Detecting the origins of moisture over southeast China: Seasonal variation and heavy rainfall
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To examine the ability of the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model to detect the origins and paths of moisture supplied to Southeast China, trajectories of air particles released over Southeast China were traced backward during 1 April 2012 to 31 March 2013 and three typical regional persistent heavy rainfall events. The HYSPLIT model provides more insightful information than water vapor flux. Analysis of the specific humidity along the trajectories revealed the origins of moisture and their contributions to the moisture supply in Southeast China. In the boreal summer half year, four key moisture transport paths from the eastern Indian Ocean, central Indian Ocean, South China Sea (SCS), and western North Pacific (WNP) contribute 10%, 20%, 31%, and 16% of the moisture to Southeast China, respectively. In the winter half year, the contributions of the paths from the WNP and North China double. Examination of heavy rainfall events showed that under tropical storm conditions, all moisture transport routines are rotated cyclonically before reaching Southeast China. The invasion of cold air can trigger heavy rainfall in both the summer and winter half years but plays different roles: it does not contribute to the moisture supply but plays a key role in converging and uplifting the moisture in the summer half year, while it supplies a great amount of moisture in the winter half year as it absorbs abundant moisture in crossing the WNP.
Key wordsmoisture origin Southeast China HYSPLIT seasonal variation heavy rainfall
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- Bao, M., 2007: The statistical analysis of the persistent heavy rain in the last 50 years over China and their backgrounds on the large scale circulation. Chinese J. Atmos. Sci., 31, 779–792. (in Chinese)Google Scholar
- Bao, M., and R. H. Huang, 2006: Characteristics of the interdecadal variations of heavy rain over China in last 40 years. Chinese J. Atmos. Sci., 30, 1057–1067. (in Chinese)Google Scholar
- Ding, Y. H., 1994: Monsoons over China. Kluwer Academic Publisher, 419 pp.Google Scholar
- Draxler, R. R., and G. D. Rolph, 2003: HYSPLIT-Hybrid Single Particle Lagrangian Integrated Trajectory Model. Silver Spring [Available online at http://wwwarlnoaagov/ready/ hysplit4html.]Google Scholar
- Eagleson, P. S., 1970: Dynamic Hydrology. McGraw-Hill, Inc, 462 pp.Google Scholar
- Gaffney, S., 2004: Probabilistic curve-aligned clustering and prediction with mixture models. PhD dissertation, Department of Computer Science, University of California, Irvine, 281 pp.Google Scholar
- Gustafsson, M., D. Rayner, and D. L. Chen, 2010: Extreme rainfall events in southern Sweden: Where does the moisture come from? Tellus A, 62, 605–616.Google Scholar
- Jiang, Z. H., Z. R. Liang, Z. Y. Liu, and Y. L. Zhu, 2011: A diagnostic study of water vapor transport and budget during heavy precipitation over the Huaihe River basin in 2007. Chinese J. Atmos. Sci., 35, 361–372. (in Chinese)Google Scholar
- Li, X. Z., W. Liang, and Z. P. Wen, 2010: Characteristics of the atmospheric water vapor and its relationship with rainfall in south China in northern autumn, winter and spring. Journal of Tropical Meteorology, 26, 626–632. (in Chinese)Google Scholar
- Qin, J., L. N. Pan, and L. Shi, 1991: Influences of the southern trough and strong cold air on the winter weather over Yunnan province. Meteorological Monthly, 17, 39–43. (in Chinese)Google Scholar
- Stohl, A., and Coauthors, 2003: A backward modeling study of intercontinental pollution transport using aircraft measurements. J. Geophys. Res., 108(D12), ACH 8-1–18.Google Scholar
- Tao, S. Y., and Coauthors, 1980: The Torrential Rain in China. Science Press, Beijing, 225 pp. (in Chinese)Google Scholar
- Xia, R. D., and S. X. Zhao, 2009: Diagnosis and modeling of meso-ß -scale systems of heavy rainfall in warm sector ahead of front in South China (middle part of Guangdong province) in June 2005. Chinese J. Atmos. Sci., 33, 468–488. (in Chinese)Google Scholar
- Ye, C. Z., and J. Y. Li, 2011: A numerical study of the characteristics of strong moisture transport as a result of the interaction of tropical storm Bilis with the South China Sea monsoon. Acta Meteorologica Sinica, 69(3), 496–507. (in Chinese)Google Scholar
- Zhang, H. D., and Q. Kong, 2007: Diagnostic analysis of severe tropical storm Bilis heavy rain event. Meteorological Monthly, 33(5), 42–48. (in Chinese)Google Scholar
- Zhou, H. G., 2008: 3D structure of the heavy rainfall caused by Bilis (0604) with Doppler radar data. Chinese J. Atmos. Sci., 32(6), 1289–1308. (in Chinese)Google Scholar
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