Investigation of Titan's meteorology in the light of the Cassini/Huygens mission by means of a general circulation model

土卫六是土星最大的卫星，它被厚厚的富含氮的大气层所包围，其热结构与地球相似。土卫六的大气层是在比较行星学的背景下研究气象学的一个杰出的自然实验室。像大气环流模式（GCMs）这样的综合大气模式已经对了解土卫六的大气发动机如何工作做出了很大贡献，但由于低层大气和地表数据的缺乏，常常导致数据解释的不确定性。正在进行的“卡西尼号”和“惠更斯号”任务揭开了土卫六低层大气的神秘面纱，为探索土卫六的大气和表面开辟了新的视角。本研究旨在了解土卫六动态气象观测资料及其对土卫六地表和外系地质的启示。该研究包括利用卡西尼号/惠更斯号的数据对现有GCM进行重大更新，研究观测到的风廓线的可能机制以及地表与大气之间的相互作用，以及对现有土卫六GCM进行基准测试。

Saturn s largest moon Titan is surrounded by a thick nitrogen-rich atmosphere with an Earth-like thermal structure. Titan s atmosphere represents an outstanding natural laboratory to investigate the meteorology in the context of comparative planetology. Comprehensive atmospheric models such as general circulation models (GCMs) have already contributed much to the understanding of how Titan s atmospheric engine may be working, but the scarcity of data from the lower atmosphere and surface often caused ambiguity in the data interpretation. The ongoing Cassini/Huygens mission at Titan is beginning to unveil the enigma of the lower atmosphere and opens new perspectives in the exploration of Titan s atmosphere and surface. The proposed investigation aims at understanding the observed data concerning the dynamic meteorology of Titan and its implication for Titan s surface and exogeneous geology. The study comprises a major update of the existing GCM with Cassini/Huygens data, investigating the possible mechanism of the observed wind profile and the interaction between the surface and atmosphere as well as benchmarking of existing Titan GCMs.