BOREAS TE-05 Soil Respiration Data

Summary

The BOREAS group TE-05 collected measurements in the NSA and SSA on gas 
exchange, gas composition and tree growth.  Soil respiration data collected in 
the BOREAS NSA and SSA to compare the soil respiration rates in different forest 
sites using a Li-Cor 6200 soil respiration chamber (model 6299).  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 TE-05 Soil Respiration Data

1.2 Data Set Introduction

Soil respiration data were collected in the field using a Li-Cor 6200 portable 
photosynthesis system and a Li-Cor soil respiration chamber (model 6299).

1.3 Objective/Purpose

The data were collected to compare the soil respiration rates in different 
forest sites in both the BOReal Ecosystem-Atmosphere Study (BOREAS) Northern 
Study (NSA) and Southern Study Area (SSA).

1.4 Summary of Parameters

CO2 flux (positive respiration)
soil temperature
chamber CO2 concentration
chamber air temperature
chamber vapor pressure

1.5 Discussion

These measurements were collected in the SSA at Old Jack Pine (OJP), Old Black 
Spruce (OBS), and Old Aspen (OA) site.

Measurements were collected in the NSA at the OJP, T6R5S TE Upland Black Spruce 
(UBS), and OA sites.

1.6 Related Data Sets

BOREAS TE-05 Leaf Gas Exchange Data
BOREAS TE-05 Leaf Carbon Isotope Data
BOREAS TE-05 Surface Meteorological and Radiation Data

2. Investigator(s)

2.1 Investigator(s) Name and Title

J.R. Ehleringer, University of Utah, TE-05
Department of Biology

L.B. Flanagan, Carleton University, TE-05
Department of Biology

2.2 Title of Investigation

Vegetation-Atmosphere CO2 and H2O Exchange Processes: Stable Isotope Analyses

2.3 Contact Information

Contact 1
------------
J. Renee Brooks
Department of Biology
University of South Florida
Tampa, Florida
(813) 974-7352
(813) 974-3263 (fax)
jrbrooks@chuma.cas.usf.edu


Contact 2
------------
Dr. Larry Flanagan
Department of Biological Sciences
University of Lethbridge
Lethbridge, Alberta
CANADA
(403) 380-1858
(403) 329-2082 (fax)
larry.flanagan@uleth.ca

Contact 3
------------
Shelaine Curd
Raytheon STX Corporation
NASA/GSFC
Greenbelt, MD 
(301) 286-2447
(301) 286-2039 (fax)
Shelaine.Curd@gsfc.nasa.gov

3. Theory of Measurements

Measurements were made using a Li-Cor soil respiration chamber (model 6299) 
attached to a Li-Cor 6200 portable photosynthesis system, an instrument that 
uses a dynamic, closed chamber technique. Theoretical details of the 
measurements and instruments can be obtained from the manufacturer: Li-Cor Inc. 
P.O. Box 4425 Superior Street, Lincoln, Nebraska, 68504, USA. Toll-free 
telephone 1-800-447-3576 (US & Canada), telephone (402) 467-2819.

4. Equipment

4.1 Sensor/Instrument Description

4.1.1 Collection Environment

The equipment operated under ambient environmental conditions during the 
measurement periods.  Please see TE-05 Surface Meteorological and Radiation Data 
for specifics.

4.1.2 Source/Platform

None given.

4.1.3 Source/Platform Mission Objectives

The data were collected to compare the soil respiration rates in different 
forest sites.

4.1.4 Key Variables

CO2 Flux
Vapor Pressure
Soil Temperature
Air Temperature

4.1.5 Principles of Operation

Measurements were made using a Li-Cor soil respiration chamber (model 6299) 
attached to a Li-Cor 6200 portable photosynthesis system, an instrument that 
uses a dynamic, closed chamber technique. 

4.1.6 Sensor/Instrument Measurement Geometry
 
None given.

4.1.7 Manufacturer of Sensor/Instrument

Li-Cor Inc. P.O. Box 4425 Superior Street, Lincoln, Nebraska, 68504, USA. Toll-
free telephone 1-800-447-3576 (US & Canada), telephone (402) 467-2819.

4.2 Calibration

4.2.1 Specifications

None given.

4.2.1.1 Tolerance

None given.

4.2.2 Frequency of Calibration

None given.

4.2.3 Other Calibration Information

The infrared gas analyzer of the Li-Cor 6200 portable photosynthesis system was 
calibrated using primary standard gas mixtures from Matheson Gas. These gas 
mixtures were compared to BOREAS project calibration standards. 

5. Data Acquisition Methods

None given.

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

Samples were collected at NSA OJP, SSA OJP, SSA OBS, and NSA UBS in 1993 and all 
the sites listed below in 1994:

NSA OJP flux tower site: Lat/Long=55.927 N, 98.62 W, Universal Transverse 
Mercator (UTM) Zone 14, N:6,197,997 E:523,501.

