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• CN 62-1072/P
• ISSN 1000-0240
• 创刊于1979年
• 主管单位：中国科学院
• 主办单位：中国科学院寒区旱区
•                  环境与工程研究所
•                  中国地理学会

• 冰冻圈与全球变化 •

### 2001-2015年天山山区积雪时空变化及其与温度和降水的关系

1. 1. 新疆大学 资源与环境科学学院 智慧城市与环境建模普通高校重点实验室/绿洲生态教育部重点实验室, 新疆 乌鲁木齐 830046;
2. 中国科学院 寒区旱区环境与工程研究所, 甘肃 兰州 730000
• 收稿日期:2017-11-13 修回日期:2018-01-02 出版日期:2018-04-25 发布日期:2018-07-02
• 通讯作者: 丁建丽,E-mail:watarid@xju.edu.cn E-mail:watarid@xju.edu.cn
• 作者简介:秦艳(1985-),女,安徽砀山人,实验师,2010年在新疆大学获硕士学位,现为新疆大学在职博士研究生,从事干旱区气候变化与水文水资源研究.E-mail:qinyan0215@163.com
• 基金资助:
国家自然科学基金项目（41771470；41730751；41771087）；新疆维吾尔自治区重点实验室专项基金项目（2016D03001）；自治区科技支疆项目（201591101）；教育部促进与美大地区科研合作与高层次人才培养项目资助

### Spatial-temporal variation of snow cover in the Tianshan Mountains from 2001 to 2015, and its relation to temperature and precipitation

QIN Yan1, DING Jianli1, ZHAO Qiudong2, LIU Yongqiang1, MA Yonggang1, Muattar Saidi1

1. 1. Xinjiang Common University Key Lab of Smart City and Environmental Simulation/Key Laboratory of Oasis Ecology under Ministry of Education, College of Resources and Environment Sciences, Xinjiang University, Vrümqi 830046, China;
2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
• Received:2017-11-13 Revised:2018-01-02 Online:2018-04-25 Published:2018-07-02

Abstract: In this study, the spatial and temporal variation of snow cover in the Tianshan Mountains and its relation to temperature and precipitation were analyzed by using linear tendency estimate and correlation analysis, based on the Moderate Resolution Imaging Spectroradiometer (MODIS) snow cover, MODIS land surface temperature data and China Meteorological Forcing Dataset during 2001-2015. The results demonstrated that:(1) There was obvious difference in monthly distribution of the snow cover percentage (SCP) for different elevation zones; the annual distribution of snow cover percentage presented a unimodal pattern below 4 000 m and over 5 000 m altitude; the maximum and minimum snow cover percentages occurred in winter and summer below 4 000 m, while the maximum and minimum values appeared in summer and winter over 5 000 m, respectively; the seasonal cycle of snow cover percentage exhibited a bimodal distribution between 4 000 m and 5 000 m altitude, with a peak in spring and autumn; during 2001-2015, there was a slight decreasing trend in annual mean snow cover percentage in Tianshan Mountains. However, there were differences in change trend of snow cover percentage in various seasons:there was a slight increasing trend in autumn, while a decreasing trend had been found in other seasons with more obvious in winter and summer. (2) The snow cover frequency (SCF) presented a spatial pattern from west high to east low and north high to south low due to water vapor sources and topography, and showed a positive correlation with elevation; the SCF had showed a decreasing trend during 2001-2015 in the Tianshan Mountains with more obvious in the altitude range between 3 600 m and 4 600 m. (3) In spring and summer, the temperature was the main cause of the change of snow cover percentage, and showed a negative correlation with snow; while in autumn and winter, precipitation was the main cause of the snow change, and had a positive correlation with snow. (4) Overall, the snow cover frequency showed a negative correlation with annual mean temperature and a positive correlation with precipitation; although there were great spatial differences in the degree of correlation and the significance level, the impact of temperature was larger than that of precipitation on SCF change.

• P468.0+25