Extended Abstract

The Indian summer monsoon: precipitation - soil moisturefeedback/recyclingShakeel Asharaf¹, Andreas Dobler¹, and Bodo Ahrens¹Institute of Atmospheric and Environmental Sciences, Goethe-University Frankfurt am Main, Germany¹Asharaf@iau.uni-frankfurt.de1 IntroductionThe importance of land surface processes arises because of the large energy and water exchangebetween the continental surface and the overlying atmosphere (Zhang et al., 2004). It involves howradiation energy (short wave and long wave) arriving at the land surface is partitioned into latent andsensible heat fluxes, and how water reaching the land surface becomes soil water storage, runoff,drainage, and how much water is recycled into the atmosphere. The exchange of radiation, sensibleheat, latent heat, and momentum has direct impact on wind vector, precipitation, and surface soil(Sellers, 1991). All aforesaid components are intimately linked to each other, such that changes in onemay involve compensatory changes throughout the entire climate system. These changes may amplifythe initial disturbance (anomaly) or damp it. Disturbance amplifying interactions are termed a positivefeedback mechanism, and the ones vice-versa are called negative feedback processes.The present work focuses on the investigation of the soil moisture precipitation (S-P) feedbackand recycling process (contribution of locally evapotranspirated water to precipitation) over the Indianregion, using the state of the art model COSMOCLM. The importance of soil-moisture-climaterelationship and impacts of land-surface processes to overlying atmosphere with details are as follows.Section 2 presents the model setup, experimental design, and a description of methods and assumptionsare given in Sec. 3. The results and discussion are addressed in Sec. 4 and followed by conclusions(Sec. 5).2 Model and experimental designFigure 1: Simulation and analysis (N, W, CE, and E) domains-68-