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| Titel |
The Indian summer monsoon rainfall: interplay of coupled dynamics, radiation and cloud microphysics |
| VerfasserIn |
P. K. Patra, S. K. Behera, J. R. Herman, S. Maksyutov, H. Akimoto, Y. Yamagata |
| 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 ; 5, no. 8 ; Nr. 5, no. 8 (2005-08-12), S.2181-2188 |
| Datensatznummer |
250003035
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| Publikation (Nr.) |
 copernicus.org/acp-5-2181-2005.pdf |
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| Zusammenfassung |
| The Indian summer monsoon rainfall (ISMR), which has a strong
connection to agricultural food production, has been less predictable by
conventional models in recent times. Two distinct years 2002 and 2003
with lower and higher July rainfall, respectively, are selected to help
understand the natural and anthropogenic influences on ISMR. We show that
heating gradients along the meridional monsoon circulation are reduced
due to aerosol radiative forcing and the Indian Ocean Dipole in 2002. An
increase in the dust and biomass-burning component of the aerosols through
the zonal monsoon circulation resulted in reduction of cloud droplet growth
in July 2002. These conditions were opposite to those in July 2003 which led
to an above average ISMR. In this study, we have utilized NCEP/NCAR
reanalyses for meteorological data (e.g. sea-surface temperature,
horizontal winds, and precipitable water), NOAA interpolated
outgoing long-wave radiation, IITM constructed all-India rainfall
amounts, aerosol parameters as observed from the TOMS
and MODIS satellites, and ATSR fire count maps. Based on this analysis, we
suggest that monsoon rainfall prediction models should include
synoptic as well as interannual variability in both atmospheric
dynamics and chemical composition. |
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