| Weather and Climate |
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| Numerical Simulation of Rainstorm in Tianshan Mountains Area |
| ZHU Wei-jun1, LIAO Zhi-yi1, HE Qing2, MIAO Qi-long1 |
1.Ministry of Education Key Laboratory of Meteorological Disaster, Nanjing University of Information Science & Technology, Nanjing 210044, China;
2.Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China |
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Abstract Based on automatic weather station network data, sounding data and NOAA-AMSU brightness temperature data in Tianshan Mountains area, we numerically simulated a strong convective rainfall process occurred in east Tianshan Mountains area from July 16 to July 17, 2007 with the mesoscale numerical model WRF and its 3D-VAR assimilation system. A former simulation of two strong convective rainfall processes on July 18, 2004 and June 22, 2010 indicated that the scheme composition of micro-physical processes Lin scheme, Grell cumulus scheme, MYJ boundary layer parameterization scheme and coupled Noah land surface model gave more reasonable results than other combinations of physical process parameterization schemes when using WRF model in Tianshan Mountains region. Compared with results of non-assimilation test, simulation effect of location and intensity of heavy rainfall had been significantly improved by assimilation test of observation data because the initial field was closer to the actual atmospheric status. Meanwhile, forecasting accuracy of rainfall location could be improved if the horizontal resolution of the model was appropriately increased.
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Received: 21 October 2011
Published: 21 February 2012
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2012, Vol. 32 
