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Atmospheric Conditions And

Meteorological Geographical Features(TWG – AC+MF)Spiros Ventouras (Editor)

CEDA – RAL Space - STFC

Edinbrough 29 June 2001

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TWG - AC+MFAtmospheric Conditions + Meteorological Geographical Features

Membership:Sheila Cryan - European Environmental AgencyEsa Falkenroth - Swedish Meteorological and Hydrological InstituteFrédéric Guillaud - Météo-FranceStefano Nativi - Italian National Research Council (CNR - IMAA)Erwin Petz - Zentralanstalt f. Meteorologie und Geodynamik, AustriaIlkka Rinne - Finnish Meteorological Institute (FMI)Martin SchultzRaymond Sluiter - Royal Netherlands Meteorological Institute (KNMI)Bernard Strauss (Facilitator) - Météo-FranceSpiros Ventouras (Editor) - STFC Rutherford Appleton Laboratory, UKAasmund VikBruce Wright - Met Office, UK

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TWG - AC+MF from the directive

• III-13 Atmospheric Conditions:– Physical conditions in the atmosphere. Includes spatial data based on measurements,

on models or on a combination thereof and includes measurements locations

• III-14 Meteorological Geographical Features:– Weather conditions and their measurements: precipitation, temperature,

evapotranspiration, wind speed and direction

!!! What is the difference between III-13 and III-14? Distinction is not so clear & scope potentially very large

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TWG - AC+MF approach

• Develop Use Cases and use them to focus on which data are really needed– Treat AC & MF as single theme for initial development of data specification

• Ensure coherence with other, highly significant, development work underway:– Data and services specification in OGC MetOcean Domain Working

Group– New WMO Information System

• both aiming at interoperability of meteorological information

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Finding best locations for new wind farms

Climate Impacts

Flash flood forecasting

Use of meteorology in

support of emergency

response Flood forecastingClimate assessment (with past & predicted data)

High Level

Plume prediction in support of emergency

response Short & medium range flood forecasting

Detailed

Use Cases

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The scope

• No guidance available on the range of information to be covered by AC + MF:– Inclusion of forecast data?– Precise list of parameters?– Spatial and temporal resolution?– Vertical dimension?– Etc.

• Detailed review of available documents yields no a priori reason to exclude any type of meteorological information– => critical question: feasibility and affordability.

• List of mandatory parameters for the initial implementation: basic meteorological parameters required for the reference use cases

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The model

• Four leaf packages:

AtmosphericCondition AtmosphericConditionProcess ObservableProperty CSML v3

• "Climate Science Modelling Language", a standards-based data model and GML application schema for atmospheric and oceanographic data developed at the Rutherford Appleton Laboratory (UK)

• with dependencies on packages from the INSPIRE Generic Conceptual Model and geographic information International Standards (ISO 191xx series), in particular ISO 19156.

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The modelPackage Structure & Dependencies

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The modelISO 19156 (Observations and Measurements)

• the AC-MF conceptual schema is rooted on the common base conceptual model of Observation and Measurements (O&M) defined in ISO 19156:2011 which introduces the concepts of observation and spatial sampling feature.

• Observation: is an act that results in the estimation of the value of a feature property of a feature of interest using a designated procedure.

• Spatial sampling feature: the applied sampling regime required where exhaustive observation of environmental parameters is not possible – for example, there is no observation that can provide air temperature values of the whole atmosphere above London.

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The modelISO 19156 (The concept of Observation )

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The model-ISO 19156 (Spatial Sampling Feature ) Example illustrating the of concepts: sampling coverage observation,

sampling feature and sampled feature.

temperature

SamplingCoverageObservation

observedProperty

featureOfInterest

relatedObservation

spatialSamplingFeature (Point)

sampledFeature

Chilbolton Observatory, UK

Measurements of air temperature (observed property) at a specific location (a point spatial sampling feature) of the atmosphere above Chilbolton Observatory, UK (sampled feature).

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• Central place given to “Atmospheric Condition”: aggregation of one or more instances of OM_Observation

• Examples of such aggregation:– an entire result set (all parameters, all times, all levels) of a single model run– all observations collected from a single ground observation station within one collecting

period (1 minute - 1 day)– all observations collected from all available ground observation stations within one

collecting period (last 3-6h)– all possible weather information available for a given region over a given time period– all air traffic related meteorological information considering two given airports and the

airspace between– any distinct data set containing meteorologically interesting data

The modelAc:Atmospheric Condition

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The modelAc:Atmospheric Condition

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• The list of parameters to be included in an Atmospheric Condition instance shall be extracted from the “ObservablePropertyValue” code list, depending on the need of the application for which the data is produced.

• If the codelist ObservablePropertyValue is not sufficient to describe an observedProperty, e.g. daily maximum temperature, further detail shall be provided by the attribute SimpleObservableProperty.constraint

The modelAc:ObservableProperty / Parameters

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The modelAc:ObservableProperty

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• The Directive states that atmospheric data can originate from measurements, models, or post-processed information combining measurement and model output.

• AtmosphericConditionProcess shall provide information regarding the

procedureused to generate the result for each observation member of AtmosphericCondition.

• This set of information consists of the following information pieces: identification, type and further documentation of the applied procedure; individual(s) and/or organisation(s) related to the procedure; names of parameters controlling the procedure’s output.

The modelAc:Atmospheric Condition Process

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The modelAc:Atmospheric Condition Process

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The modelCSML V3

• AC-MF model adopts the CSML observation types - specialisations of sampling coverage observation - each corresponding to a particular spatiotemporal sampling geometry and related coverage result [OGC pending document 11-021].

• CSML will be external to AC-MF model in the future versions.

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The modelCSML V3

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The modeloverview

AtmosphericConditionState of the Atmosphere over

a temporal/spatial extent

ResultIncluding estimates

ObservedPropertyOf phenomena

FeatureOfInterestOf Atmoshphere

Or a relevantSamplingFeature

e.g.Profile

AtmosphericConditionProcessObserved using a procedure

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TWG - AC+MFAtmospheric Conditions + Meteorological Geographical Features

Thank you for your attention !

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