SSA OJP flux tower site: Lat/Long=53.916 N, 104.69 W, UTM Zone 13, N:5,951,000 
E:479,400.

NSA OA canopy access tower site (auxiliary site number T2Q6A, BOREAS Experiment 
Plan, Version 3). Lat/Long = 55.88N, 98.67 W

SSA OA flux tower site: Lat/Long=53.629 N, 106.197 W, UTM Zone 13, N:5,942,688 
E:420,874.

NSA UBS canopy access tower site (auxiliary site number T6R5S, BOREAS Experiment 
Plan, Version 3). Lat/Long = 55.70N, 98.51W

SSA OBS flux tower site: Lat/Long = 53.985 N, 105.122 W, UTM Zone 13, 
N:5,981,904  E:492,000.

7.1.2 Spatial Coverage Map

Not available.

7.1.3 Spatial Resolution

These data are point source measurements at the locations given.

7.1.4 Projection

Not applicable.

7.1.5 Grid Description

Not applicable.

7.2 Temporal Characteristics

7.2.1 Temporal Coverage

These data were collected over the period of 26-MAY-94 to 07-SEP-94.

7.2.2 Temporal Coverage Map

Not available

7.2.3 Temporal Resolution

Each site was visited multiple times during the 1994 growing season.

7.3 Data Characteristics

Data characteristics are defined in the companion data definition file 
(te5soilr.def).

7.4 Sample Data Record

Sample data format shown in the companion data definition file (te5soilr.def).

8. Data Organization

8.1 Data Granularity

All of the Soil Respiration Data 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 files (te5soilr.def).

9. Data Manipulations

9.1 Formulae

None given.

9.1.1 Derivation Techniques and Algorithms

None given.

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.

9.3.2 Calculated Variables

None.

9.4 Graphs and Plots

None.

10. Errors

10.1 Sources of error

All known errors have been removed from the data.

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 Assessments

None given.

10.2.5 Data Verification by Data Center

Data was 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

None given.

11.4 Other Relevant Information

None given.

12. Application of the Data Set

Comparison of soil respiration rates in different forest sites in NSA and SSA.

13. Future Modifications and Plans

None given.

14. Software

14.1 Software Description

None given.

14.2 Software Access

None given.

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 TE-05 soil respiration 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

16.1 Tape Products

None.

16.2 Film Products

None.

16.3 Other Products

The data are available in tabular ASCII files.

17. References

17.1 Platform/Sensor/Instrument/Data Processing Documentation

None.

17.2 Journal Articles

Brooks, J.R., L.B. Flanagan, G.T. Varney, J.R. Ehleringer. 1997. Vertical
gradients in photosynthetic gas exchange characteristics and refixation of
respired CO2 within boreal forest canopies. Tree Physiology 17: 1-12.

Sellers, P., F. Hall. 1994. Boreal Ecosystem-Atmosphere Study: Experiment Plan. 
Version 1994-3.0, NASA BOREAS Report (EXPLAN 94). 

Sellers, P., F. Hall. 1996. Boreal Ecosystem-Atmosphere Study: Experiment Plan. 
Version 1996-2.0, NASA BOREAS Report (EXPLAN 96). 

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

Sellers, P., F. Hall, 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., F. Hall. 1997. BOREAS Overview Paper. JGR Special Issue.

17.3 Archive/DBMS Usage Documentation

None.

18. Glossary of Terms

None.

19. List of Acronyms

    ASCII   - American Standard Code for Information Interchange
    BOREAS  - BOReal Ecosystem-Atmosphere Study
    BORIS   - BOREAS Information System
    DAAC    - Distributed Active Archive Center
    EOS     - Earth Observing System
    EOSDIS  - EOS Data and Information System
    GSFC    - Goddard Space Flight Center
    HSA     - Hemi-surface area
    NASA    - National Aeronautics and Space Administration
    NSA     - Northern Study Area
    OA      - Old Aspen
    OBS     - Old Black Spruce
    OJP     - Old Jack Pine 
    ORNL    - Oak Ridge National Laboratory
    PANP    - Prince Albert National Park
    SSA     - Southern Study Area
    TE      - Terrestrial Ecology
    TLA     - Total Leaf Area
    UBS     - Upland Black Spruce
    URL     - Uniform Resource Locator
    UTM     - Universal Transverse Mercator

20. Document Information

20.1 Document Revision Date

    Written : 10-Jun-1997
    Last Updated: 05-Jun-1998

20.2 Document Review Date(s)

      BORIS Review: 10-Jun-1997
      Science Review:

20.3 Document

20.4 Citation

Please contact Investigators listed in Section 2.3.

20.5 Document Curator

20.6 Document URL


Keywords

Respiration
Soil
CO2 Flux
Temperature

te05_soil_res
06/11/98