摘要
地表温度是地球表面能量平衡的关键参数,在地表水热循环中发挥重要作用。蒙古高原作为欧亚大陆腹地的巨型热力枢纽,其地表温度动态对区域气候干旱化具有决定性作用。基于2003—2023年MODIS MYD11C3地表温度数据,分析蒙古高原昼夜地表温度(LST)的时空变化特征及驱动因素。结果表明:(1)蒙古高原呈显著的夜间不对称增温,白天地表温度以0.037°C/yr的速率不显著上升,而夜间则以0.058°C/yr的速率显著上升;(2)地表温度空间异质性显著,整体呈西南高、东北低的格局,与植被覆盖(EVI)呈极强的负相关(R<-0.95);(3)偏相关分析表明,气温是主导地表温度空间格局的核心正相关因子,植被(EVI、树木覆盖)、蒸散发及反照率的影响则表现出复杂的昼夜与空间分异。研究表明,气候变化与下垫面反馈对该区域热环境具有协同作用,研究结果可为蒙古高原畜牧业适应性管理及生态屏障建设提供科学依据。
Surface temperature is a key parameter in the Earth′s energy balance and plays an important role in surface water-heat cycle.As a giant thermal hub in the heart of the Eurasian continent,the dynamic surface temperature of the Mongolian Plateau has a decisive impact on regional climate aridification.Based on MODIS MYD11C3 surface temperature data from 2003 to 2023,this study analyzed the temporal and spatial changes of daytime and nighttime land surface temperature(LST)in the Mongolian Plateau and their driving factors.The results are as follows.(1)The Mongolian Plateau exhibits a significant asymmetric diurnal warming trend,with daytime surface temperature increasing at a rate of 0.037°C/yr,while nighttime surface temperature shows a significant increase at a rate of 0.058°C/yr.(2)The spatial heterogeneity of surface temperature is significant,with an overall pattern of higher temperatures in the southwest and lower temperatures in the northeast,showing a strong negative correlation with vegetation cover(EVI)(R<-0.95).(3)Partial correlation analysis indicates that air temperature is the core positive factor dominating the spatial pattern of surface temperature.The influences of vegetation(EVI,tree cover),evapotranspiration,and albedo exhibit complex diurnal-nocturnal and spatial differentiation.The study highlights the synergistic effects of climate change and land surface feedback on the thermal environment of the region.The results provide a scientific basis for adaptive management of pastoral activities and the construction of ecological barriers in the Mongolian Plateau.
作者
阿力亚
包刚
Aliya;BAO Gang(College of Geographical Science,Inner Mongolia Normal University,Hohhot 010022,China;Key Laboratory of Remote Sensing and Geographic Information System of Inner Mongolia Autonomous Region,Hohhot 010022,China)
出处
《内蒙古师范大学学报(自然科学版)》
2026年第2期145-153,共9页
Journal of Inner Mongolia Normal University(Natural Science Edition)
基金
国家自然科学基金青年资助项目“蒙古高原积雪动态及其对草地植被春季物候的影响研究”(42401431)。
关键词
地表温度
昼夜不对称
MODIS
蒙古高原
气候变化
surface temperature
diurnal-nocturnal asymmetry
MODIS
Mongolian Plateau
climate change
