Abstract
The excessively torrential rainfall over the Yangtze–Huaihe valley during the summer of 1991 is simulated with an updated version of the second generation NCAR regional climate model (RegCM2) as a case study to evaluate the model’s performance in reproducing the daily precipitation and the associated physical factors contributing to the generation of the anomalous rainfall. This simulation is driven by large–scale atmospheric lateral boundary conditions derived from the European Center for Medium Range Weather Forecast (ECMWF) analysis. The simulation period is May to August 1991. The model domain covers East Asia and its adjacent oceanic regions. The model resolution is 60 km × 60 km in the horizontal and 23 layers in the vertical.
The model can reasonably reproduce the daily precipitation events over East Asia for the summer of 1991, especially in the Yangtze–Huaihe valley where the anomalous rainfall occurred. The spatial and temporal structure of some important physical variables and processes related to the generation of the anomalous rainfall are analyzed. The time evolution of simulated upward vertical motion and horizontal convergence agrees with the five rainfall episodes over this subregion. The water vapor feeding the rainfall is mostly transported by the horizontal atmospheric motions from outside of the region rather than from local sources. The subtropical high over the western Pacific Ocean controls the progress and retreat of the summer monsoon over East Asia, and the RegCM2 can simulate the northward migration and southward retreat of subtropical high over the western Pacific Ocean. Furthermore, the model can represent the daily variation of the low level jet, which is crucial in the water vapor transport to the Yangtze–Huaihe valley.
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References
Anthes, R. A., E. -Y. Hsie, and Y. -H. Kuo, 1987: Description of the Penn State/NCAR Mesoscale Model Version 4 (MM4). NCAR Tech. Note, NCAR/TN-282+STR, 66pp.
Briegleb, B. P., 1992: Delta-Eddington approximation for solar radiation in the NCAR Community Climate Model. J. Geophys. Res., 97, 7603–7612.
Dickinson, R. E., A. Henderson-Sellers, and P. J. Kennedy, 1992: Biosphere-Atmosphere Transfer Scheme (BATS) version 1E as coupled to the NCAR Community Climate Model. NCAR Tech. Note, NCAR/TN-387+STR, 72pp.
Ding Yihui, 1991: Summer monsoon rainfall in China. J. Meteor. Soc. Japan, 70(1B) (Special Edition on Asian Monsoon), 243–266.
Ding Yihui, 1993: Studies on the Excessively Storm Rainfall over the Yangtze-Huaihe Valley in 1991. China Meteorological Press, Beijing, 255pp, (in Chinese).
Fu Congbin, Wei Helin, Chen Ming, Su Bingkai, Zhao Ming, and Zheng Weizhong, 1998: Simulation of the evolution of summer monsoon rainbelts over eastern China from regional climate model. Scientia Atmospherica Sinica, 22 (4), 522–534.
Giorgi, F., 1991: Sensitivity of simulated summertime precipitation over the western United States to different physics parameterizations. Mon. Wea. Rev., 119, 2870–2888.
Giorgi, F., Y. Huang, K. Nishizawa, and C. Fu, 1999: A seasonal cycle simulation over eastern Asia and its sensitivity to radiative transfer and surface processes. J. Geophys. Res., 104, 6403–6423.
Giorgi, F., and G. T. Bates, 1989: The climatological skill of a regional model over complex terrain. Mon. Wea. Rev., 117, 2325–2347.
Giorgi, F., M. R. Marinucci, and G. T. Bates, 1993a: Development of a second generation regional climate model (RegCM2) I: Boundary layer and radiative transfer processes. Mon. Wea. Rev., 121, 2794–2813.
Giorgi, F., M. R. Marinucci, G. De Canio, and G. T. Bates, 1993b: Development of a second generation regional climate model (RegCM2) II: Convective processes and assimilation of lateral boundary conditions. Mon. Wea. Rev., 121, 2814–2832.
