NASA/TMm2000-209891, Vol. 214

Technical Report Series on the

Boreal Ecosystem-Atmosphere Study (BOREAS)

Forrest G. Hall and David E. Knapp, Editors

Volume 214

BOREAS TF-11 SSA-Fen 1995

Leaf Area Index Data

Timothy J. Arkebauer

University of Nebraska-Lincoln

National Aeronautics and

Space Administration

Goddard Space Flight Center

Greenbelt, Maryland 20771

November 2000

https://ntrs.nasa.gov/search.jsp?R=20010022737 2018-05-14T18:59:28+00:00Z
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NASA/TMm2000-209891, Vol. 214

Technical Report Series on the

Boreal Ecosystem-Atmosphere Study (BOREAS)

Forrest G. Hall and David E. Knapp, Editors

Volume 214

BOREAS TF-11 SSA-Fen 1995

Leaf Area Index Data

Timothy J. Arkebauer

University of Nebraska-Lincoln

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 SSA-Fen 1995 Leaf Area Index Data

Timothy J. Arkebauer

Summary

The BOREAS TF-11 team gathered a variety of data to complement its tower flux measurements

collected at the SSA-Fen site. These data are LAI measurements made by the TF- 11 team throughout

the 1995 growing season. The data include the LAI of plants that fall into six categories: total, Carex

spp., Betula pumila, Menyanthes trifoliata, Salix spp., and other vascular plants. 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 SSA-Fen 1995 Leaf Area Index Data

1.2 Data Set Introduction

These data are Leaf Area Index (LAI) measurements made by the Tower Flux (TF)- 11 team at the

BOReal Ecosystem-Atmosphere Study (BOREAS) Southern Study Area (SSA)-Fen site throughout

the 1995 growing season. These data include the LAI of plants that fall into six categories: total, Carex

spp., Betula pumila, Menyanthes trifoliata, Salix spp., and other vascular plants.

1.3 Objective/Purpose

The objective of this study was to quantify the distribution of green LAI during the growing season

for the various plant species in the SSA-Fen.

Page 1
1.4 Summary of Parameters

Each data record includes the date and the LAI in each of six categories: total, Carex spp., Betula

pumila, Menyanthes trifoliata, Salix spp., and other vascular plants.

1.5 Discussion

The overall project goal was to investigate the surface-atmosphere exchange of carbon dioxide and

methane, and the associated energy fluxes at the SSA-Fen site. The LAI data were collected in support

of the various components of the overall project.

1.6 Related Data Sets

BOREAS TF- 11 SSA-Fen Tower Flux and Meteorological Data

BOREAS TF-11 SSA-Fen 1996 Water Surface Film Capping Data

BOREAS TF-11 SSA-Fen Leaf Gas Exchange Data

BOREAS TF-11 SSA-Fen Soil Surface CO2 Flux Data

2. Investigator(s)

2.1 Investigator(s) Name and Title

Dr. Timothy J. Arkebauer, Associate Professor

Department of Agronomy

University of Nebraska-Lincoln

Dr. Shashi B. Verma, Professor

Department of Agricultural Meteorology

University of Nebraska-Lincoln

2.2 Title of Investigation

Field Micrometeorological Measurements, Process-Level Studies and Modeling of Methane and

Carbon Dioxide Fluxes in a Boreal Wetland Ecosystem (SSA-Fen)

2.3 Contact Information

Contact 1:

Dr. Timothy J. Arkebauer

Department of Agronomy

106 KCR Building

University of Nebraska

Lincoln, NE 68583-0817 USA

(402) 472-2847

(402) 472-3654 (fax)

tja@unlinfo.unl.edu

Contact 2:

David Knapp

Raytheon ITSS

NASA GSFC

Code 923

Greenbelt, MD 20771

(301) 286-1424

(301) 286-0239 (fax)

David.Knapp@ gsfc.nasa.gov

Page 2
3. Theory of Measurements

LAI is the total leaf area per unit ground area. For broadleaf species, the leaf area is taken as one half

the total surface area of the leaf, i.e., the area projected normal to the plane of the leaf.

4. Equipment

4.1 Instrument Description

A LI-COR LI-3100 leaf area meter was used to determine the leaf area of the samples.

