摘要
利用青海高原45个气象站1961—2008年冬季(10月至翌年2月)和春季(3—5月)积雪深度资料,按照DB63雪灾标准分类的等级,并结合实际灾情研究了青海高原雪灾时空尺度、强度及发生频次等的变化。结果表明:近50年来青海高原除了特大雪灾发生频次变化趋势不明显外,其他等级的雪灾发生频次年际变化均呈现上升趋势。青海高原南部的玉树、果洛、黄南南部、海南南部及海西东部地区是雪灾发生的高频区,柴达木盆地和青海东部地区极少发生雪灾。雪灾发生频次从20世纪60年代到2008年呈现上升趋势。
Based on the snow depth data in winter and spring at 45 stations in the Qinghai Plateau from 1961 to 2008,the spatio-temporal distribution and frequencies of snow disaster in the Qinghai Plateau were analyzed according to the snow disaster standard of DB63 （i.e.,the provincial standard）. The results show that the snow disasters of all levels displayed a rising trend over the past 48 years except the exceptionally heavy snow disaster. The south of the Qinghai Plateau （including Yushu,Guoluo,southern Huangnan,southern Hainan and eastern Haixi） is the high frequency region of snow disasters but the snow disaster occurred rarely in the Qaidam Basin and eastern Qinghai. The frequency of snow disasters shows a generally rising trend since the 1960s.
出处
《气候变化研究进展》
CSCD
2010年第5期332-337,共6页
Climate Change Research
基金
国家科技支撑计划课题(2007BAC29B04)
关键词
青海高原
雪灾
时空分布
Qinghai Plateau
snow disaster
spatio-temporal distribution
