whiting andChanton(1993)

recentlyobservedthatmethaneemissionsfrom wetlandsacrosstheglobearewell relatedto NPP.This

maybefor avarietyof reasons,includingenhancedplanttransport,increasedmethanogenicsubstrates

from rootexudates,increasedlitter inputcascadingto enhancedsubstrateavailabilityfor

methanogenesis, or enhancedC andN mineralizationof decomposingresidues.Previouswork by

othersandus(Valentineet al., 1994)hasshownthatsubstrateavailabilityis akeyconstrainton

methaneproductionin wetlands.Thepresentstudywasaneffortto testwhethersubstrate

manipulationresultsfrom laboratorystudiescouldbemirroredunderfield conditions.

1.4 Summary of Parameters

Wereportthestandingcropof live plantbiomass,by growthform, clip-harvestedfrom ourflux

chambersin mid-September1994.Basedontheseandtheprocedureoutlinedby Klingeret al.(1994),

we alsoestimatedNPPby growthform.

1.5 Discussion

Thesedatawerecollectedfrom asetof smalllocationswithin thefen,andthereforenoonelocation

representedtheentirestudysite.In fact,thefenin whichthisworkwasconductedwascharacterized

by alarge-scalegradientof vegetation,microtopography,andhydrologysuchthatthestudysiteitself

is representativeonly of theportionof thefenin whichit waslocated(i.e.,thelower 1/3).

ThesedatawerecollectedatthesamesiteandoverthesametimeperiodasShashiVermaandhis

teammeasuredmethaneandcarbondioxidefluxesusingeddycorrelation.Tim Arkebauercollected

moredetaileddataonplantspeciescompositionanddominanceatthissite.

1.6 Related Data Sets

BOREASTE-06BiomassEstimateData

BOREASTE-18BiomassDensityImageof theSSA

BOREASTF-11CO2andCH4Concentrationdatafrom theSSA-Fen

BOREASTF-11CO2andCH4Flux datafrom theSSA-Fen

BOREASTGB-03PlantSpeciesCompositionDataovertheNSA-Fen

2. Investigator(s)

2.1 Investigator(s)

David Valentine

Assistant Professor

Department of Forest Sciences

P.O. Box 757200

University of Alaska

Fairbanks, AK 99775-7200

2.2 Title of Investigation

Influence of Substrate Characteristics and Other Environmental Factors on Methane Emissions

from the BOREAS Southern Study Area Fen Site: IV. Standing Crop

Page 2
2.3 Contact Information

Contact 1:

David Valentine

Department of Forest Sciences

P.O. Box 757200

University of Alaska

Fairbanks, AK 99775-7200

(907) 474-7614

(907) 474-6184 (fax)

ffdwv@ aurora, alaska.edu

Contact 2:

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

Above-ground biomass was assessed by clip-harvesting at the end of the growing season, separating

by taxonomic unit (species where possible), and weighing oven dry corrected samples. Data were

aggregated and reported by growth form.

4. Equipment

4.1 Sensor/Instrument Description

4.1.1 Collection Environment

The clip harvest occurred from 13-Sep through 16-Sep-1994, as many of the plants had begun to

senesce.

4.1.2 Source/Platform

All chamber sites were fitted with stainless steel bases cut into the surface l0 cm of peat at the

beginning of the season. All bases remained in place during the entire summer. We clipped the

vegetation contained in each base to obtain end-of-season above-ground plant biomass.

4.1.3 Source/Platform Mission Objectives

Recent papers (e.g., Whiting and Chanton, 1993) have suggested that CIq< emissions are

positively related to plant productivity. As we observed substantial variability among the chamber

bases with respect to above-ground plant biomass, we decided to harvest them to examine possible

relationships between above-ground biomass and CH4 emissions.

4.1.4 Key Variables

COVER - Fraction of area covered by taxon BIOMASS - g/m2 -Oven dry weight of growth form's

above-ground parts NPP - g/m2/y - Estimated above-ground net primary productivity

Page 3
4.1.5 Principles of Operation

None given.

