| 祁连山区1997-2004年积雪面积和雪线高度变化分析 |
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| 引用本文： | 张杰,韩涛,王建.祁连山区1997-2004年积雪面积和雪线高度变化分析[J].冰川冻土,2005,27(5):649-654. |
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| 作者姓名： | 张杰 韩涛 王建 |
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| 作者单位： | [1]中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室,甘肃兰州730020 [2]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000 |
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| 基金项目： | 甘肃省人工增雨效果检验研究项目
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科技部科技攻关项目西部开发科技行动
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甘肃省气象局科研项目 |
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| 摘 要： | 利用1997-2004年5～8月的NOAA-AVHRR和EOS-MODIS卫星资料、周遍气象台站气象数据、人工增雨雪等相关资料,对河西内陆河流域上游的祁连山区积雪、冰川的光谱特征进行了判识,并分析了积雪面积和雪线高度变化.结果表明:6～8月祁连山西、中、东部的积雪面积都呈下降趋势,5月积雪面积有所升高;雪线高度处的气温在5月为降低趋势,6月和8月略有升高,7月升高最快;5～8月随时间的变化,祁连山区累计降水量都呈现出不同程度的增加;祁连山西、中部积雪面积和雪线高度随降水和气温的变化有明显的响应,并且中部较西部明显.人工增雪作业对祁连山雪消融具有缓冲作用.
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| 关 键 词： | 积雪面积 雪线高度 人工增雨雪 效果检验 祁连山 |
| 文章编号： | 1000-0240(2005)05-0649-06 |
| 修稿时间： | 2005年1月25日 |
Changes of Snow-cover Area and Snowline Altitude in the Qilian Mountains, 1997-2004 |
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| ZHANG Jie.Changes of Snow-cover Area and Snowline Altitude in the Qilian Mountains, 1997-2004[J].Journal of Glaciology and Geocryology,2005,27(5):649-654. |
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| Authors: | ZHANG Jie |
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| Abstract: | By using NOAA-AVHRR and EOS-MODIS data from May to August,1997-2004,spectrum characteristics of snow and ice are judged and analyzed,statistics of snow-cover area of three basins in the Qilian Mountains are made,and,by analyzing 8-year precipitation and altitude data,the snowline latitude-dependence is found.The result shows that the variation of snow-cover area from Jun to August was small,but it was large in May in the middle and east of the Qilian Mountains;on the contrary,temperature of snow-cover region was increasing,except for May;there was an increase in total precipitation of the Qilian Mountains from May to August.It is revealed that snow-cover area and snow line altitude change obviously with climate change of global and region,especially,in the middle section of the mountains.By analyzing artificial snowing data,it is demonstrated that artificial snowfall operation has a certain buffer function to snow ablation. |
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| Keywords: | snow-cover area snowline altitude artificial snowfall operation effect test Qilian Mountains |
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