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