摘要
利用1961-2005年青海南部牧区气象台站观测的气温、降水、积雪资料,用气候诊断方法分析了该地区积雪等气候要素的年代际演变特征以及雪灾变化的成因。结果表明:20世纪60-90年代冬季青海南部牧区中雪和大雪出现的站次以及雪灾出现的站次有逐步增多的趋势,降雪量和地表平均积雪量每10a分别增加1.253mm和8.246cm,单站积雪量在海拔4100m左右的高度上增加比较明显,其变化是由气候的年代际波动引起的。
Based on the data of air temperature, rainfall, and snow cover observed by meteorological stations in the pasturing area in the south of Qinghai Province from 1961 to 2005 and using the climate diagnosis method, the evolutional characteristics of climate elements and the cause of change of snow disasters are analyzed. The results indicate that the station-times for occurrences of moderate snow, heavy snow and snow disasters showed a gradually increasing tendency in the pasturing area in the south of Qinghai from the 1960s to 1990s, and the snowfall and mean surface snow cover climatologically increased by 1.253 mm/10a and 8.246 cm/10a, respectively. The snow cover of single-stations about 4100 m altitudes increased significantly. And such a change is closely related to the decadal oscillations of climate.
出处
《气候变化研究进展》
CSCD
2007年第1期36-40,共5页
Climate Change Research
基金
国家自然科学基金项目(40665002
40475038)
中国气象局气候变化专项(CCSF2005-2-QH22
CCSF2007-28)
关键词
积雪
雪灾
气候变化
青海南部
snow cover
snow disasters
climate change
the south of Qinghai Province