4.1.6 Sensor/Instrument Measurement Geometry

None given.

4.1.7 Manufacturer of Sensor/Instrument

None given.

4.2 Calibration

4.2.1 Specifications

4.2.1.1 Tolerance

None given.

4.2.2 Frequency of Calibration

None given.

4.2.3 Other Calibration Information

None given.

5. Data Acquisition Methods

After monitoring CH4 and CO2 fluxes at a number of chamber collars through the growing season, we

estimated plant cover by eye, harvested all above-ground plant biomass at each collar, and classified it

according to growth form: moss, shrub, graminoid, and herbaceous. All samples were oven dried at

30 °C for 48 hours before weighing.

6. Observations

6.1 Data Notes

Plant identification to genus and species was not attempted because at the time of clipping,

senescence had obscured many foliar details and flowering had long past for most species.

6.2 Field Notes

None given.

7. Data Description

7.1 Spatial Characteristics

7.1.1 Spatial Coverage

All measurements were made along two transects identified by their location relative to the TF- 11

micrometeorology tower: a north transect (NA and NB platforms) and a south transect (SA and SB

platforms). All measurements were made within 70 m of the TF-11 tower, whose North American

Datum of 1983 (NAD83) coordinates are 53.80206°N, 104.61798°W.

7.1.2 Spatial Coverage Map

Not available.

Page 4
7.1.3 Spatial Resolution

These data are point measurements 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

Plant cover, biomass, and NPP data are from clip-harvests performed 13-Sep through

16-Sep-1994, covering accumulated plant biomass for the 1994 growing season (for herbaceous and

graminoid species) and previous growing seasons (for shrubs and bryophytes).

7.2.2 Temporal Coverage Map

None.

7.2.3 Temporal Resolution

One's objective determines when above-ground biomass should be collected. Peak biomass is

collected when biomass is largest, and is useful in relating to peak CI_ or CO2 flux rates.

End-of-season biomass is collected at senescence, and is useful for estimating likely litter inputs to the

ecosystem. We were constrained by our need to monitor CH4 fluxes at the sites where ultimately

above-ground biomass would also be determined.

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

START OBS DATE

END OBS DATE

C ADDED

N ADDED

COVER TYPE

AREA FRACTION

DRY WEIGHT BIOMASS DENSITY

NPP

SITE COMMENTS

CRTFCN CODE

REVISION DATE

Page 5
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

START OBS DATE

END OBS DATE

C ADDED

N ADDED

COVER TYPE

AREA FRACTION

DRY WEIGHT BIOMASS DENSITY

NPP

SITE COMMENTS

CRTFCN CODE

REVISION DATE

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 and time at which collection of the

referenced data commenced.

The date and time at which collection of the

referenced data was terminated.

Estimated amount of carbon contained in the wheat

straw that was added to the plot.

Estimated amount of nitrogen contained in the

urea that was added to the plot.

The dominant species, vegetation or type of land

cover that exists at the location.

Fraction of the area covered by the given cover

type.

Oven-dried weight of the above-ground vegetation.

Estimated above-ground net primary productivity.

Descriptive information to clarify or enhance the

site information.

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.

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

START OBS DATE

END OBS DATE

C ADDED

N ADDED

COVER TYPE

AREA FRACTION

[none]

[none]

[none]

[none]

[grams C] [meter^-2]

[grams C] [meter^-2]

[none]

[unitless]

Page 6
DRY WEIGHT BIOMASS DENSITY

NPP

SITE COMMENTS

CRTFCN CODE

REVISION DATE

[grams] [meters^-2]

[grams] [meters^-2] [year^-l]

[none]

[none]

[DD-MON-YY]

