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| Titel |
A study of the impact of synoptic weather conditions and water vapor on aerosol–cloud relationships over major urban clusters of China |
| VerfasserIn |
K. Kourtidis, S. Stathopoulos, A. K. Georgoulias, G. Alexandri, S. Rapsomanikis |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 15, no. 19 ; Nr. 15, no. 19 (2015-10-02), S.10955-10964 |
| Datensatznummer |
250120070
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| Publikation (Nr.) |
 copernicus.org/acp-15-10955-2015.pdf |
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| Zusammenfassung |
| The relationships between aerosol optical depth (AOD), cloud cover (CC), and
cloud top pressure (CTP) over three major urban clusters in China are studied
under different sea level pressure (SLP) and water vapor (WV) regimes using a
decade (2003–2013) of MODIS satellite-retrieved data. Over all urban
clusters, for all SLP regimes, CC is found to increase with AOD, thus
pointing out that the CC dependence on AOD cannot be explained by synoptic
covariation, as approximated by SLP, alone. WV is found to have a stronger
impact on CC than AOD. This impact is more pronounced at high aerosol load
than at low aerosol load. Hence, studies of AOD–CC relationships, based on
satellite data, will greatly overestimate the AOD impact on CC in regions
where AOD and WV have similar seasonal variations, while they will probably
underestimate the AOD impact in regions where AOD and WV have opposite
seasonal variations. Further, this impact shows that the hydrological cycle
interferes with the aerosol climatic impact and we need to improve our
understanding of this interference. Our results also suggest that studies
attributing CTP long-term changes to changes in aerosol load might have a WV
bias. |
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