ENSO现象对山西省天气气候的影响

Effect of ENSO Events on Weather and Climatic Variation in Shanxi Province

本文利用区域平均和相关方法分析了山西省沙尘日数发生频率及降水量与ENSO事件、大气-海洋环流因子SOI指数的关系.所用资料是山西18个站逐年逐月的扬沙、沙尘暴日数和降水量,资料序列长度为1961年-2003年.结果表明,山西的沙尘天气事件与SOI指数有显著的滞后两年的正响应关系,二者呈显著正相关的站点主要分布在中东部和东北部;而降水量与SOI指数有显著的滞后一年的负响应关系,二者呈显著负相关的站点主要分布在西北部和西南部.

In this paper, based on the method of regional average and correlation analysis, the relationship between days with dust storm, precipitation in Shanxi Province from 18 observation stations and atmosphere-ocean system fluctuation as indicated by SOI is analyzed from 1961 to 2003. The results show that ENSO play an important role in weather variation in Shanxi. One year lagged significant negative correlations are found between precipitation in the study region and SOl index for the period analyzed. Two year lagged positive correlation between annual days with dust storm events and SOI index are also found to be significant. Stations of significant positive correlation between dust storm and SOI are found to be located in north-eastern and mid-eastern parts, and the sites with significant negative correlation between precipitation and SOI are in the south-western and north-western parts of the study reglon.