NASA/TMm2000-209891, Vol. 213

Technical Report Series on the

Boreal Ecosystem-Atmosphere Study (BOREAS)

Forrest G. Hall and Sara Conrad, Editors

Volume 213

BOREAS TF-11 Decomposition 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=20010023259 2018-05-14T14:55:13+00:00Z
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NASA/TMm2000-209891, Vol. 213

Technical Report Series on the

Boreal Ecosystem-Atmosphere Study (BOREAS)

Forrest G. Hall and Sara Conrad, Editors

Volume 213

BOREAS TF-11 Decomposition 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 Decomposition 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 decomposition rates of a standard substrate

(wheat straw) across treatments. The measurements were conducted in 1994 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 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 Decomposition Data over the SSA-Fen

1.2 Data Set Introduction

This data set contains decomposition rates of a standard substrate (wheat straw) across treatments.

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,nitrogenavailabilityorboth.Whiting andChanton(1993)

recentlyobservedthatmethaneemissionsfrom wetlandsacrosstheglobearewell relatedto net

primaryproductivity(NPP).Thismaybefor avarietyofreasons,includingenhancedplanttransport,

increasedmethanogenicsubstratesfrom rootexudates,increasedlitter inputcascadingto enhanced

substrateavailabilityfor methanogenesis, or enhancedC andN mineralizationof decomposing

residues.Previouswork by us(Valentineet al., 1994)andothershasshownthatsubstrateavailability

is akeyconstraintonmethaneproductionin wetlands.Thepresentstudywasaneffortto testwhether

substratemanipulationresultsfrom laboratorystudiescouldbemirroredunderfield conditions.

1.4 Summary of Parameters

Wereportthemasslossof a standardplantmaterial(wheatstraw)overthecourseof N50daysasa

functionof treatmentandlocation.We alsoreporttheinitial andfinal concentrationsof carbonand

nitrogen(massbasis).

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).

1.6 Related Data Sets

BOREASTE-06BiomassEstimateData

BOREASTE-18BiomassDensityImageof theSSA

BOREASTGB-03PlantSpeciesCompositionDataovertheNSA-Fen

2. Investigator(s)

2.1 Investigator(s) Name and Title

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. III. Standard Litter Decomposition

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

Litter bags were constructed from fiberglass screen to hold N3 g of plant material. Once filled with

wheat straw and weighed, they were placed within each of the treatment/location replicates and allowed

to remain for N50 days. They were then collected and reweighed, and the fraction of the original

weight remaining is reported in the accompanying file.

4. Equipment

4.1 Sensor/Instrument Description

Not applicable.

4.1.1 Collection Environment

The litter bags were set out around the end of July (21-Jul or 02-Aug-1994), then retrieved on

17-Sep- 1994. Half the bags were placed on the surface of the peat, and half were inserted 0.1 m below

the surface.

4.1.2 Source/Platform

Not applicable.

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. One possible mechanism by which enhanced NPP or other

factors may result in higher CH4 emissions is through enhanced decomposition rates, perhaps

indexing a more rapid substrate supply rate from fermentative processes. We therefore wanted to

evaluate whether enhanced litter decomposition rates (i.e., mass loss) covaried with CIq< emissions

rates or varied as a function of our C and N additions.

Page 3
4.1.4 Key Variables

Name Unit Description

FRAC Not applicable Fraction of wheat straw mass

C Not applicable C fraction of wheat straw

H Not applicable H fraction of wheat straw

N Not applicable N fraction of wheat straw

4.1.5 Principles of Operation

Not applicable.

4.1.6 Sensor/Instrument Measurement Geometry

Not applicable.

4.1.7 Manufacturer of Sensor/Instrument

Not applicable.

4.2 Calibration

4.2.1 Specifications

Not applicable.

4.2.1.1 Tolerance

Not applicable.

4.2.2 Frequency of Calibration

Not applicable.

4.2.3 Other Calibration Information

Not applicable.

remaining

5. Data Acquisition Methods

Approximately 3 g of wheat straw was sealed into each fiberglass mesh screen. Oven dry equivalent

weights for each were determined based on additional subsamples. Two replicate bags for each

treatment/platform combination were either laid on the surface or inserted 0.1 m into the peat near the

end of July, then collected in mid-September. Each bag was oven-dried at 30 °C for 48 h, then

weighed. Subsamples were ground and analyzed using a Leco CHN analyzer for C, H, and N

concentrations.

Subsamples from the initial (undecomposed) wheat straw were similarly analyzed for C, H, and N

concentrations:

C ADDED,N ADDED, DURATION, REPLICATE ID,LITTER MASS FRACTION, C CONC,H CONC,N CONC

Initial, 0, 0, 0, 0, 0, i, .446, .061, .005

6. Observations

6.1 Data Notes

Vegetative growth lifted some of the bags off the peat surface during the decomposition period,

and the resultant drying likely retarded those.

6.2 Field Notes

None.

Page 4
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.

7.1.3 Spatial Resolution

The data are from 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

Litter bags were placed either on 21-Jul-1994 (north transect) or 02-Aug-1994 (south transect). All

bags were collected on 17-Sep-1994.

7.2.2 Temporal Coverage Map

None.

7.2.3 Temporal Resolution

Ideally, the litter bags would have been placed at the beginning of the growing season. Because of

a miscommunication from the Principal Investigator (PI) to the field crew, the bags were not placed

until much later than optimal.

