ENSO事件对川西高原区气候的影响  

The effect of ENSO events on climate in the western Sichuan Plateau area

作　　者：郑浩[1] 许武成[1] 孙高敏[1] 

机构地区：[1]西华师范大学国土资源学院,四川南充637009

出　　处：《气象与环境学报》2013年第1期40-46,共7页Journal of Meteorology and Environment

基　　金：四川省应用基础项目"ENSO事件与四川盆地旱涝关系及其机理研究"(2010JY0150)资助

摘　　要：根据1951—2010年川西高原区7个气象站降水资料和气温资料以及60 a间发生的厄尔尼诺(El Nino)/拉尼娜(La Nina)事件,分析降水量、气温与El Nino/La Nina事件之间的关系,研究El Nino/La Nina事件对川西高原区气候的影响。结果表明:1951年以来川西高原区年降水量变化不大,呈现微弱的增加趋势,El Nino/La Nina事件的发生对川西高原区年平均降水量有影响,El Nino事件影响下的年平均降水量减少,La Nina事件影响下的年平均降水量增加;El Nino年降水量低于正常年降水量39.14 mm,La Nina年降水量高于正常年降水量22.56 mm。1951年以来,川西高原区年平均气温呈微弱的波动上升趋势,川西高原区年平均气温与ENSO事件等级之间的相关性不显著。Based on the precipitation and temperature data from seven meteorological stations in the western Si- chuan Plateau area and the data of E1 Nino/La Nina events from 1951 to 2010 ,the relationship between precipitati- on, temperature and E1 Nino/La Nina events was analyzed. The effect of E1 Nino/La Nina events on the climate in the western Sichuan Plateau area was studied. The results indicate that the annual precipitation in the western Si- chuan Plateau area changes weakly since 1951, and it has a weak increasing trend. E1 Nino/La Nina events have impact on the annual average precipitation. The annual average precipitation decreases because of the impact of E1 Nino events ,while it increases because of the impact of La Nina events. The annual precipitation is 39. 14 mm less in E1 Nino years than in the normal year, while it is 22. 56 mm higher in La Nina year than in the normal year. The average of annual temperature fluctuates weakly and has an increasing trend in the western Sichuan Plateau area since 1951. The correlation between the levels of ENSO events and the average annual temperature in the western Sichuan Plateau area is not significant since 1951.

关 键 词：ENSO 降水量 温度 川西高原区 

分 类 号：P461[天文地球—大气科学及气象学]