| 基于RS的昆仑山区夏季雪线高程变化及其影响因素分析 |
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| 引用本文： | 张连成,胡列群,李帅,侯小刚,郑照军. 基于RS的昆仑山区夏季雪线高程变化及其影响因素分析[J]. 冰川冻土, 2019, 41(3): 546-553. DOI: 10.7522/j.issn.1000-0240.2019.0024 |
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| 作者姓名： | 张连成 胡列群 李帅 侯小刚 郑照军 |
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| 作者单位： | 新疆气候中心,新疆乌鲁木齐,830002;新疆气象服务中心,新疆乌鲁木齐,830002;中国气象局乌鲁木齐沙漠研究所,新疆乌鲁木齐,830002;国家卫星气象中心,北京,100081 |
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| 基金项目： | 国家自然科学基金项目（41505077;41471358）资助 |
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| 摘 要： | In this paper, the Kunlun Mountains is taken as the research object, and MOY10A1/MOD10A1 of moderate resolution imaging spectroradiometer and temperature, precipitation and other data from 2001 to 2015 are used to obtain the research date in this area. Using the snow cover duration ratio method, the snowline elevation and linear trend in the research area in the period is extracted. The variation of snowline elevation in the research area is analyzed by the method of correlation analysis. According to the analysis, the research date was determined as July 22 ∼ august 24 (the 203th ∼236th day) of each year, a total of 34 days, and the snowline threshold extracted by the snow cover duration ratio method was 76.5%. From 2001 to 2015, the snowline elevation in the Kunlun Mountains and other regions showed a wave rising trend. The trend rate of snowline elevation changing in the eastern, meddle and western sections of the Kunlun Mountains was 80 m · (10a)-1, 131m · (10a) -1 and 155 m · (10a)-1, respectively. The eastern section was the most stable, followed by the middle section and the western section of the mountain was the most unstable. In the 15 years, the average snowline elevation in eastern, middle and western sections of the mountains was 4 990 m, 5 271 m and 4 936 m, respectively, and the minimum snowline elevation in the middle section was higher than the maximum snowline elevation in other two sections. Therefore, the distribution characteristics of snowline elevation in the mountains were as follows: middle high, both sides low. From the yearly time scale analysis, the main controlling factor of the change of snowline elevation in the Kunlun Mountains and each section was air temperature. According to the time seasonal scale analysis, the seasons with the greatest influence of temperature on snowline elevation were summer and autumn, while the seasons with the greatest influence of precipitation were summer and winter. According to the monthly time scale analysis, the summer temperature in the mountains had the largest influence on the snowline elevation, while the winter precipitation had the largest influence on the snowline elevation. © 2019 Journal of Glaciology and Geocryology. All rights reserved.
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| 关 键 词： | 昆仑山 雪线 高程变化 影响因素 |
| 收稿时间： | 2018-02-13 |
| 修稿时间： | 2018-11-16 |
Analyses of variation of summer snowline elevation and its influencing factors in the Kunlun Mountains based on RS, 2001-2015 |
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| ZHANG Liancheng,HU Liequn,LI Shuai,HOU Xiaogang,ZHENG Zhaojun. Analyses of variation of summer snowline elevation and its influencing factors in the Kunlun Mountains based on RS, 2001-2015[J]. Journal of Glaciology and Geocryology, 2019, 41(3): 546-553. DOI: 10.7522/j.issn.1000-0240.2019.0024 |
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| Authors: | ZHANG Liancheng HU Liequn LI Shuai HOU Xiaogang ZHENG Zhaojun |
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| Affiliation: | 1. Xinjiang Uygur Autonomous Region Climate Center, Urumqi 830002, China;2. Xinjiang Uygur Autonomous Region Meteorological Service Centre, Urumqi 830002, China;3. Urumqi Desert Institute of CMA, Urumqi 830002, China;4. The National Meteorological Satellite Meteorological Center, Beijing 100081, China |
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| Abstract: | In this paper, the Kunlun Mountains is taken as the research object, and MOY10A1/MOD10A1 of moderate resolution imaging spectroradiometer and temperature, precipitation and other data from 200.to 2015 are used to obtain the research date in this area. Using the snow cover duration ratio method, the snowline elevation and linear trend in the research area in the period is extracted. The variation of snowline elevation in the research area is analyzed by the method of correlation analysis. According to the analysis, the research date was determined as July 22~august 24 (the 203th~236th day) of each year, a total of 34 days, and the snowline threshold extracted by the snow cover duration ratio method was 76.5%. From 200.to 2015, the snowline elevation in the Kunlun Mountains and other regions showed a wave rising trend. The trend rate of snowline elevation changing in the eastern, meddle and western sections of the Kunlun Mountains was 80 m·(10a)-1, 131 m·(10a)-1 and 155 m·(10a)-1, respectively. The eastern section was the most stable, followed by the middle section and the western section of the mountain was the most unstable. In the 15 years, the average snowline elevation in eastern, middle and western sections of the mountains was 4 990 m, 5 271 m and 4 936 m, respectively, and the minimum snowline elevation in the middle section was higher than the maximum snowline elevation in other two sections. Therefore, the distribution characteristics of snowline elevation in the mountains were as follows:middle high, both sides low. From the yearly time scale analysis, the main controlling factor of the change of snowline elevation in the Kunlun Mountains and each section was air temperature. According to the time seasonal scale analysis, the seasons with the greatest influence of temperature on snowline elevation were summer and autumn, while the seasons with the greatest influence of precipitation were summer and winter. According to the monthly time scale analysis, the summer temperature in the mountains had the largest influence on the snowline elevation, while the winter precipitation had the largest influence on the snowline elevation. |
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| Keywords: | Kunlun Mountains snowline elevation change influence factor |
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