Possible relation between land surface feedback and the post-landfall structure of monsoon depressions

被引：50

作者：

Chang, Hsin-I ^{[1
,2
]}

Niyogi, Dev ^{[1
,2
]}

Kumar, Anil ^{[1
,2
,3
]}

Kishtawal, C. M. ^{[4
]}

Dudhia, Jimy ^{[3
]}

Chen, Fei ^{[3
]}

Mohanty, U. C. ^{[5
]}

Shepherd, Marshall ^{[6
]}

机构：

[1] Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA

[2] Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA

[3] Natl Ctr Atmospher Res, Boulder, CO 80307 USA

[4] Indian Space Res Org, Ahmadabad 380015, Gujarat, India

[5] Indian Inst Technol, New Delhi 110016, India

[6] Univ Georgia, Dept Geog, Athens, GA 30602 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

基金：

美国国家科学基金会;

关键词：

PRECIPITATION ANALYSIS TMPA; MODEL;

D O I：

10.1029/2009GL037781

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The effect of pre-storm land surface on the monsoon depressions (MDs) is studied. The Weather Research Forecast (WRF) model was configured with two nested domains to explore the sensitivity of MDs to antecedent soil moisture and land surface representation for selected three landfalling MDs during August 2006. Results indicate that WRF had good ability to simulate the MDs, and the post landfall model response was sensitive to antecedent soil moisture and modestly dependent on land surface representations. This was verified by reviewing the climatology of 125 MDs (1970-2003) which revealed that if the surface received heavier rainfall a week ahead of MD landfall, the inland intensity was maintained for a longer duration. The gradient in surface heat fluxes as the depression made landfall affected the evolution of the MDs over India. In particular, warmer, wetter (cooler, drier) land surface can intensify ( weaken) the landfalling MDs over the Indian monsoon region. Citation: Chang, H.-I., D. Niyogi, A. Kumar, C. M. Kishtawal, J. Dudhia, F. Chen, U. C. Mohanty, and M. Shepherd (2009), Possible relation between land surface feedback and the post-landfall structure of monsoon depressions, Geophys. Res. Lett., 36, L15826, doi: 10.1029/2009GL037781.

引用

页数：6

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