Vertical distribution of snow cover and its relation to temperature over the Manasi River Basin of Tianshan Mountains, Northwest China  

中国天山玛纳斯河流域积雪垂直分布及其与温度的关系（英文）

作　　者：郑文龙 都金康 周小兵 宋明明 卞国栋 谢顺平 冯学智 

机构地区：[1]Department of Geographic Information Science, Nanjing University [2]Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application [3]Department of Geophysical Engineering, Montana Tech of the University of Montana

出　　处：《Journal of Geographical Sciences》2017年第4期403-419,共17页地理学报（英文版）

基　　金：National Natural Science Foundation of China,No.41271353

摘　　要：How snow cover changes in response to climate change at different elevations within a mountainous basin is a less investigated question. In this study we focused on the vertical distribution of snow cover and its relation to elevation and temperature within different elevation zones of distinct climatology, taking the mountainous Manasi River Basin of Xinjiang, Northwest China as a case study. Data sources include MODIS 8-day snow product, MODIS land surface temperature(LST) data from 2001 to 2014, and in situ temperature data observed at three hydrological stations from 2001 to 2012. The results show that:(1) the vertical distribution of snow areal extent(SAE) is sensitive to elevation in low(<2100 m) and high altitude(>3200 m) regions and shows four different seasonal patterns, each pattern is well correspondent to the variation of temperature.(2) The correlation between vertical changes of the SAE and temperature is significant in all seasons except for winter.(3) The correlation between annual changes of the SAE and temperature decreases with increasing elevation, the negative correlation is significant in area below 4000 m.(4) The snow cover days(SCDs) and its long-term change show visible differences in different altitude range.(5) The long-term increasing trend of SCDs and decreasing trend of winter temperature have a strong vertical relation with elevation below 3600 m. The decreasing trend of SCDs is attributed to the increasing trend of summer temperature in the area above 3600 m.How snow cover changes in response to climate change at different elevations within a mountainous basin is a less investigated question. In this study we focused on the vertical distribution of snow cover and its relation to elevation and temperature within different elevation zones of distinct climatology, taking the mountainous Manasi River Basin of Xinjiang Northwest China as a case study. Data sources include MODIS 8-day snow product, MODIS land surface temperature （LST） data from 2001 to 2014, and in situ temperature data ob- served at three hydrological stations from 2001 to 2012. The results show that： （1） the vertical distribution of snow areal extent （SAE） is sensitive to elevation in low （〈2100 m） and high altitude （〉3200 m） regions and shows four different seasonal patterns, each pattern is well correspondent to the variation of temperature. （2） The correlation between vertical changes of the SAE and temperature is significant in all seasons except for winter. （3） The correlation between annual changes of the SAE and temperature decreases with increasing elevation, the negative correlation is significant in area below 4000 m. （4） The snow cover days （SCDs） and its long-term change show visible differences in different altitude range. （5） The long-term increasing trend of SCDs and decreasing trend of winter temperature have a strong vertical relation with elevation below 3600 m. The decreasing trend of SCDs is attributed to the in- creasing trend of summer temperature in the area above 3600 m.

关 键 词：snow cover vertical distribution temperature inversion Manasi River correlation analysis 

分 类 号：P426.635[天文地球—大气科学及气象学] TV211.11[水利工程—水文学及水资源]