NWS Daily Climatology Data: 1987 (SNF): Data Set Guide Document Summary: Weather data were collected by the National Weather Service in International Falls, Minnesota. International Falls is about 80 miles from the SNF, but the weather data is representative of the area. Total solar insolation measurements were made at Fall Lake Dam in Winton, Minn. by Prof. Donald Baker of the Department of Soil Science at the University of Minnesota, St. Paul. Insolation values were measured using a Yellow Springs solar cell calibrated against an Eppley Pyranometer. Tables of Contents: 1. Data Set Overview 2. Investigator(s) 3. Theory of Measurements 4. Equipment 5. Data Acquisistion Methods 6. Observations 7. Data Description 8. Data Manipulations 9. Data Organization 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: Data Set Identification: NWS Daily Climatology Data: 1987 (SNF) Data Set Introduction: Weather data were collected by the National Weather Service in International Falls, Minnesota. International Falls is about 80 miles from the SNF, but the weather data is representative of the area. Total solar insolation measurements were made at Fall Lake Dam in Winton, Minn. by Prof. Donald Baker of the Department of Soil Science at the University of Minnesota, St. Paul. Insolation values were measured using a Yellow Springs solar cell calibrated against an Eppley Pyranometer. Objective/Purpose: Summary of Parameters: Daily temperature (minimum, maximum, average), precipitation, insolation. Discussion: Daily weather data for the years 1972 through 1990 are stored in a collection of data sets with each data set containing one year's data, plus a data set including the entire data collection. The data set names are in the form NWS Daily Climatology Data: 1972 (SNF) NWS Daily Climatology Data: 1973 (SNF) NWS Daily Climatology Data: 1974 (SNF) NWS Daily Climatology Data: 1975 (SNF) NWS Daily Climatology Data: 1976 (SNF) NWS Daily Climatology Data: 1977 (SNF) NWS Daily Climatology Data: 1978 (SNF) NWS Daily Climatology Data: 1979 (SNF) NWS Daily Climatology Data: 1980 (SNF) NWS Daily Climatology Data: 1981 (SNF) NWS Daily Climatology Data: 1982 (SNF) NWS Daily Climatology Data: 1983 (SNF) NWS Daily Climatology Data: 1984 (SNF) NWS Daily Climatology Data: 1985 (SNF) NWS Daily Climatology Data: 1986 (SNF) NWS Daily Climatology Data: 1987 (SNF) NWS Daily Climatology Data: 1988 (SNF) NWS Daily Climatology Data: 1989 (SNF) NWS Daily Climatology Data: 1990 (SNF) and NWS Daily Climatology Data: 1972-1990 (the entire data collection). Related Data Sets: 2. Investigator(s): Investigator(s) Name and Title: Dr. Forrest G. Hall NASA Goddard Space Flight Center Dr. K. Fred Huemmrich NASA Goddard Space Flight Center Dr. Donald E. Strebel Versar, Inc. Dr. Scott J. Goetz Universtity of Maryland Ms. Jamie E. Nickeson NASA Goddard Space Flight Center Ms. K.D. Woods NASA Goddard Space Flight Center Dr. Celeste Jarvis NASA Headquarters Title of Investigation: Contact Information: Dr. Forrest G. Hall NASA Goddard Space Flight Center Code 923 Greenbelt, Maryland 20771 USA Fax +1 (301) 286-0239 Telephone +1 (301) 286-2974 Email: fghall@ltpmail.gsfc.nasa.gov Requested Form of Acknowledgememt: Please cite the following NASA Technical Memorandum 104568 in any work or any publication using these data: Hall, F.G., K.F. Huemmrich, D.E. Strebel, S.J. Goetz, J.E. Nickeson, and K.D. Woods, July 1992. Biophysical, Morphological, Canopy Optical Property, and Productivity Data From the Superior National Forest. NASA Technical Memorandum 104568. National Aeronautics and Space Administration, Washington, D.C. 20546. 3. Theory of Measurements: 4. Equipment: Sensor/Instrument Description: Collection Environment: Ground-based. Source/Platform: Source/Platform Mission Objectives: Key Variables: Principles of Operation: Sensor/Instrument Measurement Geometry: Manufacturer of Sensor/Instrument: 5.2 Calibration: Calibration: Specifications: Tolerance: Frequency of Calibration: Other Calibration Information: 5. Data Acquisition Methods: 6. Observations: Data Notes: Not Available. Field Notes: 7. Data Description: Spatial Characteristics: Spatial Coverage: Spatial Coverage Map: Not Available. Spatial Resolution: Projection: Not Available. Grid Description: Not Available. Temporal Characteristics: Temporal Coverage: Temporal Coverage Map: Not Available. Temporal Resolution: Data Characteristics: ---------------------------------------------------------------------------- Variable Name/ Long Name SAS Type Generic Type Description ---------------------------------------------------------------------------- 1 location LOCATION $ 24 CHAR(20) "Location of Recording Station" ---------------------------------------------------------------------------- 2 obs_datc OBS_DATE $ 12 DATE "The date of the observations, in the format (DD-MMM-YY) (ex 01-jan-90)" ---------------------------------------------------------------------------- 3 temp_min MIN_TEMP 8 NUMBER(6,1) "Daily minimum temperature (F)" ---------------------------------------------------------------------------- 4 temp_max MAX_TEMP 8 NUMBER(6,1) "Daily maximum temperature (F)" ---------------------------------------------------------------------------- 5 temp_avg AVG_TEMP 8 NUMBER(6,1) "Daily average temperature (F)" ---------------------------------------------------------------------------- 6 precip PRECIP 8 NUMBER(7,2) "Precipitation: total daily water equivalent (inches)" ---------------------------------------------------------------------------- 7 gdd GDD 8 NUMBER(5,0) "Growing (heating) degree days accumulated for that day calculated from the sine wave method. A base value of 40 degrees (F) was used." ---------------------------------------------------------------------------- 8 t_solar TOTAL_SOLAR 8 NUMBER(5,1) "Total daily solar irradiance (Langleys) recorded by a Yellow-Springs solar cell at Winton, Minnesota" ---------------------------------------------------------------------------- 9 rel_hum REL_HUM 8 NUMBER(6,1) "Relative humidity (%) as measured daily at 1400 local time" ---------------------------------------------------------------------------- Sample Data Record: location obs_datc temp_min temp_max temp_avg precip gdd t_solar rel_hum "Fall Lake Dam, MN" "01-JAN-87" . . . . . 103.2 . "Fall Lake Dam, MN" "01-JAN-87" . . . . . 103.2 . "Fall Lake Dam, MN" "02-JAN-87" . . . . . 154.7 . "Fall Lake Dam, MN" "03-JAN-87" . . . . . 99.5 . "Fall Lake Dam, MN" "04-JAN-87" . . . . . 44.2 . "Fall Lake Dam, MN" "05-JAN-87" . . . . . 38 . "Fall Lake Dam, MN" "06-JAN-87" . . . . . 19.7 . "Fall Lake Dam, MN" "07-JAN-87" . . . . . 81.7 . "Fall Lake Dam, MN" "08-JAN-87" . . . . . 196.8 . "Fall Lake Dam, MN" "09-JAN-87" . . . . . 47.8 . "Fall Lake Dam, MN" "10-JAN-87" . . . . . 67.9 . Footnote: For presentation in this document, some padding blanks may have been eliminated between columns in the Sample Data Record. See the Data Format section for conventions used for missing data values in the data file. 8. Data Organization: Data are sorted by observation date (obs_datc) and location (location). Key fields in each record are location and obs_datc. Data Granularity: Each data set consists of a single ASCII file containing climatology data for each location for an entire year, except in the case of "NWS Daily Climatology Data: 1972-1990" which contains the climatology data for the entire period 1972-1990. Data Format: The data files associated with this data set consist of numeric and character fields of varying lengths aligned in columns. The first row of each data file contains the 8-character SAS variable name that links to the data format definition file. Character fields are enclosed in double quotes and numeric fields are listed without quotes. Missing data values can be of two varieties: * values that were identified as missing in the original data files Missing numeric values of this type are identified in these data as -999. * those holes that were created as a result of combining files that contained a slightly different variable set. Missing values of this type are identified in these data files as empty double quotes for character fields and a single period, '.' for numeric fields. 