7.3.4 Data Source

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

Column Name Data Source

SITE NAME

SUB SITE

START OBS DATE

END OBS DATE

C ADDED

N ADDED

COVER TYPE

AREA FRACTION

DRY WEIGHT BIOMASS DENSITY

NPP

SITE COMMENTS

CRTFCN CODE

REVISION DATE

[Assigned by BORIS Staff]

[Assigned by BORIS Staff]

[Investigator]

[Investigator]

[Investigator]

[Investigator]

[Investigator]

[Investigator]

[Balance]

[Calculated by Investigator]

[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 SSA-FEN-FLXTR SSA-FEN-FLXTR None None None None

SUB SITE 9TFII-BIO01 9TFII-BIO08 None None None None

START OBS DATE 21-JUL-94 02-AUG-94 None None None None

END OBS DATE 17-SEP-94 17-SEP-94 None None None None

C ADDED 0 300 None None None None

N ADDED 0 6 None None None None

COVER TYPE N/A N/A None None None None

AREA FRACTION 0 .55 None None None None

DRY WEIGHT BIOMASS .3 694.2 None None None None

DENSITY

NPP .i 312.8 None None None None

SITE COMMENTS N/A N/A None None None None

CRTFCN CODE CPI CPI None None None None

REVISION DATE 09-SEP-98 09-SEP-98 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

Page 7
Below Detect Limit

Data Not Cllctd

parameter value, but the value was deemed to be

unreliable by the analysis personnel.

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.

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.

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,START OBS DATE,END OBS DATE,C ADDED,N ADDED,COVER TYPE,

AREA FRACTION, DRY WEIGHT BIOMASS DENSITY,NPP,SITE COMMENTS,CRTFCN CODE,

REVISION DATE

'SSA-FEN-FLXTR', '9TFII-BIOOI',21-JUL-94,17-SEP-94,0,O, 'bryophyte', .i,3.3,2.3,

'Hummock: North of Tower, along transect A', 'CPI',09-SEP-98

'SSA-FEN-FLXTR', '9TFII-BIOOI',21-JUL-94,17-SEP-94,0,O, 'graminoid', .4,99.6,

99.6, 'Hummock: North of Tower, along transect A', 'CPI',09-SEP-98

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 on 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.

Page 8
9. Data Manipulations

9.1 Formulae

9.1.1 Derivation Techniques and Algorithms

NPP was estimated as BIOMASS * PBR, where PBR (the productivity/biomass ratio) was taken

from Klinger et al. (1994) Table 1. All graminoid and herbaceous plants and shrub leaves had a PBR

of 1.0 (i.e. all biomass was produced during the current growing season). Shrub stems were given a

PBR of 0.21 and bryophytes were given a PBR of 0.68.

9.2 Data Processing Sequence

9.2.1 Processing Steps

None given.

9.2.2 Processing Changes

None given.

9.3 Calculations

9.3.1 Special Corrections/Adjustments

None given.

9.3.2 Calculated Variables

See Section 9.1.1.

9.4 Graphs and Plots

None given.

10. Errors

10.1 Sources of Error

The largest source of error for both biomass measurements and NPP calculations is the

below-ground component. All values reported here are for above-ground parts only; the reader should

exercise care in extrapolating from these to ecosystem biomass and NPP values. The NPP estimates

are calculated based on assumed ratios of current production to biomass; although derived for boreal

ecosystems, their applicability to this site and species composition is untested. Finally, the influence of

the permanently installed chamber collars and periodically placed chambers is unknown but perhaps

important. Possible mechanisms include severance of plant roots and rhizomes by the collar placement,

greater thermal conductivity of steel into the rooting zone, and potential lensing by the chamber film

causing damage to foliage during flux measurement prior to the clip harvest.

10.2 Quality Assessment

10.2.1 Data Validation by Source

None given.

10.2.2 Confidence Level/Accuracy Judgment

The above-ground plant biomass data are fairly solid as sufficient care was exercised during the

growing season to cause minimal disturbance and during the clip harvest to sample quantitatively. For

the reasons noted in Sections 9.1 and 10.1, care should be taken in interpreting estimated NPP as it

was calculated rather than measured through sequential harvests.

