摘要
物质平衡是冰川与气候相互作用的关键桥梁,对气候变化非常敏感。基于青冰滩72号冰川2008-2014年冰面花杆和雪坑的观测资料,结合Landsat系列卫星影像,利用零平衡线法对青冰滩72号冰川的物质平衡进行计算和分析。结果表明:青冰滩72号冰川2008-2014年平均物质平衡梯度为(0.86±0.19)m w. e.?(100m)-1;平衡线高度在(4 109±23)^(4 317±92)m a. s. l.之间变化,平均为(4 167.5±33.2)m a. s. l。同时,青冰滩72号冰川年净物质平衡介于-1.23m w. e.^+0.31m w. e.,年平均为-0.38m w. e.,累积物质平衡为-2.27m w. e.。此外,与位于天山地区图尤克苏冰川、乌鲁木齐河源1号冰川平衡线高度和累积物质平衡的比较发现,青冰滩72号冰川平衡线高度和物质平衡的变化与图尤克苏冰川相似,而与乌鲁木齐河源1号冰川的差异相对较大。
The glacier is sensitive to climate change,thus is widely used to understand the relationship between glacier and climate. In this paper,the mass balance of Qingbingtan Glacier No.72 was calculated based on the in situ data of stakes and pits from2008 to2014,combining with Landsat TM/ETM+/OLI images. Meanwhile,the method of Zero Equilibrium Line was used to calculate mass balance for entire glacier. The results indicated that mean gradient of mass balance with elevation was(0.86±0.19)m w. e.·(100 m)-1 during the study period. The mean equilibrium line altitude(ELA)was at(4 167.5±33.2)m a. s. l.,which ranged from(4 317±92)m a. s. l. to(4 109±23)m a. s. l. during the period of2008-2014. The mean annual mass balance was-0.38 m w. e,ranging from-1.23 m w. e. to +0.31 m w. e. During the study period,accumulative mass balance was-2.27 m w. e. from2008 to2014. In addition,based on the comparison glacier mass balances among Qingbingtan Glacier No.72,Tuyuksuyskiy Glacier and Urumqi Glacier No.1,we found that the changes in ELA and mass balance of Qingbingtan Glacier No.72 were similar to that of Tuyuksuyskiy Glacier,respectively. However,there was significant discrepancy in terms of the changes in ELA and mass balance between Qingbingtan Glacier No.72 and Urumqi Glacier No.1.
作者
车彦军
张明军
李忠勤
金爽
王文彬
王圣杰
CHE Yanjun;ZHANG Mingjun;LI Zhongqin;JINShuang;WANG Wenbin;WANG Shengjie(College of Geography and Environmental Science,Northwest Normal University',Lanzhou 730070,China;Department of Geography,Yichun University,Yichun 336000,Jiangxi,China;Tianshan Glaciological Station,State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China)
出处
《冰川冻土》
CSCD
北大核心
2020年第2期318-331,共14页
Journal of Glaciology and Geocryology
基金
国家重大科学计划研究项目(2013CBA01801)
国家自然科学基金项目(41461003,41771077)
中国清洁发展机制基金赠款项目(2014105)
宜春学院博士科研基金(113-3350100050)
科技部科技基础性工作专项(2013FY111400)资助。
