摘要
2010～2011年冬季我国北方地区发生大面积持续干旱,部分地区干旱程度达到了特大干旱。资料显示,至今旱情仍未得到有效缓解。根据相关资料,分析了干旱发生过程中气温的异常、降水量的明显变化以及大气环流等原因。结果表明,2010～2011年我国北方大部分地区温度偏低、降水量明显减少、大气环流场异常等自然因素以及人为因素是造成干旱灾害的主要原因,并揭示了温度、降水量、大气环流等原因与"拉尼娜"现象的关系,说明"拉尼娜"现象间接地造成此次旱灾。
Widespread and sustained drought takes place in the North china in winter of 2010 -2011, the drought in some places is extremely severe. Data shows that the drought has still not been effectively relieved till now. According to relevant data, the temperature anomalies, ob- vious precipitation change and atmospheric circulation during the drought are analyzed. As indicated by the results, the drought disaster in 2010 -2011 is co-caused mainly by the human factors and the natural factors of low temperature, less precipitation and atmospheric circulation anomaly, and the relation of temperature, precipitation and atmospheric circulation with La Nina is revealed, indicating that La Nina is the di- rect cause of this drought.
出处
《安徽农业科学》
CAS
北大核心
2011年第19期11464-11466,共3页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金项目(40971021)
关键词
干旱
降水
大气环流
拉尼娜
Drough
Precipitation
Atmospheric circulation
La Nina
