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Preliminary Meteorological Measurement Standards

Preliminary Meteorological Measurement Standards. Statement of standards before site selection (TIE 1979) Selected sites assume obligations To collect data To characterize the ecosystem To make data available Original Meteorological Committee

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Preliminary Meteorological Measurement Standards

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  1. Preliminary Meteorological Measurement Standards • Statement of standards before site selection (TIE 1979) • Selected sites assume obligations • To collect data • To characterize the ecosystem • To make data available • Original Meteorological Committee • Dr. Harvey L. Ragsdale and Dr. Lloyd W. Swift of the Coweeta LTER site were co-chairs • Swift and Ragsdale, 1985

  2. Original LTER Meteorological Standards • Standards (Swift and Ragsdale 1985) • Original LTER planning document (TIE 1979) • Site-specific material (Waring et al. 1978) • National Weather Service (USDC 1970) • World Meteorological Organization documentation (WMO 1970, 1971) • LTER scientist experience

  3. Climate Committee Established 1986Objectives • Establish baseline meteorological measurements • Characterize each LTER site • Enable intersite comparisons • Document both cyclic and long-term changes • Provide a detailed climatic history • Correlate with bioecological phenomena • Provide data for modeling • provide a basis for coordinating specialized or short term meteorological measurements

  4. Standards Document 1986 • Standardized measurements (4 levels) • Not a single inclusive set • Established degrees of uniformity • Flexible for site specific requirements • Instrumentation, frequency, reporting guidelines • Site selection guidelines • Retention of original records required • Statement of accuracy and precision levels

  5. Standardized Measurements (4 Levels) • Level 0: entry level only (1 year) • Daily temp and precipitation (all LTER sites) • Level 1: basic climatic station • Continuous temperature, precipitation, humidity, wind (all LTER sites will achieve) • Level 2: research meteorological station • More intensive, more parameters, continuous (most LTER sites) • Level 3: specialized measurements • Coordinate plans to develop standardized techniques • Facilitate potential intersite comparisons

  6. Intersite Exchange of Data (1986) • Each site must make one station’s data available • Specific single site study data may be proprietary • Sharing of data will not be automatic • Individual requests will be necessary • If future intersite study is anticipated • Plan for identical instrumentation and methods • Pay special attention to reporting accuracy and precision • Seek advice from climate committee

  7. http://sql.lternet.edu/climdb/climdb.html

  8. LTER Information Manager Activities • Network Information System (NIS) • All-site bibliography • All-site personnel directory • Distributed Table of Contents (DTOC) • Site Description Database (SiteDB) • Climate Database Project (ClimDB)

  9. NIS Research Module Strategy • Enable cross-site data integration • Centralize access to cross-site data • Local site maintains control of data • Modular design • Prototype development

  10. ClimDB “Centributed” Mechanics (Baker et al. 2000) Individual Site Central Site Public User Monthly Data (V-One,V-Many) CGI Script Dynamic URL Site Database Relational Database Daily Data CGI Script Harvester Static URL Graphics Local Script Exchange filters Exchange format Report formats Distribution filters

  11. ClimDB Project Objectives For all LTER sites: • Provide currentclimatic data summaries • Provide comparable climatic data summaries • Fulfill the needs of LTER intersite and synthesis efforts • Demonstrate “centributed”database approach

  12. ClimDB Background • LTER Climate Committee (Greenland 1986) Standardized baseline meteorological measurements • CLIMDES (Greenland et al. 1996) LTER site monthly summaries (1961-1990) • XROOTS Climate Workshop (Bledsoe et al. 1996) Report formats (V-one, V-many) • LTER Information Management Committee Meeting (1996) “Centributed” database, exchange format, harvest mechanism • CLIMSTAN Workshop (Greenland et al. 1997) Exchange format refinement, Metadata standard development

  13. “This is too good to be true” I can’t wait to give you my metadata Please fill out the web form Communication of the Research Scientist with the Information Manager is important!

