Abstract
Re-analysis, using surface, upper-air, and satellite observations specially collected during the Arabian Sea Monsoon Experiment-I (ARMEX-I), has been performed with a global data assimilation system at T-80/L18 resolution. Re-analysis was performed for the entire ARMEX-I period (15th June–16th August 2002). In this paper we discuss the results based on re-analysis and subsequent forecasts for two successive intensive observation periods associated with heavy rainfall along the west coast of India during 2–12 August, 2002. Results indicate that the re-analysed fields can bring out better synoptic features, for example troughs along the west coast and mid tropospheric circulation over the Arabian Sea. Simulated rainfall distribution using re-analysis as initial condition also matches observed rainfall better than data from the initial analysis.
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Acknowledgement
The authors duly acknowledge the efforts of scientists from a variety of organizations in providing special observations taken during ARMEX period to ARMEX data centre on time. Acknowledgement is also due to the Head, NCMRWF, for providing computing facilities and other support enabling the re-analysis to be conducted. Partial financial support of this work was provided by the Department of Science and Technology, Government of India. The TRMM data used in this study for rainfall comparison were acquired using the GES-DISC Interactive Online Visualization and Analysis Infrastructure (Giovanni) as part of the NASA's Goddard Earth Sciences (GES) Data and Information Services Center (DISC).
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Das Gupta, M., Pradhan, P.K., Das, S. et al. Simulation of rain-bearing summer monsoon systems along the west coast of India by use of ARMEX re-analysis. Nat Hazards 42, 379–390 (2007). https://doi.org/10.1007/s11069-006-9083-0
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DOI: https://doi.org/10.1007/s11069-006-9083-0