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| Titel |
A novel method to quantify the aerosol-cloud net synergy effect employing weather prediction model "errors" |
| VerfasserIn |
P. Alpert, I. Carmona |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250020598
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| Zusammenfassung |
| Aerosols have various effects on the atmosphere that are not generally incorporated in
numerical weather predictions. Most of the operational models do not take realistic aerosol
distributions into account in their radiation transfer, leading to model errors in temperature,
cloudiness, precipitation, winds and other atmospheric variables.
In this study we investigate the impact of aerosols, clouds and their interaction on the
atmosphere. Using a multi-linear regression model to separate among predictor variables, we
compare measurements of the MODIS/TERRA aerosol optical thickness (AOT) and MM5
model prediction output including errors in temperature, absolute humidity and horizontal
wind and vertical temperature gradient over Central Israel.
Based on 2001-2005 model outputs for temperature, we found that the aerosols increase
the air temperature in the low altitudes (1000-850hPa), whereas the interaction between
aerosols and clouds, or net aerosol-cloud synergy, cools the air. At 950 hPa, for instance, the
temperature increases by 1.193 |
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