Impact of satellite soundings on the simulation of heavy rainfall associated with tropical depressions
IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore
View Archive Info| Field | Value | |
| Title |
Impact of satellite soundings on the simulation of heavy
rainfall associated with tropical depressions
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| Creator |
V, Rakesh
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| Subject |
Meteorology and Climatology
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| Description |
The present study is carried out to examine the impact of temperature and humidity profiles from moderate resolution imaging spectroradiometer (MODIS) or/and atmospheric infrared sounder (AIRS) on the numerical simulation of heavy rainfall events over the India. The Pennsylvania State University–National Centre for Atmospheric
Research fifth-generation mesoscale model (MM5) and its three-dimensional variational
(3D-Var) assimilation technique is used for the numerical simulations. The heavy rainfall
events occurred during October 26–29, 2005, and October 27–30, 2006, were chosen for
the numerical simulations. The results showed that there were large differences observed in
the initial meteorological fields from control experiment (CNT; without satellite data) and
assimilation experiments (MODIS (assimilating MODIS data), AIRS; (assimilating AIRS
data); BOTH (assimilating MODIS and AIRS data together)). The assimilation of satellite
data (MODIS, AIRS, and BOTH) improved the predicted thermal and moisture structure of
the atmosphere when compared to CNT. Among the experiments, the predicted track
of tropical depressions from MODIS was closer to the observed track. Assimilation of
MODIS data also showed positive impact on the spatial distribution and intensity of
predicted rainfall associated with the depressions. The statistical skill scores obtained for
different experiments showed that assimilation of satellite data (MODIS, AIRS, and
BOTH) improved the rainfall prediction skill when compared to CNT. Root mean square
error in quantitative rainfall prediction is less in the experiment which assimilated MODIS
data when compared to other experiments.
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| Publisher |
Springer
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| Date |
2011-09
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cir.cmmacs.ernet.in/81/1/NAH_NEW.pdf
V, Rakesh (2011) Impact of satellite soundings on the simulation of heavy rainfall associated with tropical depressions. Nat Hazards, 58 (3). pp. 945-980. ISSN 0921-030X |
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| Relation |
http://www.springerlink.com
http://cir.cmmacs.ernet.in/81/ |
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