BOREAS TGB-04 Water and Sediment Temperature data over the NSA-BP Summary The BOREAS TGB-04 team collected several data sets in support of their flux tower measurements at the NSA Beaver Pond site. This data set contains water and sediment temperature data collected from May to September 1994. 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 TGB-04 Water and Sediment Temperature data over the NSA-BP 1.2 Data Set Introduction The fluxes of heat, water and CO2 from one beaver pond were measured continuously using the energy balance Bowen ratio approach. The diffuse and bubble flux CH4 were measured several times a week using chambers. The chamber approach was used to sample CO2 and CH4 flux from 4 to 5 additional beaver ponds, once ever two weeks, and regional survey of the beaver ponds once during the IFC. The results of the work was extrapolated from the local to regional scale in collaboration with the remote-sensing project of J. Miller (York University). 1.3 Objective/Purpose The primary objective of the study was to quantify the exchange of water, and CH4 between boreal forest beaver ponds and the atmosphere for the ice free period of the BOReal Ecosystem-Atmosphere Study (BOREAS). The secondary objective of the study was to study the soil climate and soil characteristics at a forest site in conjunction with the flux studies of P. Crill (UNH). Soil moisture and temperatures were measured continuously, and soil porosity was determined. 1.4 Summary of Parameters The main parameters are daily sediment and water temperatures. 1.5 Discussion None given. 1.6 Related Data Sets BOREAS TGB01 CH4 Tower flux data over NSA BOREAS TGB-01 CO2 and CH4 Chamber Flux data over the NSA BOREAS TGB-03 NEE and air and water temperature data over the NSA Fen BOREAS TGB-03 CO2 and CH4 Chamber Flux data over the NSA BOREAS TGB-05 CO, CO2, and CH4 Chamber Flux data over the NSA 2. Investigator(s) 2.1 Investigator(s) Name and Title Dr. Nigel T. Roulet Department of Geography McGill University Montreal (514)-398-4945 (514)-398-7437 (fax) roulet@felix.geog.mcgill.ca 2.2 Title of Investigation Stores and Dynamics of Organic Matter in Boreal Ecosystems 2.3 Contact Information Contact 1 Dr. Nigel T. Roulet Department of Geography McGill University Montreal (514)-398-4945 (514)-398-7437 (fax) roulet@felix.geog.mcgill.ca Contact 2 Jeffrey A. Newcomer Raytheon STX Corporation NASA/GSFC Greenbelt, MD (301) 286-7858 Jeffrey.Newcomer@gsfc.nasa.gov 3. Theory of Measurements None given. 4. Equipment 4.1 Sensor/Instrument Description 4.1.1 Collection Environment Water and sediment temperatures were determined. 4.1.2 Source/Platform Ground. 4.1.3 Source/Platform Mission Objectives The mission objective was to determine the water and sediment temperatures over at the NSA-BP. 4.1.4 Key Variables The key variables measured were the water and sediment temperatures at specific depths. 4.1.5 Principles of Operation None given. 4.1.6 Sensor/Instrument Measurement Geometry Not applicable. 4.1.7 Manufacturer of Sensor/Instrument None given. 4.2 Calibration None given. 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 None given. 6. Observations 6.1 Data Notes BOREAS Information System (BORIS) staff compiled the information that were available to create this document. 6.2 Field Notes None given. 7. Data Description 7.1 Spatial Characteristics 7.1.1 Spatial Coverage The North American Datum of 1983 (NAD83) coordinates of the site are: NSA-9BP-FLXTR: 55.84225° N, 98.02747° W 7.1.2 Spatial Coverage Map Not available. 7.1.3 Spatial Resolution These are point source measurements. 7.1.4 Projection Not applicable. 7.1.5 Grid Description Not applicable. 7.2 Temporal Characteristics 7.2.1 Temporal Coverage The data were collected from May to September 1994. 7.2.2 Temporal Coverage Map Not applicable. 7.2.3 Temporal Resolution During optimal conditions, the temperatures were recorded hourly. 7.3 Data Characteristics Sample data format shown in the companion data definition file (tgb4wsed.def). 7.4 Sample Data Record Sample data format shown in the companion data definition file (tgb4wsed.def). 8. Data Organization 8.1 Data Granularity All of the Water and Sediment Temperature data over the NSA-BP are contained in one data set. 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 format shown in the companion data definition file (tgb4wsed.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 given. 9.3.2 Calculated Variables None given. 9.4 Graphs and Plots None. 10. Errors 10.1 Sources of Error None given. 10.2 Quality Assessment 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 were examined for general consistency and clarity and available information was compiled into this document. 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 None given. 13. Future Modifications and Plans This data set is in its final format. 14. Software 14.1 Software Description None given. 14.2 Software Access None given. 15. Data Access 15.1 Contact for Data Center/Data Access Information These BOREAS data are available from the Earth Observing System Data and Information System (EOS-DIS) 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 15.2 Procedures for Obtaining Data BOREAS data may be obtained through the ORNL DAAC World Wide Web site at http://www-eosdis.ornl.gov/ or users may place requests for data by telephone, electronic mail, or fax. 15.3 Output Products and Availability Requested data can be provided electronically on the ORNL DAAC's anonymous FTP site or on various media including, CD-ROMs, 8-MM tapes, or diskettes. The complete set of BOREAS data CD-ROMs, entitled "Collected Data of the Boreal Ecosystem-Atmosphere Study", edited by Newcomer, J., et al., NASA, 1999, are also available. 16. Output Products and Availability 16.1 Tape Products None. 16.2 Film products None. 16.3 Other Products Comma separated ASCII files. 17. References 17.1 Platform/Sensor/Instrument/Data Processing Documentation None. 17.2 Journal Articles and Study Reports 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.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):28,731-28,769. 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. 17.3 Archive/DBMS Usage Documentation None. 18. Glossary of Terms None. 19. List of Acronyms AES - Atmospheric Environment Services BOREAS - BOReal Ecosystem-Atmosphere Study BORIS - BOREAS Information System BP - Beaver Pond CMDL - Climate Monitoring and Diagnostics Laboratory DAAC - Distributed Active Archive Center ECD - Electron Capture Detector EOS - Earth Observing System EOSDIS - EOS Data and Information System FID - Flame Ionization Detector GC - Gas Chromatograph GSFC - Goddard Space Flight Center NASA - National Aeronautics and Space Administration NSA - Northern Study Area OBS - Old Black Spruce ORNL - Oak Ridge National Laboratory PANP - Prince Albert National Park SSA - Southern Study Area TE - Terrestrial Ecology TCD - Thermal Conductivity Detector TGB - Trace Gas Biogeochemistry URL - Uniform Resource Locator 20. Document Information 20.1 Document Revision Date Written: 10-Aug-1998 Last Updated: 05-May-1999 20.2 Document Review Date(s) BORIS Review: 04-May-1999 Science Review: 20.3 Document ID 20.4 Citation 20.5 Document Curator 20.6 Document URL Keywords Methane flux Carbon dioxide flux Trace Gas Water temperature Sediment temperature TGB04_Water_Sed_Temp.doc 06/09/99