EVOLUTION LAW OF DRYNESS AND WETNESS IN KUNMING IN RECENT 300 YEARS

Yan Huasheng; Xie Yingqi; Zhao Xiaoqing; Cao Jie; Zhou Chuanxi; Luo Lanxian

Abstract:

Using indexes of dryness and wetness in historical record over the recent recent years and rainfall data over the tatest century, the work involves itself with the study of climatological evolution of dryness and wetness. periodic variations of climate and interannual laws of variation. The discussion also covers the subjects of effects of El Nino. sunspot, predictors of general circulation on climatic variation of dryness and wetness. There arc main conclusions as follows: (1) The main cyclic variations of climate are 40 and 11 years in Kunming. the former being subject to that of El Nino and the latter to that of sunspots. They are two principal factors for periodic variations of dryness and wetness in Kunming. (2) A close relationship exists between interannual variations and general circulation factors for Kunming. The comprehensive influence as imposed by ENSO and allocations of W.C.E. patterns of circulation in the westerly are ma.tor weather and climate causes for the interannual variations of precipitation in Kunming.

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Yan Huasheng, Xie Yingqi, Zhao Xiaoqing, et al. EVOLUTION LAW OF DRYNESS AND WETNESS IN KUNMING IN RECENT 300 YEARS [J]. Journal of Tropical Meteorology, 1998, 4(2): 208-214.

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EVOLUTION LAW OF DRYNESS AND WETNESS IN KUNMING IN RECENT 300 YEARS

Department of Earth Science, Yunnan University, Kunming 650093

Meteorological Service of Yunnan Province, Kunming 650000

Received Date: 1997-03-10

Rev Recd Date: 1997-09-15

Abstract: Using indexes of dryness and wetness in historical record over the recent recent years and rainfall data over the tatest century, the work involves itself with the study of climatological evolution of dryness and wetness. periodic variations of climate and interannual laws of variation. The discussion also covers the subjects of effects of El Nino. sunspot, predictors of general circulation on climatic variation of dryness and wetness. There arc main conclusions as follows: (1) The main cyclic variations of climate are 40 and 11 years in Kunming. the former being subject to that of El Nino and the latter to that of sunspots. They are two principal factors for periodic variations of dryness and wetness in Kunming. (2) A close relationship exists between interannual variations and general circulation factors for Kunming. The comprehensive influence as imposed by ENSO and allocations of W.C.E. patterns of circulation in the westerly are ma.tor weather and climate causes for the interannual variations of precipitation in Kunming.

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Reference (6)

[1]	Huang Jiayou, Li fluang, 1984. Spectral analysis in meteorology (in Chinese). Beijing-China Meteorological Press, 29-32; 108-111.
[2]	Project team, 1994. Historical material of drought and floods in Kunming (in Chinese). Yunnan: Yunnan Science Press
[3]	Quinn W H et al.1987. Historical trends and statistic research of ENSO, El Nino, and drought in lndoncsia. In Collection of Translations on Long-term Weather Forecasting (in Chinese). Yunnan: Yunnan Science Press 395-401
[4]	Yan Huashcng, Lu Yabin, You Weihong, Ju .lianhua, 1995. Synoptic and climatic effects and causes of onset of rainy season in Yunnan (in Chinese). J.Appl. Meteor. 6: 124-128.
[5]	Yan Huasheng, Zhang Qing, You Weihong. 1994. Effects of changes in general circulation on rainfall in Mad over Yunnan and its forecasting (in Chinese). Plateotan Meteor. 15:211-225.
[6]	Zhau Xiauqing. Yan Huasheng, 1996. Research on restoration of historical record of dry and wet spells over 300 years (in Chinese). 395-401.

[1]	Huang Jiayou, Li fluang, 1984. Spectral analysis in meteorology (in Chinese). Beijing-China Meteorological Press, 29-32; 108-111.
[2]	Project team, 1994. Historical material of drought and floods in Kunming (in Chinese). Yunnan: Yunnan Science Press
[3]	Quinn W H et al.1987. Historical trends and statistic research of ENSO, El Nino, and drought in lndoncsia. In Collection of Translations on Long-term Weather Forecasting (in Chinese). Yunnan: Yunnan Science Press 395-401
[4]	Yan Huashcng, Lu Yabin, You Weihong, Ju .lianhua, 1995. Synoptic and climatic effects and causes of onset of rainy season in Yunnan (in Chinese). J.Appl. Meteor. 6: 124-128.
[5]	Yan Huasheng, Zhang Qing, You Weihong. 1994. Effects of changes in general circulation on rainfall in Mad over Yunnan and its forecasting (in Chinese). Plateotan Meteor. 15:211-225.
[6]	Zhau Xiauqing. Yan Huasheng, 1996. Research on restoration of historical record of dry and wet spells over 300 years (in Chinese). 395-401.

EVOLUTION LAW OF DRYNESS AND WETNESS IN KUNMING IN RECENT 300 YEARS

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