Propagation characters of baroclinic waves in the upper troposphere during the period of rainstorm in Yangtze and Huaihe Valley

Shilong Mei; Zhaoyong Guan; Shanshan Zhong

doi:10.1117/12.728076

9 October 2007 Propagation characters of baroclinic waves in the upper troposphere during the period of rainstorm in Yangtze and Huaihe Valley

Shilong Mei, Zhaoyong Guan, Shanshan Zhong

Author Affiliations +

Proceedings Volume 6679, Remote Sensing and Modeling of Ecosystems for Sustainability IV; 66790U (2007) https://doi.org/10.1117/12.728076
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

Based on NCEP/NCAR reanalysis daily atmosphere data along with 740 stations precipitation data in China, we have choosed two typical strong Meiyu years(1998 and 2003) and analyzed propagation characters of baroclinic waves at upper troposphere during Meiyu period of these years. The results indicate that baroclinic waves of these years have obvious downstream development effect during Meiyu period. These waves develop near entrance of westerly jet about 3 days before rainstorm happens, then propagate downstream from northwest to southeast and reach the valley at the day that rainstorm happens. Energy dispersion associated with these wave packets has significant impact on happening and development of rainstorm. Characters of baroclinic waves during non-Meiyu period are also studied, however, we fail to find distinct downstream development effect in both years.

Citation Download Citation

Shilong Mei, Zhaoyong Guan, and Shanshan Zhong "Propagation characters of baroclinic waves in the upper troposphere during the period of rainstorm in Yangtze and Huaihe Valley", Proc. SPIE 6679, Remote Sensing and Modeling of Ecosystems for Sustainability IV, 66790U (9 October 2007); https://doi.org/10.1117/12.728076

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