  14. Identifying End-User Needs • XROOTS Climate Workshop • Identification of distribution report formats • Separation of internal data management storage structures from exchange and report formats • CLIMSTAN Workshop: • Blend of Science and Information Management • Participants included Climatologists, Information Managers, Data Users/Modelers, and a Field Technician

  15. CLIMSTAN Workshop Accomplishments • New LTER standard climate methods documentation • Defines levels of site participation (0-4) • Database guidelines documentation • Exchange format • Quality assurance (local and network guidelines) • Participation instructions • Naming conventions (time resolution, parameter, aggregation, units) • Metadata requirements and schema • Data distribution through a web interface • Report format refinement • Graphical format refinement

  16. Metadata Serves Important Roles “I never metadata I didn’t like” Data Interpretation Data Discovery Data Integration Metadata “R” Us

  17. LTER_CODE STATION_CODE WHAT_MEASURED BEGIN_DATE LOG_INTERVAL SUMMARY_INTERVAL INSTRUMENT_HEIGHT MEASUREMENT_HISTORY OBSERVATION_METHOD INSTRUMENT_TYPE ACCURACY CALIBRATION_HISTORY LTER_CODE CLIMATE_CONTACT_NAME CLIMATE_CONTACT_EMAIL CLIMATE_CONTACT_PHONE DATA_CONTACT_NAME DATA_CONTACT_EMAIL DATA_CONTACT_PHONE QUALITY_ASSURANCE PRIMARY_STATION SECONDARY_STATIONS CLIMDES_URL COMMENTS LTER NETWORK METEOROLOGICAL METADATA SCHEMA LTER_SITE_LEVEL STATION_LEVEL MEASUREMENT_LEVEL LTER_CODE STATION_CODE LATITUDE LONGITUDE STATION_DESCRIPTION TOPOGRAPHY ELEVATION SURFACE_TYPE EXPOSURE WIND_EXPOSURE STATION_START STATION_HISTORY STATION_PHOTO

  18. NIS Research Module Issues / Lessons Learned • Science must drive development • Site participation necessary – provide incentives • Metadata capture and integration with data • Host site commitment of resources and time • Long-term maintenance and continual updates • Proprietary rights – provide data use agreement

  19. Data Use Agreement • Assures data provider of ethical use of data • Provides citation for data source • Gives protection through disclaimer • Requires notification of data usage • Requests copies of derivative publications • Encourages good scientific citizenship

  20. Successful Intersite Collaboration(Webster 2000) • Collegiality, trust, respect • Site visits: method, procedure coordination • Incentives for participation • Publications • Monetary support • Baseline of data and prior research • Time and patience • Effective Leadership

  21. Typical Intersite Study: Information Management • Scientist serves as data manager • Complete metadata is not assembled • Long-term accessibility to the database is not planned • Future updates to the database are not possible

  22. ClimDB Variable Names

  23. Extension of ClimDB to Level 2 & 3

  24. Monthly Distribution Formats V-One DVS 003 MATMPM Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1990 45.0 50.0 53.0 58.0 64.4 70.9 74.5 73.4 70.6 63.2 53.0 45.7 1991 44.1 50.5 52.2 59.3 65.0 70.2 73.4 72.4 71.3 64.1 53.8 46.6 1992 46.8 49.0 51.6 55.4 63.4 72.3 76.7 75.4 69.6 62.3 52.2 44.8 DVS 003 MPRECIP Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1990 4.20 2.58 1.80 1.30 0.37 0.15 0.03 0.04 0.22 0.99 2.36 3.28 V-Many DVS 003 Year Month MATMPM MATMPI MATMPX MPRECIP 1990 Jan 45.0 37.2 52.7 4.20 1990 Feb 50.0 40.3 59.6 2.58 1990 Mar 53.0 41.3 64.7 1.80 1990 Apr 58.0 44.4 71.5 1.30

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