4.1.1 Collection Environment

Samples were collected at the SSA-Fen site in ambient conditions from May to September 1995.

4.1.2 Source/Platform

None given.

4.1.3 Source/Platform Mission Objectives

None given.

4.1.4 Key Variables

Date, LAI for the following categories: total vascular plants, Carex spp., Betula pumila,

Menyanthes trifoliata, Salix spp., and other vascular plants.

4.1.5 Principles of Operation

None given.

4.1.6 Sensor/Instrument Measurement Geometry

None given.

4.1.7 Manufacturer of Instrument

LI-COR, Inc.

P.O. Box 4425

4421 Superior Street

Lincoln, NE 68504 USA

(402) 467-3576

(402) 467-2819 (fax)

4.2 Calibration

None given.

4.2.1 Specifications

The LI-3100 was operated and maintained in accordance with the manufacturer's instructions.

4.2.1.1 Tolerance

None given.

4.2.2 Frequency of Calibration

None given.

4.2.3 Other Calibration Information

None.

Page 3
5. Data Acquisition Methods

A sampling area was chosen that had vegetation characteristics similar to the eddy correlation

instrumentation "footprint." This area was located several hundred meters south of the main eddy

correlation boardwalk.

A transect approximately 200 m long was laid out in an east-west direction. The transect was

divided into four 50-m-long subtransects, giving a total of 20 samples. On each sampling date, five

locations were chosen at random along each of the four subtransects giving a total of 20 samples. All

the vegetation above the surface of a 0.25 m2 area at each location was harvested. Samples were placed

in plastic ziplock bags and transported to the leaf area meter.

For each sample, green leaves were separated from stems and dead material. Leaf area of each of

the following categories was determined: Carex spp., Betula pumila, Menyanthes trifoliata, Salix spp.,

and other vascular plants.

6. Observations

6.1 Data Notes

None.

6.2 Field Notes

A limited set of field notes and observations is available by request from T.J. Arkebaner (see

Section 2.3).

7. Data Description

7.1 Spatial Characteristics

7.1.1 Spatial Coverage

All of the data were collected in the vicinity of the SSA-Fen flux tower site. This tower is located at

the following North American Datum of 1983 (NAD83) coordinates:

Latitude Longitude BOREAS X BOREAS Y UTM Northing UTM Easting

53.80206°N i04.61798°W 419.527 330.991 5961566.6 525159.8

7.1.2 Spatial Coverage Map

None given.

7.1.3 Spatial Resolution

Each sample was from a 0.25 m2 area. There were 20 samples for each day on which

measurements were taken. See Section 5 for details.

7.1.4 Projection

None given.

7.1.5 Grid Description

None given.

7.2 Temporal Characteristics

Page 4
7.2.1 Temporal Coverage

Measurements were made on 20-May, 02-Jun, 22-Jun, 28-Jul, 17-Aug, 08-Sep, and

29-Sep- 1995.

7.2.2 Temporal Coverage Map

None.

7.2.3 Temporal Resolution

These data were collected on particular days. See Section 7.2.1.

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

MEAN TOTAL LAI

STD ERR TOTAL LAI

SEDGE LAI

BOGBIRCH LAI

MENYANTHES LAI

SALIX LAI

OTHER LAI

CRTFCN CODE

REVISION DATE

7.3.2 Variable Deseription/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

MEAN TOTAL LAI

STD ERR TOTAL LAI

SEDGE LAI

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 total vascular plant mean green Leaf Area

Index (mean of 20 samples).

The standard error of the total vascular plant

mean green Leaf Area Index.

The Leaf Area Index for all Carex species.

Page 5
BOGBIRCH LAI

MENYANTHES LAI

SALIX LAI

OTHER LAI

CRTFCN CODE

REVISION DATE

The Leaf Area Index of Betula Pumila.

The Leaf Area Index for Menyanthes trifoliata.

The Leaf Area Index for Salix species.

The Leaf Area Index for all other vascular plant

species.

