Transcript Andrews Forest Information Management

Preliminary Meteorological
Measurement Standards
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Statement of standards before site selection (TIE
1979)
Selected sites assume obligations
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To collect data
To characterize the ecosystem
To make data available
Original Meteorological Committee
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Dr. Harvey L. Ragsdale and Dr. Lloyd W. Swift of the Coweeta
LTER site were co-chairs
Swift and Ragsdale, 1985
Original LTER Meteorological Standards
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Standards (Swift and Ragsdale 1985)
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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
Climate Committee Established 1986
Objectives
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Establish baseline meteorological measurements
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Document both cyclic and long-term changes
Provide a detailed climatic history
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Characterize each LTER site
Enable intersite comparisons
Correlate with bioecological phenomena
Provide data for modeling
provide a basis for coordinating specialized or
short term meteorological measurements
Standards Document 1986
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Standardized measurements (4 levels)
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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
Standardized Measurements (4 Levels)
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Level 0: entry level only (1 year)
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Level 1: basic climatic station
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Continuous temperature, precipitation, humidity, wind
(all LTER sites will achieve)
Level 2: research meteorological station
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Daily temp and precipitation (all LTER sites)
More intensive, more parameters, continuous (most LTER sites)
Level 3: specialized measurements
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Coordinate plans to develop standardized techniques
Facilitate potential intersite comparisons
Intersite Exchange of Data (1986)
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Each site must make one station’s data available
Specific single site study data may be proprietary
Sharing of data will not be automatic
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Individual requests will be necessary
If future intersite study is anticipated
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Plan for identical instrumentation and methods
Pay special attention to reporting accuracy and precision
Seek advice from climate committee
http://sql.lternet.edu/climdb/climdb.html
LTER Information Manager Activities
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Network Information System (NIS)
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All-site bibliography
All-site personnel directory
Distributed Table of Contents (DTOC)
Site Description Database (SiteDB)
Climate Database Project (ClimDB)
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
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ClimDB “Centributed” Mechanics (Baker et al. 2000)
Central Site
Monthly Data
(V-One,V-Many)
Dynamic
URL
Relational
Database
Site Database
Static
URL
Public User
CGI Script
CGI Script
Individual Site
Daily Data
Graphics
Exchange
filters
Exchange
format
Distribution
filters
Report
formats
ClimDB Project Objectives
For all LTER sites:
Provide current climatic data summaries
 Provide comparable climatic data summaries
 Fulfill the needs of LTER intersite and synthesis
efforts
 Demonstrate “centributed” database approach
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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
Communication of the Research Scientist
with the Information Manager is important!
I can’t wait
to give you
my metadata
“This is
too good
to be
true”
Please fill
out the web
form
Identifying End-User Needs
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XROOTS Climate Workshop
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Identification of distribution report formats
Separation of internal data management storage structures
from exchange and report formats
CLIMSTAN Workshop:
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Blend of Science and Information Management
