Transcript WMO Climate-relevant operational Metadata Peer Hechler, Omar Baddour WMO; WIS DMA Metadata requirements for climate (1/5)  Principles from a climate perspective: (i) Metadata should be managed.

WMO
Climate-relevant operational
Metadata
Peer Hechler, Omar Baddour
WMO; WIS DMA
Metadata requirements for climate (1/5)
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Principles from a climate perspective: (i) Metadata should be
managed in a way that allows for reflecting and retrieving all
WMO
changes in the history of the observation/ instrument/
station/ network, such as siting, instrumentation, times of
observations etc., but also establishment of station,
commencement of observations, interruptions of operation,
closure of station including one-to-one ID attribution (no use of
same ID for different station through history); (ii) Metadata
should allow for re-calculation of processed data.
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Metadata should be accessible and exchangeable equally
conveniently as the meteorological/climatological data itself
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The below listed metadata requirements are subject to further
discussion and might be prioritised (required, optional). Wording
to be revised. List not exhaustive.
Metadata requirements for climate (2/5)
 Station identifier(s) incl. index number and name
 WMO
Contact information (name, mailing address, Email address,
phone numbers)
 Station actors (owner, manager, observers incl. their level of
experience/qualification etc.)
 Station type (fixed land, fixed sea, mobile land etc.)
 Location (exact geographical location incl. elevation)
 Roughness, topography of station and environment, land use
 Photography, site plan and skyline diagram of station and
environment
 Type(s) of soil incl. physical constants and profile of soil
 Type(s) of vegetation
 Observation programme (elements measured, reference time,
times at which observations and measurements are made and
reported, datum level to which atmospheric pressure data of the
station refer)
 Inspection reports
Metadata requirements for climate (3/5)
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Instruments (detailed instrument descriptions incl. manufacturer,
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model, serial number, date of installation )
Instrument and instrument maintenance status (active, out of
service, under repair; maint. frequency, calibration results etc.)
Siting and exposure of instrument incl. photos
Description of parameters measured by the instrument incl. unit,
range, resolution, format, frequency, accuracy, method,
algorithm, time constant, output averaging time etc.
Principle of operation, method of measurement and observation,
type of detection system, performance characteristics
Data acquisition incl. sampling interval, averaging interval
Correction procedures and calibration information
Type of AWS incl. manufacturer, model, serial number
Metadata requirements for climate (4/5)
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Measuring/observing programme of elements (times of
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observation, reporting frequency, data output
Data processing method and intervalls
Procedures, algorithms, calculation methods, constants,
reported resolution
Data handling: Quality Control procedures and algorithms incl.
corrections by the observer
Definition of QC-flags
Storage procedures
Method of transmission, data format, transmission time and
frequency
? Station network Metadata, such as mission, operator,
principles…??