세미나 연사 
김주완 교수님(공주대학교 대기과학과)
 세미나 장소 
과학관 553
 연도 
2017
 월 / 일 
5/30
 시간 
16:00

Title : Role of dynamics in the formation and variability of the tropical tropopause


Abstract:

The tropical tropopause is an important indicator of climate change, and it also actively contributes to climate variability by modulating composition of strong greenhouse gases through stratosphere-troposphere exchange. In this presentation, characteristics of the tropical tropopause and associated dynamical and physical mechanisms are examined and discussed using observations, idealized model, and general circulation model simulations. Fine-scale structure of the tropical tropopause is investigated using high-resolution temperature data from GPS radio occultation measurements. Then, the dynamic mechanism of the tropopause formation is rigorously tested and examined in the tropics using a dry primitive equation model. Finally, the characteristics of the tropical tropopause are examined in the state-of-art climate models that participated in the Coupled Model Intercomparison Project Phase 5 (CMIP5). Current climate models’ capability to reproduce the tropopause features is also discussed.


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