Abstract
The precipitation in Shandong in July, August as well as the whole summer (JJA) and the corresponding 500 hPa geopotential height fields are analyzed by means of the SVD (singular value decomposition) methodology. It is found that the general circulations in East Asia and the Western Pacific underwent decadal changes around 1979. The geopotential height, in particular over key areas like the South China Sea and the Philippines, increased after 1979. Corresponding to the changes in the geopotential height, the rainfall in Shandong started to decrease around 1979. The synthesized analysis shows that when the geopotential height at 500 hPa level decreases in the key areas, the Western Pacific subtropical high shifts northward and an anticyclonic anomalous cell enforces the southerly flow over Shandong-Korea-Japan, Shandong could experience a wet period. A dry period is likely to occur when the geopotential height increases in these key areas, the subtropical high moves southward or expands westward to a great distance, and a cyclonic anomalous cell controls Shandong. Respective conceptual models for the causative mechanism are obtained for the cases of July, August and the whole summer (JJA) .
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Gong, D.Y., S.W. Wang, and J.H. Zhu, 2000. Mechanism analysis of the summer rainfall along the middle to lower reaches of Changjiang River in the 1990s. Acta Geographica Sinica, 55(5): 567–575.
Gong, D.Y., and X.Z. He, 2002. Interdecadal change in Western Pacific subtropical high and climatic effects. Acta Geographica Sinica, 57(2): 185–187.
Hoskins, B.J., and D.K. Karoly, 1981. The steady linear response of a spherical atmosphere to thermal and orographic forcing. J. Atmos. Sci., 38: 1179–1196.
Huang, R.H., and W.J. Li, 1988. The influence of heat source anomalies over the tropical West Pacific in summer on the subtropical high above East Asia and the physical mechanisms. Scientia Atmospherica Sinica, (Special issue), 107–116.
Li, H.Z., P.D. Liang, and Y.L. Liang, 1977. The long range prediction of the drought and flood in the middle and lower reaches of the Yangtze in rainy season and the 500 hPa general circulation patterns as well as the variations. Scientia Atmospherica Sinica, 1: 180–187.
Li, Q. C., S. F. Zhou, and S. L. Zhang, 2003. Study on the criteria for the starting of the rainy season in Shan dong. Shandong Meteorology, 23(91): 17–19.
Li, Y. Q., and C.Y. Li, 2001. Singular value decomposition analysis of air temperature in spring in Sichuan Province and Chongqing City and 500 hPa geopotential height. Plateau Meteorology, 20(2): 165–172.
Long, F.C., Y.G. Ding, and Y. Zhou, 2003. Applicability of singular value decomposition and singular cross-spectrum to diagnose of rainfall in North China. Journal of Applied Meteorological Science, 14(2): 176–187.
Prokaska, J.A., 1976. Technique for analyzing the linear relationships between two meteorological fields. Mon. Wea. Rev., 104: 1345–1353.
Shi, N., 1995. Multivariate Analysis Methodology in Meteorological Research and Forecast. Press of Meteorology, Beijing, 344 pp.
Su, S. J., W.G. Wang, and Q. Y. Yang, 1999. Singular value decomposition analysis between the precipitation in Yunnan and SSTA. Journal of Yunnan University, 21(5): 353–356.
Sun, S.Q., and S.J. Ma, 2001. A study on relationship between the anomaly of subtropical high over the Western Pacific and the heavy flooding in Yangtze River valley in 1998. Acta Meteorologica Sinica, 59(6): 719–729.
Wang, X. C., and G. X. Wu, 1997. The analysis of relationship between the spatial modes of summer precipitation anomalies over China and the general circulation. Scientia Atmospherica Sinica, 21(2): 161–169.
Zhang, Q., and G.X. Wu, 2001. The large area flood and drought over Yangtze River valley and its relation to the South Asia high. Acta Meteorologica Sinica, 59(5): 569–577.
Zhang, S.P., Q.Y. Liu, S.J. Liu, and D.L. Gong, 2004. Influence of the convection over the South China Sea on the summer precipitation of Shandong Province. Journal of Ocean University of China, 3(1): 23–32.
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Gao, A., Zhang, S., Shen, P. et al. An analysis of the causes of decadal variations of rainfall in Shandong in summer. J Ocean Univ. China 4, 99–107 (2005). https://doi.org/10.1007/s11802-005-0002-x
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DOI: https://doi.org/10.1007/s11802-005-0002-x