caa a22 4500 475813278 CHVBK 20180406123803.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/PL00001131 doi (NATIONALLICENCE)springer-10.1007/PL00001131 Simulation of Monsoon Disturbances in a GCM [Elektronische Daten] [K. Ashok, M. K. Soman, V. Satyan] —A large part of the rainfall over India during the summer monsoon season (June-September) is contributed by synoptic scale disturbances such as monsoon depressions. To study the evolution of such disturbances in Atmospheric General Circulation Models (AGCM), the Hadley Centre AGCM (HadAM2b) has been integrated for 15 summer monsoons (1979-1993) and the output was examined for the presence of synoptic scale disturbances such as monsoon depressions, low pressure areas, land lows and land depressions over the Indian summer monsoon region. The atmospheric initial condition for each of these integrations was of 23rd May and observed Sea Surface Temperatures (SST) were described as a boundary condition.¶Although the horizontal resolution of the AGCM used in this study is only 2.5°× 3.75° lat. long., the model is able to simulate a few monsoon disturbances. The important features of these simulated disturbances are presented. The features of the simulated disturbances are realistic. The morphologies of a well simulated monsoon depression and a simulated low pressure area are presented as examples. The frequency of the simulated monsoon depressions is less than the climatological frequency of the depressions during all four monsoon months. Birkhäuser Verlag Basel,, 2000 Key Words: Indian summer monsoon, monsoon disturbances, general circulation model, Bay of Bengal nationallicence Ashok K. Climate and Global Modelling Division, Indian Institute of Tropical Meteorology, Pune-411 008, India. E-mail: ashok@tropmet.ernet.in, IN aut Soman M. K. Climate and Global Modelling Division, Indian Institute of Tropical Meteorology, Pune-411 008, India. E-mail: ashok@tropmet.ernet.in, IN aut Satyan V. Climate and Global Modelling Division, Indian Institute of Tropical Meteorology, Pune-411 008, India. E-mail: ashok@tropmet.ernet.in, IN aut https://doi.org/10.1007/PL00001131 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00001131 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ashok K. Climate and Global Modelling Division, Indian Institute of Tropical Meteorology, Pune-411 008, India. E-mail: ashok@tropmet.ernet.in, IN aut NATIONALLICENCE 700 1- Soman M. K. Climate and Global Modelling Division, Indian Institute of Tropical Meteorology, Pune-411 008, India. E-mail: ashok@tropmet.ernet.in, IN aut NATIONALLICENCE 700 1- Satyan V. Climate and Global Modelling Division, Indian Institute of Tropical Meteorology, Pune-411 008, India. E-mail: ashok@tropmet.ernet.in, IN aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer