| 西藏年楚河流域冰川及冰川湖变化特征及其对气候变化的响应 |
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| 引用本文： | 李林,扎西央宗,卓玛,等.西藏年楚河流域冰川及冰川湖变化特征及其对气候变化的响应[J].高原山地气象研究,2018,38(2):28-34. |
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| 作者姓名： | 李林 扎西央宗 卓玛 等 |
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| 作者单位： | 1. 西藏高原大气环境与科学研究所, 拉萨 850000; |
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| 基金项目： | 西藏自治区重点科技计划项目(XZ201703-GA-01)高原遥感应用技术创新团队西藏自治区重点科技计划项目(Z2016A06G02/13)2015年西藏自治区重点科技项目"西藏主要气象灾害对农牧业的影响研究与数据库建设"国家自然科学基金项目(41465006) |
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| 摘 要： | 本文采用landsat陆地资源卫星数据和中国科学院寒区旱区环境与工程研究所冰川矢量编目数据和气象观测数据为数据源，利用GIS空间分析方法和气候统计方法，提取并分析了1987～2014年西藏年楚河流域冰川及冰川湖变化特征。结果表明:1987年年楚河流域内共有冰川82条，1987～2014年冰川总面积呈减少趋势，冰川面积减小18.386km2(8.34%)，变化率为-5.23km2/10a；1987年流域内面积大于0.2km2的冰湖共有8个，1987～2014年，冰湖总面积呈增加趋势，冰湖面积增加1.489km2(7.06%)，变化率为0.323km2/10a；年楚河流域年降水量变化不明显，年平均气温整体呈上升趋势(0.28℃/10a)。降水对冰川和冰湖变化影响较小，温度的持续升高是冰川和冰湖变化的主要因素。
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| 关 键 词： | 年楚河流域 遥感 冰川 冰川湖 |
| 收稿时间： | 2018-04-20 |
Change Characteristics of Glaciers and Glacial Lakes in the Nianchu River Basin in Tibet and Its Response to Climate Change |
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| Affiliation: | 1. Tibet Institute of Plateau Atmospheric and Environmental Science, Lhasa 850000, China;2. Institute of Plateau Meteorology, CMA (Lhasa), Lhasa 850000, China;3. The Climatic Center of Tibet, Lhasa 850000, China |
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| Abstract: | This paper uses landsat satellite data and glacier vector catalog data and meteorological observation data as data sources. Using GIS spatial analysis methods and climate statistics methods, the characteristics of glaciers and glacial lakes in the Nianchu River Basin of Tibet from 1987 to 2014 were extracted and analyzed. The results show: there were 82 glaciers in the Nianchu River Basin in 1987, The total area of glaciers showed a decreasing trend, and the area of glaciers decreased by 18.386km2 (8.34%),the rate of change was -5.23km2/10a From 1987 to 2014.There were 8 glacial lakes with an area greater than 0.2km2 In 1987. The total area of glacial lakes increased 1.468km2 (6.77%), with a rate of change of 0.323km2/10a From 1987 to 2014.The annual precipitation in the year of the Nianchu River Basin does not change significantly. The annual average temperature shows an upward trend with a rate of change of 0.28℃/10a. Precipitation has little effect on the changes in glaciers and glacial lakes, the continued increase in temperature is a major factor in the change of glaciers and glacial lakes. |
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