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宁夏春季沙尘暴气候趋势及成因分析
引用本文:郑广芬,赵光平,纳丽,胡文东,孙银川,王卫东.宁夏春季沙尘暴气候趋势及成因分析[J].南京气象学院学报,2005,28(3):410-415.
作者姓名:郑广芬  赵光平  纳丽  胡文东  孙银川  王卫东
作者单位:1. 南京信息工程大学,大气科学系,江苏,南京,210044;宁夏气象防灾减灾重点实验室,宁夏,银川,750002
2. 宁夏气象防灾减灾重点实验室,宁夏,银川,750002
基金项目:国家自然科学基金资助项目(40065002),中国气象局基金资助项目“宁夏沙尘暴监测预警服务系统研究”
摘    要:对20世纪60年代以来宁夏春季沙尘暴变化趋势进行分析,结果表明:沙尘暴具有明显的年代际变化特征,80年代中期宁夏春季沙尘暴发生突变,在此之前为沙尘暴高发期,其后沙尘暴日数明显减少。为探究形成这一变化趋势原因,从形成沙尘暴的动力因子入手,对大气环流、海温、大风日数、平均气温等的长期变化趋势进行分析,发现北半球极涡强度指数、极涡面积指数、亚洲西风环流指数、Nino3区海温及宁夏春季大风日数、冬季平均气温、冬春季平均气温温差与沙尘暴存在较为一致的年代际变化特征,即决定冷空气活动频次的诸因子在80年代中期也发生了突变。由此可见,在同一生态背景下,冷空气活动次数对形成春季沙尘暴的变化趋势起着至关重要的作用。

关 键 词:春季沙尘暴  年代际变化  影响因子
文章编号:1000-2022(2005)03-0410-06

Analysis on the Trend and Reason for Spring Sandstorm in Ningxia
ZHENG Guang-fen,ZHAO Guang-ping,NA Li,HU Wen-Dong,SUN Yin-chuan,WANG Wei-dong.Analysis on the Trend and Reason for Spring Sandstorm in Ningxia[J].Journal of Nanjing Institute of Meteorology,2005,28(3):410-415.
Authors:ZHENG Guang-fen  ZHAO Guang-ping  NA Li  HU Wen-Dong  SUN Yin-chuan  WANG Wei-dong
Institution:ZHENG Guang-fen~
Abstract:Analysis on the spring sandstorm trend since 1960s in Ningxia was conducted and results show there is an obvious interdecadal change in sandstorms,an abrupt change in spring sandstorm days in Ningxia occurred in the middle 1980s,and the sandstorm days were more frequent before,and obviously less after the middle 1980s.Analyses on long-range changes of circulation,sea surface temperature,gust days,average temperature indicate that the intensity and area of Northern Hemispheric polar vortex,Asia west wind index,SST in Nino3 area and spring gust days,average winter temperature,average temperature difference of winter and spring are correlated with the features of the interdecadal change of sandstorms,i.e.there was a jump in the middle of 1980s of many factors affecting the frequency of cold air activity.The frequency of cold air activity plays a key role in the formation of the trend of spring sandstorm.
Keywords:spring sandstorm  interdecadal change  affecting factor  
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