ClimatologiesΒΆ
Climatology objects provide the value of parameters at different locations in the atmosphere. They are created using the
ISKClimatology class and are used by radiative transfer engines to calculate
atmospheric parameters such as number density, pressure and temperature. However, climatology objects
can be built that support any atmospheric parameter, as long as it is a scalar, and can be used as stand-alone objects
in other software projects.
Climatology |
Extension |
Description |
|---|---|---|
Fast climatological background atmosphere using MSIS and CIRA. |
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NO2 PRATMO climatological model. |
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The Labow O3 ozone climatology. |
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User defined height profiles |
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User defined height profile for legacy applications |
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User defined height profiles that vary along a great circle /plane. |
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User defined height profiles distributed across the surface of the Earth |
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The ECMWF atmosphere. Needs external database files. |
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A linear combination of two other climatologies |
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The OSIRIS aerosol height profile generated in Version 5.07 |
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The OSIRIS aerosol mode radius profile generated in Version 6.00 (unofficial) |
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The OSIRIS O3 height profile generated in Version 5.07. |
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The OSIRIS NO2 height profile generated in Version 5.07. |
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Climatology which is a constant value everywhere. |
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Climatology which is a fixed pressure and temperature (useful for IR cross-sections) |
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GEM-MACH regional climate model |
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GEOS-CHEM global climate model |
Climatology parameters are identified using standard climatology handles. All climatologies implement the concept of caching where values at atmospheric locations are calculated once for the cache and then subsequent requests to calculate atmospheric parameters are taken from the cache rather than the full actual climatological model. This provides a significant speed advantage for the atmospheric radiative transfer models but users must be aware of the possible subtleties.
For example, the MSIS90 is able to calculate atmospheric parameters at any location in the atmosphere but its cache is written so it only extracts a single height profile. All subsequent calls to retrieve atmospheric parameters at any location on Earth are taken from the cached vertical profile rather than executing the entire model.