摘要
火星的冰盖是火星极区最显著的地貌特征之一,其季节性变化极为显著。研究表明,每年约有30%的火星大气二氧化碳通过极区的季节性凝华-升华过程参与极地物质循环。这种周期性变化驱动着极地表面与大气之间的物质交换过程。南极季节性冰盖(SPSC)在动态变化过程中可以覆盖数百万平方公里的广阔区域(从90°S到46°S左右),且在南极季节性冰盖的动态变化过程中对全球的大气压力和成分具有明显的影响。南极季节性冰盖的动态变化是影响火星大气环流的重要环节,同时也是研究火星气候变化的重要途径。本研究综合已有资料进行总结,从研究方法、变化过程、结果对比3个方面阐述了南极季节性冰盖的动态变化过程,将火星南极季节性冰盖的退化过程分为了几个不同的子阶段,梳理了不同子阶段中冰盖的特殊性与退化机制,并总结了现代火星气候的变化与南极季节性冰盖的关系。
The Martian polar caps represent one of the most prominent geomorphological features on Mars,exhibiting remarkable seasonal variability.Research indicates that approximately 30%of the Martian atmospheric CO2 annually participates in polar material cycles through seasonal deposition-sublimation processes at the poles.This periodic variation drives material exchange between the polar surface and atmosphere.The South Polar Seasonal Cap(SPSC)cover vast areas spanning millions of square kilometers during its dynamic evolution(from 90°S to=46°S).The dynamic of the SPSC exert significant influences on global atmospheric pressure and composition.A comprehensive understanding of SPSC dynamics is crucial component for deciphering Martian atmospheric circulation and an important pathway for studying Martian climate change.This paper synthesizes existing data to systematically examine the SPSC recession processes from three perspectives:(1)research methodologies,(2)recession processes,and(3)comparative analysis of results.We categorize the SPSC recession process into distinct sub-phases,elucidate the unique characteristics and recession mechanisms operative in each sub-phase,and summarize the relationship between modern Martian climate variations and SPSC dynamics.
作者
李志斌
刘建军
LI Zhibin;LIU Jianjun(National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《第四纪研究》
北大核心
2025年第4期894-902,共9页
Quaternary Sciences
基金
国家重点研发计划项目(批准号:2022YFF0503204)
中国科学院重点研究计划项目(批准号:ZDBS-SSW-TLC00102)共同资助。
关键词
火星
火星极区
火星季节性冰盖
火星气候
Mars
Martian polar regions
Martian polar seasonal caps
Martian climate