Gong Wei, Li Weiliang, and Zhou Xiuji, 1996: Modeling summer precipitation in China by a modified NCAR RegCM. Studies on Short-term Climate Variations and Their Formation in China, H. -X. Cao, Y. -H. Li and F. -Y. Wei, Eds., China Meteorological Press, Beijing, 110–116 (in Chinese).
Grell, G. A., 1993: Prognostic evaluation of assumptions used by cumulus parameterizations. Mon. Wea. Rev., 121, 764–787.
Holtslag, A. A. M., E. I. F. de Bruijn, and H. L. Pan, 1990: A high resolution air mass transformation model for short-range weather forecasting. Mon. Wea. Rev., 118, 1561–1575.
Hostetler, S. W., and F. Giorgi, 1992: Use of a regional atmospheric model to simulate lake-atmosphere feedbacks associated with Pleistocene Lakes Lahontan and Bonneville. Climate Dyn., 7, 39–44.
Leung, L. R., S. J. Ghan, Z. -C. Zhao, Y. Luo, W. -C. Wang, and H. -L. Wei, 1999: Intercomparison of regional climate simulations of the 1991 summer monsoon in eastern Asia. J. Geophys. Res., 104, 6425–6454.
Liu Yongqiang, R. Avissar, and F. Giorgi, 1996: A simulation with the regional climate model RegCM2 of extremely anomalous precipitation during the 1991 East-Asian flood: An evaluation study. J. Geophys. Res., 101, 26,199–26,215.
Luo Yong, and Zhao Zongci, 1997: Numerical simulation of East Asian regional climate with NCAR RegCM2. Quarterly Journal of Applied Meteorology, 8(Suppl.), 124–133 (in Chinese).
Shea, D. J., K. E. Trenberth, and R. W. Reynolds, 1992: A global monthly sea surface temperature climatology. J. Climate, 5, 987–1001.
Trenberth, K. E., and J. G. Olson, 1988: ECMWF Global Analyses 1979–1986: Circulation Statistics and Data Evaluation. NCAR Technical Note, NCAR/TN-300+STR, 94pp.
Wei Helin, Fu Congbin, and W. C. Wang, 1998: The effect of lateral boundary treatment of regional climate model on the East Asian summer monsoon rainfall simulation. Chinese Journal of Atmospheric Sciences, 22 (3), 231–243.
Wei Helin, and W. C. Wang, 1998: A regional climate model simulation of summer monsoon over East Asia: A case study of 1991 flood in Yangtze-Huaihe Valley. Advances in Atmospheric Sciences, 15 (4), 489–509.
Wu Xiaoxi, Ding Yihui, and Ma Shufen, 1996: A study of the surface fluxes and structure of mixing layer during the Meiyu heavy rainfall over the Yangtze-Huaihe valley in 1991. Studies on Meso-Scale Weather and Its Dynamics, Ding Yihui, Eds., China Meteorological Press, Beijing, 269–281 (in Chinese).
Zhang Jing, 1996: Land surface process model and its coupling with a regional climate model. Ph. D. dissertation, Peking University, 202pp (in Chinese).
Zhao Zongci, and Luo Yong, 1997: Advances in regional climate modeling since 1990. Acta Meteorologica Sinica, 11, 385–406.
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This research was jointly supported by National Key Programme for Developing Basic Sciences (G1998040900 Part 1), the USA/DOE-PRC/CMA Joint Research on Regional Climate, the National Key Project of Studies on Short-Range Climate Prediction System in China under Grant 96-908-02-04.
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Yong, L., Zongci, Z. & Yihui, D. Ability of NCAR RegCM2 in reproducing the dominant physical processes during the anomalous rainfall episodes in the summer of 1991 over the Yangtze–Huaihe valley. Adv. Atmos. Sci. 19, 236–254 (2002). https://doi.org/10.1007/s00376-002-0019-7
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DOI: https://doi.org/10.1007/s00376-002-0019-7