Page 9
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

See Sections 9.1 and 10.1.

11.2 Known Problems with the Data

None given.

11.3 Usage Guidance

See Sections 9.1 and 10.1.

11.4 Other Relevant Information

None given.

11. Notes

12. Application of the Data Set

Several avenues are being pursued in publications now being produced to answer the following

questions:

• How do CH4 flux measurements compare by technique used in measurement?

• How and why do CH4 flux measurements vary through time and across the landscape?

• Does plant productivity limit CH4 emissions?

None given.

13. Future Modifications and Plans

14. Software

14.1 Software Description

We used only commercially available software, mostly the Quattro Pro spreadsheet.

14.2 Software Access

None given.

Page 10
15. Data Access

The biomass 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.

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.

Page 11
17. References

17.1 Platform/Sensor/Instrument/Data Processing Documentation

None.

17.2 Journal Articles and Study Reports

Klinger, L.F., P.R. Zimmerman, J.P. Greenberg, L.E. Heidt, and A.B. Guenther. 1994. Carbon

trace gas fluxes along a successional gradient in the Hudson Bay lowland. Journal of Geophysical

Research 99:1469-1494.

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.

Valentine, D.W., E.A. Holland, and D.S. Schimel. 1994. Ecosystem and physiological controls over

methane production in northern wetlands. Journal of Geophysical Research 99(D 1):1563-71.

Whiting, G.J. and J.P. Chanton. 1993. Primary production control of methane emission from

wetlands. Nature 364:794-5.

17.3 Arehive/DBMS Usage Documentation

None.

None.

18. Glossary of Terms

Page 12
ASCII

BOREAS

BORIS

CD-ROM

DAAC

EOS

EOSDIS

GIS

GSFC

HTML

NAD83

NASA

NPP

NSA

ORNL

PANP

PBR

SSA

TE

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

- Goddard Space Flight Center

- HyperText Markup Language

- North American Datum of 1983

- National Aeronautics and Space Administration

- Net Primary Productivity

- Northern Study Area

- Oak Ridge National Laboratory

- Prince Albert National Park

- Productivity/Biomass Ratio

- Southern Study Area

- Terrestrial Ecology

- Tower Flux

- Trace Gas Biogeochemistry

- Uniform Resource Locator

20. Document Information

20.1 Document Revision Date

Written: 29-Jan- 1997

Last Updated: 05-Aug- 1999

20.2 Document Review Date(s)

BORIS Review: 06-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:

Valentine, D.W. 1996. Influence of substrate characteristics and other environmental factors on

methane emissions from the BOREAS Southern Study Area fen site. IV. Above-ground plant cover,

biomass, and estimated productivity.

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

Valentine, D., "Influence of Substrate Characteristics and Other Environmental Factors on Methane

Emissions from the BOREAS Southern Study Area Fen Site: IV. Standing Crop." 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.

Page 13
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

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

November 2000 Technical Memorandum

4. TITLE AND SUBTITLE

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

BOREAS TF- 11 Biomass Data over the SSA-Fen

6. AUTHOR(S)

David W. Valentine

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

Vol. 210

11. SUPPLEMENTARY NOTES

D.W. Valentine: University of Alaska, Fairbanks; S. 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-11 team collected several data sets in its efforts to fully describe the flux and site

characteristics at the SSA-Fen site. This data set contains plant cover, standing crop of plant biomass,

and estimated net primary productivity at each chamber site at the end of the 1994 field season. The

measurements were conducted as part of a 2 x 2 factorial experiment in which we added carbon (300

g/m 2 as wheat straw) and nitrogen (6 g/m 2 as urea) to four replicate locations in the vicinity of the TF11 tower. The data are stored in tabular ASCII files.

14. SUBJECT TERMS

BOREAS, tower flux, biomass data.

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