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The representation ...
The representation of tropical upper tropospheric water in EC Earth V2
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- Johnston, Marston Sheldon, 1971 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Department of Earth and Space Sciences, Chalmers University of Technology, 412 96, Göteburg, Sweden; Swedish Meteorological and Hydrological Institute (SMHI), Folkborgsvägen 1, 601 76, Norrköping, Sweden
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- Eriksson, Patrick, 1964 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Department of Earth and Space Sciences, Chalmers University of Technology, 412 96, Göteburg, Sweden
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- Eliasson, Salomon (author)
- Luleå tekniska universitet,Rymdteknik
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- Jones, C. G. (author)
- Sveriges meteorologiska och hydrologiska institut (SMHI),Swedish Meteorological and Hydrological Institute (SMHI),Swedish Meteorological and Hydrological Institute (SMHI), Folkborgsvägen 1, 601 76, Norrköping, Sweden
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- Forbes, R. M. (author)
- European Centre for Medium-Range Weather Forecasts,ECMWF, Shinfield Park, Reading, Berkshire, RG2 9AX, UK
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- Murtagh, Donal, 1959 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Department of Earth and Space Sciences, Chalmers University of Technology, 412 96, Göteburg, Sweden
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(creator_code:org_t)
- 2012-09-13
- 2012
- English.
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In: Climate Dynamics. - : Springer Science and Business Media LLC. - 0930-7575 .- 1432-0894. ; 39:11, s. 2713-2731
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Abstract
Subject headings
Close
- Tropical upper tropospheric humidity, clouds, and ice water content, as well as outgoing longwave radiation (OLR), are evaluated in the climate model EC Earth with the aid of satellite retrievals. The Atmospheric Infrared Sounder and Microwave Limb Sounder together provide good coverage of relative humidity. EC Earth's relative humidity is in fair agreement with these observations. CloudSat and CALIPSO data are combined to provide cloud fractions estimates throughout the altitude region considered (500-100 hPa). EC Earth is found to overestimate the degree of cloud cover above 200 hPa and underestimate it below. Precipitating and non-precipitating EC Earth ice definitions are combined to form a complete ice water content. EC Earth's ice water content is below the uncertainty range of CloudSat above 250 hPa, but can be twice as high as CloudSat's estimate in the melting layer. CERES data show that the model underestimates the impact of clouds on OLR, on average with about 9 W m(-2). Regionally, EC Earth's outgoing longwave radiation can be similar to 20 W m(-2) higher than the observation. A comparison to ERA-Interim provides further perspectives on the model's performance. Limitations of the satellite observations are emphasised and their uncertainties are, throughout, considered in the analysis. Evaluating multiple model variables in parallel is a more ambitious approach than is customary.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
Keyword
- cirrus
- ice
- relative-humidity
- satellite
- Satellite
- diurnal cycle
- Clouds
- clouds
- climate
- IWC
- Tropics
- Humidity
- energy system ceres
- longwave
- parameterization
- Climate
- Space Technology
Publication and Content Type
- art (subject category)
- ref (subject category)
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