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

PEAT DEPTH

C ADDED

N ADDED

DURATION

REPLICATE ID

LITTER MASS FRACTION

C CONC

H CONC

Page 5
N CONC

S_TE COMMENTS

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 NAHE

SUB SITE

START OBS DATE

END OBS DATE

PEAT DEPTH

C ADDED

N ADDED

DURATION

REPLICATE ID

LITTER MASS FRACTION

C CONC

H CONC

N CONC

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.

The depth below the peat surface.

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.

Duration of time that the samples were in the

field since 21-JUL-94 or 02-AUG-94.

Replicate id, where 2 denotes a replicate.

Fraction of original litter mass remaining.

Carbon concentration of remaining littermass

Hydrogen concentration of remaining littermass

Nitrogen concentration of remaining littermass

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.

Page 6
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 [none]

SUB SITE [none]

START OBS DATE [none]

END OBS DATE [none]

PEAT DEPTH [millimeters]

C ADDED [grams C] [meter^-2]

N ADDED [grams C] [meter^-2]

DURATION [days]

REPLICATE ID [unitless]

LITTER MASS FRACTION [unitless]

C CONC [grams C] [grams

H CONC [grams H] [grams

N CONC [grams N] [grams

S_TE COMMENTS [none]

CRTFCN CODE [none]

REVISION DATE [DD-MON-YY]

litter^-l]

litter^-l]

litter^-l]

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 [Assigned by BORIS Staff]

SUB SITE [Assigned by BORIS Staff]

START OBS DATE [Investigator]

END OBS DATE [Investigator]

PEAT DEPTH [Investigator]

C ADDED [Investigator]

N ADDED [Investigator]

DURATION [Investigator]

REPLICATE ID [Investigator]

LITTER MASS FRACTION [Balance]

C CONC [Leco CHN analyzer]

H CONC [Leco CHN analyzer]

N CONC [Leco CHN analyzer]

SITE COMMENTS [Investigator]

CRTFCN CODE [Assigned by BORIS Staff]

REVISION DATE [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-DEC01 9TFII-DEC07 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

Page 7
PEAT DEPTH 0

C ADDED 0

N ADDED 0

DURATION 46

REPLICATE ID 1

LITTER MASS FRACTION .64

m m

C CONC .361

H CONC .05

N CONC .OO2

SITE COMMENTS N/A

CRTFCN CODE CPI

REVISION DATE 01-OCT-98

i00 None None None None

300 None None None None

6 None None None None

58 None None None None

2 None None None None

1.14 None None None None

.469 None None None None

.063 None None None None

.008 None None None None

N/A None None None None

CPI None None None None

01-OCT-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

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.

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,PEAT DEPTH,C ADDED,N ADDED,

DURATION, REPLICATE ID,LITTER MASS FRACTION, C CONC,H CONC,N CONC,SITE COMMENTS,

CRTFCN CODE,REVISION DATE

'SSA-FEN-FLXTR', '9TFII-DECOI',21-JUL-94,17-SEP-94,0,300,6,58,1, .87, .446, .061,

.002, 'North of Tower, along transect A', 'CPI',01-OCT-98

Page 8
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.

9. Data Manipulations

9.1 Formulae

Not applicable.

9.1.1 Derivation Techniques and Algorithms

None.

9.2 Data Processing Sequence

9.2.1 Processing Steps

None.

9.2.2 Processing Changes

None.

9.3 Calculations

9.3.1 Special Corrections/Adjustments

None.

9.3.2 Calculated Variables

Not applicable.

9.4 Graphs and Plots

None.

10. Errors

10.1 Sources of Error

The most obvious source of error was the tendency for the litter bags to be lifted above the peat

surface by vegetative growth, potentially retarding decomposition through excessive drying. Other

sources of error include solubilization of straw constituents resulting in overstatement of

decomposition rate, exclusion of soil fauna by the bag screen itself, and moss or other growth in the

bag causing a mass gain during the period.

Page 9
10.2 Quality Assessment

10.2.1 Data Validation by Source

Not applicable.

10.2.2 Confidence Level/Accuracy Judgment

Except for the bags that gained weight during the decomposition period, these data appear fairly

robust. The aforementioned gainers should be deleted prior to analysis.

10.2.3 Measurement Error for Parameters

Not applicable.

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 CH 4 emissions?

None.

14.1 Software Description

13. Future Modifications and Plans

14. Software

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

14.2 Software Access

Not applicable.

Page 10
15. Data Access

The decomposition 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.

16.1 Tape Products

None.

16. Output Products and Availability

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

PI

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

- Principal Investigator

- 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: 06-Aug- 1999

20.2 Document Review Date(s)

BORIS Review: 08-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. III. Standard litter

decomposition.

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. III. Standard Litter Decomposition." 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.

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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

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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

November 2000 Technical Memorandum

4. TITLE AND SUBTITLE

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

BOREAS TF- 11 Decomposition 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. 213

11. SUPPLEMENTARY NOTES

D.W. Valentine: University of Alaska, Fairbanks; 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-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 decomposition rates of a standard substrate

(wheat straw) across treatments. The measurements were conducted in 1994 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 TF- 11 tower. The data are stored in tabular ASCII files.

14. SUBJECT TERMS

BOREAS, tower flux, decomposition 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

14

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UL

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