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 [none]

SUB SITE [none]

DATE OBS [DD-MON-YY]

MEAN TOTAL LAI [unitless]

STD ERR TOTAL LAI [unitless]

SEDGE LAI [unitless]

BOGBIRCH LAI [unitless]

MENYANTHES LAI [unitless]

SALIX LAI [unitless]

OTHER LAI [unitless]

CRTFCN CODE [none]

REVISION DATE [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

DATE OBS

MEAN TOTAL LAI

STD ERR TOTAL LAI

SEDGE LAI

BOGBIRCH LAI

MENYANTHES LAI

SALIX LAI

OTHER LAI

CRTFCN CODE

REVISION DATE

[Assigned by BORIS.]

[Assigned by BORIS.]

[Supplied by Investigator.]

[Supplied by Investigator.]

[Supplied by Investigator.]

[Supplied by Investigator.]

[Supplied by Investigator.]

[Supplied by Investigator.]

[Supplied by Investigator.]

[Supplied by Investigator.]

[Assigned by BORIS.]

[Assigned by BORIS.]

Page 6
7.3.5 Data Range

Thefollowingtablegivesinformationabouttheparametervaluesfoundin thedatafiles onthe

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-LAI01 9TFII-LAI01 None None None None

DATE OBS 20-MAY-95 29-SEP-95 None None None None

MEAN TOTAL LAI .088 1.281 None None None None

STD ERR TOTAL LAI .016 .083 None None None None

SEDGE LAI .041 .286 None None None None

BOGBIRCH LAI 0 .346 None None None None

MENYANTHES LAI 0 .409 None None None None

SALIX LAI .001 .153 None None None None

OTHER LAI .017 .152 None None None None

CRTFCN CODE CPI CPI None None None None

REVISION DATE 29-MAR-99 29-MAR-99 None None None None

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

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

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

indicate that an attempt was made to determine the

parameter value, but the attempt was unsuccessful.

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

to indicate an attempt was made to determine the

parameter value, but the value was deemed to be

unreliable by the analysis personnel.

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

instruments detection limits. This is used to

indicate that an attempt was made to determine the

parameter value, but the analysis personnel determined

that the parameter value was below the detection

limit of the instrumentation.

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

determine the parameter value. This usually

indicates that BORIS combined several similar but

not identical data sets into the same data base table

but this particular science team did not

measure that parameter.

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

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

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

7.4 Sample Data Record

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

SITE NAME,SUB SITE,DATE OBS,MEAN TOTAL LAI,STD ERR TOTAL LAI,SEDGE LAI,

BOGB_RCH LAI,MENYANTHES--LAI,SALIX LAI,OTHER LA_,CRTFCN CODE REVISION DATE

'SSA-FEN-FLXTR', '9TFII-LAI01',20-MAY-95, .088, .016, .041, .001 0.0, .011, .036, 'CPI',

29-MAR-99

'SSA-FEN-FLXTR', '9TFII-LAI01',02-JUN-95, .471, .051, .i14, .208 .054, .077, .017, 'CPI',

29-MAR-99

Page 7
8. Data Organization

8.1 Data Granularity

The smallest amount of data that can be ordered from this data set is the entire set of data.

8.2 Data Format

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

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

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

the fields.

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

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

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

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

contain the actual data.

9. Data Manipulations

9.1 Formulae

None given.

9.1.1 Derivation Techniques and Algorithms

None.

9.2 Data Processing Sequence

None given.

9.2.1 Processing Steps

• The BOREAS Information System (BORIS) received data from TF-11.

• BORIS standardized the units and loaded data into the data base.

• BORIS extracted data from data base into ASCII files.

9.2.2 Processing Changes

None.

9.3 Calculations

None.

9.3.1 Special Corrections/Adjustments

None.

9.3.2 Calculated Variables

None.

9.4 Graphs and Plots

None.

Page 8
10. Errors

10.1 Sources of Error

None given.

10.2 Quality Assessment

None given.

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 Assessment

None given.

10.2.5 Data Validation by Data Center

BORIS staff loaded the data into the data base and checked for any inconsistencies during loading.

11. Notes

11.1 Limitations of the Data

None given.

11.2 Known Problems with the Data

No problems are known to exist. However, it should noted that there are significant numbers of

nonvascular plants (e.g., green and brown mosses, lichens) present in the fen that were not measured.

11.3 Usage Guidance

The normal caveat of 'use at your own risk' applies. Correspondence with T.J. Arkebauer is

encouraged when questions arise or if additional data set details are required.