9. Data Manipulations: Formulae: Derivation Techniques and Algorithms: Data Processing Sequence: Processing Steps: Processing Changes: None. Calculations: None available at this revision. Special Corrections/Adjustments: None known at this revision. Calculated Variables: Data Processing by Data Center: The Superior National Forest data was received from the Goddard Space Flight Center in three media: * as data dumps from the original Oracle SNF database maintained by GSFC, transferred electronically from the GSFC system to the ORNL system * as ASCII files that mirrored the tables published in the Tech Memo * as hard copy (Tech Memo) Data from both electronic sources were input into SAS by ORNL DAAC data management staff and compared using computer code developed to process the SNF data. In many cases, the data values from both sources were found to be identical. In some cases, however, differences were identified and the providers of the data were consulted to resolve inconsistencies. Additionally, some variable columns were available in one source, but not the other for various reasons. For example, some calculated variables/columns were provided in the ASCII files (reflecting the Tech Memo tables) that were not stored in the Oracle database for purposes of space conservation. For similar reasons, coded values were used for many of the site and species identifier variables. A separate reference table was provided to link the coded variable with its definition, e.g., the SPECIES_REF file and the SITE_REF file. The database produced by the ORNL DAAC is a hybrid product that is a composite of data and information extracted from all three source media. In data sets where coded variables were included, the code definition variables have been added to improve usability of the data set as a stand-alone product. Therefore the ASCII files that are available through the ORNL DAAC on-line search and order systems are output from a data set that is a product of the essential core of numeric data provided by the data source (GSFC), augmented with additional descriptive information provided by GSFC and reorganized by the ORNL DAAC into a data structure consistent with other similar data sets maintained by the ORNL DAAC. Data Center Processing Steps: Graphs and Plots: None available at this revision. 10. Errors: Sources of Error: Quality Assessment: Data Validation by Source: Confidence Level/Accuracy Judgement: Measurement Error for Parameters: Additional Quality Assessments: Data Verification by Data Center: 11: Notes: Limitations of the Data: Not Available. Known Problems with the Data: None known at this revision. Usage Guidance: Any Other Relevant Information about the Study: None. 12. Application of the Data Set: 13. Future Modifications and Plans: None known at this revision. 14. Software: 15. Data Access: ORNL DAAC User Services P.O. Box 2008 Mail Stop 6407 Oak Ridge National Laboratory Oak Ridge, TN 37831-6407 USA Telephone: 423-241-3952 FAX: 423-574-4665 Email: ornldaac@ornl.gov Data Center Identification: EOSDIS Distributed Active Archive Center P.O. Box 2008 Mail Stop 6407 Oak Ridge National Laboratory Oak Ridge, TN 37831-6407 USA Telephone: 423-241-3952 FAX: 423-574-4665 Email: ornldaac@ornl.gov Procedures for Obtaining Data: Users may place requests by letter, telephone, electronic mail, FAX, or personal visit. Data is also available via the World Wide Web at http://www-eosdis.ornl.gov Data Center Status/Plans: The Superior National Forest Data is available from the ORNL DAAC. Please contact the ORNL DAAC User Services Office for the most current information about these data. 16. Output Products and Availability: 17. References: Satellite/Instrument/Data Processing Documentation: Journal Articles and Study Reports: Archive/DBMS Usage Documentation: Contact the EOS Distributed Active Archive Center (DAAC) at Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee (see the Data Center Identification Section). Documentation about using the archive and/or online access to the data is not available at this revision. 18. Glossary of Terms: A general glossary for the DAAC is located at http://www-eosdis.ornl.gov/glossary.html 19. List of Acronyms: NWS National Weather Service 20. Document Information: October 17, 1996 Document Review Date: Document ID: ORNL-SNF_MET_ALL Citation: Document Author: Merilyn J. Gentry mjg@walden.rmt.utk.edu Document URL: http://www-eosdis.ornl.gov ------------------------------------------------------------------------------ ORNL DAAC User Services Office: 423-241-3952; email ornldaac@ornl.gov Web Document Curator: Sarah Jennings, xqj@ornl.gov Document Editor: Donna Lambert Revision Date: URL: http://www-eosdis.ornl.gov