Participants included Climatologists, Information Managers,
Data Users/Modelers, and a Field Technician
CLIMSTAN Workshop Accomplishments
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New LTER standard climate methods documentation
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Database guidelines documentation
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Defines levels of site participation (0-4)
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
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Report format refinement
Graphical format refinement
Metadata Serves Important Roles
“I
Data
Interpretation
never
metadata
I didn’t like”
Data
Discover
y
Data
Integration
Metadata “R” Us
LTER NETWORK
METEOROLOGICAL METADATA SCHEMA
LTER_SITE_LEVEL
STATION_LEVEL
LTER_CODE
LTER_CODE
STATION_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
LATITUDE
LONGITUDE
STATION_DESCRIPTION
TOPOGRAPHY
ELEVATION
SURFACE_TYPE
EXPOSURE
WIND_EXPOSURE
STATION_START
STATION_HISTORY
STATION_PHOTO
MEASUREMENT_LEVEL
LTER_CODE
STATION_CODE
WHAT_MEASURED
BEGIN_DATE
LOG_INTERVAL
SUMMARY_INTERVAL
INSTRUMENT_HEIGHT
MEASUREMENT_HISTORY
OBSERVATION_METHOD
INSTRUMENT_TYPE
ACCURACY
CALIBRATION_HISTORY
NIS Research Module
Issues / Lessons Learned
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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
Data Use Agreement
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Assures data provider of ethical use of data
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Provides citation for data source
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Gives protection through disclaimer
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Requires notification of data usage
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Requests copies of derivative publications
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Encourages good scientific citizenship
Successful Intersite Collaboration
(Webster 2000)
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Collegiality, trust, respect
Site visits: method, procedure coordination
Incentives for participation
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Publications
Monetary support
Baseline of data and prior research
Time and patience
Effective Leadership
Typical Intersite Study:
Information Management
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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
ClimDB Variable Names
LTER_Site
The three-letter LTER site code
Station
Local site name for the weather station (10
character max)
An 8 character field, yyyymmdd
Date
Daily_AirTemp_Mean_C
Flag_Daily_AirTemp_Mean_C
Daily_AirTemp_AbsMax_C
Flag_Daily_AirTemp_AbsMax_C
Daily_AirTemp_AbsMin_C
Flag_Daily_AirTemp_AbsMin_C
Daily_Precip_Total_mm
Flag_Daily_Precip_Total_mm
Daily mean air temperature
Data quality flag for daily mean air
temperature.
Absolute maximum air temperature.
Data quality flag for absolute maximum air
temperature
Absolute minimum air temperature.
Data quality flag for absolute minimum air
temperature
Daily total precipitation
Data quality flag for daily total
precipitation
Extension of ClimDB to Level 2 & 3
Measurement
Air Temperature
Precipitation
Relative Humidity
Wind Speed
Wind Direction
Resultant Wind Speed
Resultant Wind Direction
Standard Deviation of Wind
Direction
Global Radiation
Vapor Pressure
Atmospheric Pressure
Dewpoint Temperature
Snow Depth
Pan Evaporation
Soil Temperature at xx cm
(e.g., 5 cm)
Soil Moisture at xx cm (e.g.,
5 cm)
Parameter Name
Airtemp
Precip
Rh
Windsp
Winddir
Reswindsp
Reswinddir
Stdevwinddir
Units
C
Mm
Pct
Msec
Deg
Msec
Deg
Deg
Globalrad
Vaporpressure
Atmpressure
Dewpointtemp
Snowdepth
Panevap
Soiltempxx (e.g.,
soiltemp05)
Soilmoisturexx
(e.g., soilmoisture05)
Jcm2
Kpascal
Kpascal
C
Mm
Mmday
C
Units unresolved :
two possible units
Monthly Distribution Formats
V-One
DVS 003 MATMPM
Year Jan Feb Mar Apr May
1990 45.0 50.0 53.0 58.0 64.4
1991 44.1 50.5 52.2 59.3 65.0
1992 46.8 49.0 51.6 55.4 63.4
Jun Jul
Aug Sep
70.9 74.5 73.4 70.6
70.2 73.4 72.4 71.3
72.3 76.7 75.4 69.6
Oct Nov
63.2 53.0
64.1 53.8
62.3 52.2
Dec
45.7
46.6
44.8
DVS 003 MPRECIP
Year Jan Feb Mar Apr May
1990 4.20 2.58 1.80 1.30 0.37
Jun Jul
Aug Sep
0.15 0.03 0.04 0.22
Oct Nov
0.99 2.36
Dec
3.28
V-Many
DVS 003
Year Month MATMPM
1990 Jan
45.0
1990 Feb
50.0
1990 Mar
53.0
1990 Apr
58.0
MATMPI
37.2
40.3
41.3
44.4
MATMPX
52.7
59.6
64.7
71.5
MPRECIP
4.20
2.58
1.80
1.30