11.4 Other Relevant Information

Dr. Evan C. Jolitz was responsible for most of the day-to-day coordination of the field

measurements, and Ms. Marlene McCloud aided in the LAI measurements. Their assistance is greatly

appreciated.

In 1994 an indirect technique (LI-COR LAI-2000 Plant Canopy Analyzer) was used to estimate the

total LAI at the fen site. However, for a number of reasons, these values are regarded as unreliable.

Those interested in the details are urged to correspond with T.J. Arkebaner (see Section 2.3).

12. Application of the Data Set

These data can be used as estimates of LAI at a typical fen in the boreal forest.

None.

13. Future Modifications and Plans

Page 9
14.1 Software Description

None given.

14.2 Software Access

None given.

14. Software

15. Data Access

The SSA-Fen 1995 LAI 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 10
17. References

17.1 Platform/Sensor/Instrument/Data Processing Documentation

None.

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. Ransom 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.

Suyker, A.E., S.B. Verma, and T.J. Arkebauer. 1997. Season-long measurement of carbon dioxide

exchange in a boreal fen. Journal of Geophysical Research 102 (D24): 29,021-29,028.

17.3 Arehive/DBMS Usage Documentation

None.

None.

18. Glossary of Terms

ASCII

BOREAS

BORIS

CD-ROM

DAAC

EOS

EOSDIS

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

Page 11
GIS

GMT

GSFC

IFC

LAI

NAD83

NASA

NSA

ORNL

PANP

SSA

TF

URL

UTM

- Geographic Information System

- Greenwich Mean Time

- Goddard Space Flight Center

- Intensive Field Campaign

- Leaf Area Index

- North American Datum of 1983

- National Aeronautics and Space

- Northern Study Area

- Oak Ridge National Laboratory

- Prince Albert National Park

- Southern Study Area

- Tower Flux

- Uniform Resource Locator

- Universal Transverse Mercator

Administration

20. Document Information

20.1 Document Revision Date of This Document

Written: 30-Jun- 1997

Last Revised: 12-Sep- 1999

20.2 Document Review Date(s)

BORIS Review: 19-Apr- 1999

Science Review:

20.3 Document ID

20.4 Citation

When using these data, please acknowledge T.J. Arkebauer and E.C. Jolitz and include citations of

relevant papers in Section 17.2.

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

Arkebauer, T.J. and S.B. Verma, "Field Micrometeorological Measurements, Process-Level

Studies and Modeling of Methane and Carbon Dioxide Fluxes in a Boreal Wetland Ecosystem

(SSA-Fen)." In Collected Data of The Boreal Ecosystem-Atmosphere Study. Eds. J. Newcomer, D.

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

Rinker, R. Strub, T. Twine, F. Hall, and P. Sellers. CD-ROM. NASA, 2000.

Also, cite the BOREAS CD-ROM set as:

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

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

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

20.5 Document Curator

20.6 Document URL

Page 12
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 SSA-Fen 1995 Leaf Area Index Data

6. AUTHOR(S)

Timothy J. Arkebauer

Forrest G. Hall and David E. Knapp, 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. 214

11. SUPPLEMENTARY NOTES

T.J. Arkebauer: University of Nebraska-Lincoln;

D.E. Knapp: Raytheon ITSS, NASA Goddard Space Flight Center, Greenbelt, Maryland

12a. DISTRIBUTION / AVAILABILITY STATEMENT

Unclassifie_Unlimited

Subject Category: 43

Report available from the NASA Center for AeroSpace Information,

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

12b. DISTRIBUTION CODE

13. ABSTRACT (Maximum 200 words)

The BOREAS TF-11 team gathered a variety of data to complement its tower flux measurements

collected at the SSA-Fen site. These data are LAI measurements made by the TF-11 team throughout

the 1995 growing season. The data include the LAI of plants that fall into six categories: total, Carex

spp., Betula pumila, Menyanthes trifoliata, Salix spp., and other vascular plants. The data are stored in

tabular ASCII files.

14. SUBJECT TERMS

BOREAS, tower flux, leaf area index 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

12

16. PRICE CODE

20. LIMITATION OF ABSTRACT

UL

Standard Form 298 (Rev. 2-89)

Prescribed by ANSI Std. Z39.18

298-102