海东地区气象资料质量控制和气候变化检测

利用Yam amoto方法对西宁和海东地区的年、季平均气温和降水资料进行突变分析,对资料进行均一化处理,进而讨论了该区的气候变化情况。结果表明：全年和春季的平均气温在1996年附近发生了增暖突变;北部地区的春季降水在20世纪80年代初发生了增多的突变;南部地区的冬季降水在20世纪70年代初发生了增多的突变;湟中、互助、大通3站的平均气温因迁址而产生了虚假突变,迁址对降水的影响不明显;在没有对比观测气差的情况下用相似法订正效果较好。西宁和海东的气温升高以冬季升温最为显著,降水各时段分布不均,总体有弱的减少趋势。

Meteorological Data Quality Control and Climatic Change in Haidong Area of Qinghai Province

The abrupt changes of mean annual and seasonal temperature,precipitation in Xi'ning and Haidong were examined by using the method of Yamamoto,meanwhile,the meteorological data were treated homogeneously,and climate change there was discussed.The results show that abrupt warming in mean annual and spring temperature occurred in 1996,and an abrupt increasing in spring precipitation took place at the beginning of the 1980s in northern area,while an abrupt increasing in winter precipitation occurred in the early 1970s in southern area.There were inveracious abrupt changes in mean temperature in Huangzhong,Huzhu and Datong because of the meteorological stations removing,but this has little impact on precipitation.The winter temperature increase was the most obvious in Xi'ning and Haidong area,and precipitation presented little decreasing trend as a whole.