昆明近300年的旱涝变化规律

应用昆明近３００年历史旱涝指数和近百年降雨观测资料,研究了旱涝历史气候演变、气候周期变化和年际变化的规律,探讨了厄尔尼诺、太阳黑子、大气环流因子对旱涝气候变化的影响。主要结果有：（１）昆明旱涝气候变化主要存在４０年和１１年的周期,４０年变化周期受厄尔尼诺变化周期影响,１１年变化周期受太阳黑子变化周期影响,厄尔尼诺和太阳黑子的周期变化是昆明旱涝周期变化和两大影响因子。（２）昆明降雨年际变化与大气环流     

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

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.