干旱区研究2025，Vol.42Issue(7)：1184-1195,12.DOI:10.13866/j.azr.2025.07.03
蒙古高原积雪消融对气温的响应
Response of snowmelt over the Mongolian Plateau to air temperature
摘要
Abstract
Using MODIS snow product data,this study investigates the spatiotemporal variation characteristics of the snowmelt period over the Mongolian Plateau during the 2003-2022 hydrological years.The movement of the snowmelt line toward higher latitudes and its response to air temperature are tracked and analyzed at 15-day inter-vals.The results show that:(1)The proportion of snow-covered area to the total area of the Mongolian Plateau during the 2003-2022 hydrological years ranged from 55.59%to 87.61%,with the smallest snow cover in 2018 and the largest in 2009.Additionally,over the past 20 years,the snowmelt start time on the Mongolian Plateau ex-hibited a significant advancing trend at a rate of 0.18 days per decade(P<0.05),while the stable snow-cover area showed a delaying trend.(2)Spatially,snowmelt occurred significantly later in northern regions of the Mongolian Plateau compared to southern regions.Stable snow-cover areas were primarily concentrated in the western Mon-golia and northeastern Inner Mongolia,where snowmelt times were generally later.Approximately 64.9%of these areas showed an advancing trend in snowmelt,while regions with delaying trends were mainly distributed in the northwestern part of the study area.(3)Observational analysis at half-monthly scales from January during the winter season revealed that the movement of the snowmelt line demonstrated successive synchronicity with the-5℃and 0℃isotherms.Correlation coefficients between snowmelt line positions and temperature,except for the year 2018(with the least snow cover),generally fell within the higher range of 0.72 to 0.98,indicating that temperature is a key factor influencing the position of the snowmelt line.关键词
积雪融化时间/融雪线/等温线/气温响应/蒙古高原Key words
snow end day/snow line/isotherm/temperature response/Mongolian Plateau引用本文复制引用
牛锦,刘亚红,包刚,元志辉,佟斯琴,朝布嘎..蒙古高原积雪消融对气温的响应[J].干旱区研究,2025,42(7):1184-1195,12.基金项目
国家自然科学基金青年项目(42401431) （42401431）
内蒙古自然科学基金项目(2025MS04025) （2025MS04025）
内蒙古自治区科技计划项目(2022YFSH0034)资助 （2022YFSH0034）
