1990-2018年干城章嘉流域冰川物质平衡序列模拟数据集  

A dataset of simulated sequences of glacier mass balance in the Kanchenjunga Basin during 1990–2018

作　　者：张法刚 魏俊锋[1] 刘时银 张勇[1] 王欣[1,3] 蒋宗立 ZHANG Fagang;WEI Junfeng;LIU Shiyin;ZHANG Yong;WANG Xin;JIANG Zongli(School of Earth Sciences and Spatial Information Engineering,Hunan University of Science and Technology,Xiangtan 411201,P.R.China;Institute of International Rivers and Eco-Security,Yunnan University,Kunming 650500,P.R.China;State Key Laboratory of Cryosphere Sciences,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,P.R.China)

机构地区：[1]湖南科技大学,地球科学与空间信息工程学院,湖南湘潭411201 [2]云南大学,国际河流与生态安全研究院,昆明650500 [3]中国科学院西北生态环境资源研究院,冰冻圈科学国家重点实验室,兰州730000

出　　处：《中国科学数据（中英文网络版）》2023年第4期340-351,共12页China Scientific Data

基　　金：湖南省教育厅科学研究项目(21C0346);国家自然科学基金(42171137)。

摘　　要：气候变化背景下全球冰川普遍退缩,不同属性冰川对气候变化的响应呈现差异特征。干城章嘉流域发育冰川呈现表碛覆盖、末端入湖等多种属性,长时间日尺度冰川物质平衡序列数据,可为不同属性冰川对气候变化的差异性响应研究提供重要的基础数据。本研究基于校正后的中国气象驱动数据集,采用冰川表面能量平衡模型,通过估算不同高程带表碛覆盖/裸冰区域的冰川物质积累和消融分量,重建了干城章嘉流域1990–2018年日尺度的冰川物质平衡序列,并利用大地测量法获取的冰川高程变化数据集对模型估算结果进行了检校,获取成果与已发表研究成果基本保持一致;同时,基于ITS_LIVE冰川表面流速数据集,提取和分析了1989–2018年冰川表面运动特征,并利用非冰川区地表运动统计特征对冰川表面流速数据成果进行了评估。本数据集可为研究冰川对气候变化的响应及其影响提供基础数据,也可为冰湖变化及其溃决风险等冰川水文效应和灾害研究提供参考。As a result of climate change,the global glacier shrinkage was observed,and glaciers of different types have experienced distinct changes in their mass budgets.Debris-covered and/or lake-terminating glaciers have been identified in the Kanchenjunga Basin,and the dataset of their mass balance on a longterm scale could provide an important basic data for studies of specific responses of glaciers of various types to climate change.Using the rectified China Meteorological Forcing Dataset,we reconstructed the daily mass balance of glaciers in the Kanchenjunga Basin from 1990 to 2018 through the application of a surface energy balance model.We used a glacier elevation change dataset obtained through geodetic methods to validate the model estimation results,and the results align closely with previously published research results on a multiyear scale.We extracted the surface velocities of glaciers from 1989 to 2018 from the ITS_LIVE dataset and assessed their precision based on the statistical characteristics of the surface movements in the glacier-free regions.This dataset is expected to provide basic data for the studies of the responses of glaciers with different types to climate change,and can also offer valuable references for the studies of glacial hydrological effects and disasters.

关 键 词：冰川物质平衡 冰川变化 冰川物质平衡模型 气候变化 

分 类 号：P343.6[天文地球—水文科学]