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| Titel |
Cloud properties in the present-day tropical climate: EC-EARTH model biases |
| VerfasserIn |
C. Lacagnina, F. Selten |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250059661
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| Zusammenfassung |
| Observations are compared with the observed SST forced and coupled simulation performed
by the EC-EARTH climate model. We use different diagnostic tools to investigate model
biases in simulating marine cloud properties at different spatial and time scales in the
present-day (1985 to 2001) tropical climate. The model underestimates the thick
low-cloud amount and their contribution to the reflection of the solar radiation.
In general, most of the simulated cloud types are too bright. As a result, the net
cloud cooling effect is often overestimated, except over the subsidence cold pools.
Furthermore, our model fails to reproduce the correlations between low-cloud fraction and
mid-tropospheric pressure velocity (Ï500) and SST changes during El Niño. In
addition, some indications lead to infer EC-EARTH does not properly reproduce the
impact of the Walker circulation shifts on the CRF fluctuations in the interannual
variability. |
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