Possible relation between land surface feedback and the post‐landfall structure of monsoon depressions
Year: 2009
Type: article
Abstract: 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.
Source: Geophysical Research Letters
DOI: 10.1029/2009gl037781
Institutions: Purdue University West Lafayette, NSF National Center for Atmospheric Research, Goddard Space Flight Center, National Aeronautics and Space Administration, Earth System Science Interdisciplinary Center, University of Maryland, College Park, Indian Space Research Organisation, Indian Institute of Technology Delhi, University of Georgia
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
SDG: Climate action
Open Access status: bronze
OpenAlex ID: W1830177902