摘要
利用青海省50个气象台站逐日积雪深度资料、遥感监测积雪深度资料和牲畜死亡率资料,对遥感监测积雪数据进行了验证,证实遥感监测积雪数据能很好的反映青海积雪状况.利用积雪指标分析青海各地致灾强度大小.结果表明:青海三江源地区和祁连山区的部分地区致灾因子危险性最高,柴达木盆地的西部和东部农业区以及环湖的部分地区致灾因子危险性较低.通过分析积雪指标和牲畜死亡率的相关关系,确定了不同雪灾等级临界气象指标,对青海地区进行了雪灾风险区划.区划结果为:轻灾主要发生在柴达木盆地、东部农业区的大部和环湖的部分地区,这些地区发生轻灾的频率大都在50%以上;中灾和重灾在青海发生频率均不高,都在20%以下;三江源的大部尤其是囊谦、玉树和称多一带是特大雪灾的高发区,发生频率均在50%以上.
Based on daily snow depth data from fifty meteorological stations,daily data of remote sensing snow depth and of livestock mortality,daily remote sensing snow depth were verified by using the measured data.It is found that the remote sensing snow depth can represent the snow status well.The intensity of disaster was analyzed using snow index,demonstrating that the risk is high in the Three River Head Regions,partly in the Qilian Mountains,and low in the west of the Qaidam Basin,the eastern agriculture areas and partly around the Qinghai Lake.By analyzing the correlation between snow index and livestock mortality,the threshold values of meteorological index are determined under different snow disaster grades,and the snow risk division is made for the province according to the values.The division shows that： the light snow disaster is mainly in the Qaidam Basin,most parts of the eastern agriculture areas and partly around the Qinghai Lake,with the frequency of above 50% mostly;the frequencies of moderate snow disaster and serious snow disaster are low,below 20%,in the province;the extremely serious snow disaster is in most parts of the Three River Head Regions,especially in Nangqen,Yushu and Chindu,with the frequency of more than 50%.Countermeasure is put forward based on the characteristics of snow disaster.
出处
《冰川冻土》
CSCD
北大核心
2013年第3期656-661,共6页
Journal of Glaciology and Geocryology
基金
由公益性行业(气象)科研专项(GYHY200906019)"全球变化背景下中国气象灾害风险区划研究"
中国气象局气象关键技术集成与应用(重点)项目"牧区主要气象灾害风险评估与综合区划技术应用(CAMGJ2012M55)"资助
关键词
青海高原
雪灾
风险区划
对策
Qinghai Plateau
snow disaster
risk division
countermeasure
