摘要
文章基于LMD.MARS和LMD_MM_MARS模式,研究了火星地形对大尺度气候的影响,从全球模拟与区域降尺度视角进行了分析。LMD.MARS模拟结果表明,地形效应对火星全球平均地表温度影响较小(升温约0.3℃),但显著调控区域温度,如南半球海拉斯盆地和北半球亚马逊平原升温明显,而南北半球高纬区域呈现相反的温度响应;此外,地形效应改变了火星地表风场,显著减弱南北高纬西风,中纬地区风场由经向风转为盛行西风,并在热带区域形成跨赤道气流,促进大气沙尘在南北半球间的传输。大气沙尘分布表现出纬度迁移,南半球海拉斯盆地大气沙尘减少明显,而南极附近高纬地区大气沙尘增加显著。LMD_MM_MARS模式开展的有无奥林匹斯山地形的区域降尺度模拟(180 km、 60 km和20 km分辨率)进一步揭示了奥林匹斯山地形仅对局地风场有增强作用,但对更大范围内气候影响有限。
Using the LMD.MARS(MARS Global Climate Model)and LMD_MM_MARS(Mesoscale Mars Model),we investigate the role of Martian topography in shaping large-scale climate through global simulations and regional downscaling.LMD.MARS simulations reveal that topography has a minimal effect on the global mean surface temperature(ca.0.3℃ warming)but exerts a significant influence on regional climates,with pronounced warming in the southern Hellas Basin and northern Amazon Plain,while high-latitude regions display contrasting hemispheric responses.Topographic effects also reshape surface wind patterns,weakening high-latitude westerlies,transforming mid-latitude winds from meridional to zonal,and generating cross-equatorial flows that facilitate interhemispheric atmospheric dust transport.Atmospheric dust distribution shifts latitudinally,with marked reductions in the Hellas Basin and increases near the South Pole.LMD_MM_MARS downscaling simulations(180 km,60km,and 20km)further demonstrate that Olympus Mons topography amplifies local wind fields but has limited broader climatic impacts.
作者
孙咏
吴海斌
苏宝煌
秦小光
谭宁
丁林
Ehouarn MILLOUR
SUN Yong;WU Haibin;SU Baohuang;QIN Xiaoguang;TAN Ning;DING Lin;Ehouarn MILLOUR(State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China;State Key Laboratory of Lithospheric and Environmental Coevolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Institute of Tibetan Plateau Meteorology,Chinese Academy of Meteorological Sciences,Beijing 100081,China;Laboratoire de Météorologie Dynamique/Institut Pierre-Simon Laplace(LMD/IPSL),Sorbonne Université,Centre National de la Recherche Scientifique(CNRS),École Polytechnique,École Normale Supérieure(ENS),Campus Pierre et Marie Curie BC99,4 Place Jussieu,Paris 75005,France)
出处
《第四纪研究》
北大核心
2025年第4期831-838,M0001,共9页
Quaternary Sciences
基金
国家自然科学基金项目(批准号:42588201)
国家自然科学基金项目(批准号:92355002)
第二次青藏高原综合科学考察项目(批准号:2019QZKK0708)
青藏高原地球系统与资源环境全国重点实验室青年重大创新项目共同资助。
