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            聯系我們 英文版

            Dynamics and Forcing of Monsoon rainfall: energy viewpoint and common pitfalls

            時間:2023年09月25日 18:50

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            時 間:2023年9月27日(周三)中午12:00

            主 講: Mahyar Mohtadi教授

            地 點:廈門大學翔安校區周隆泉樓A3-206

            報告嘉賓簡介:PD Dr. Mahyar Mohtadi is a palaeooceanographer and palaeoclimatologist specializing in past climate change with an emphasis on reconstructing the ocean circulation and the hydrological cycle of the Indo-Pacific tropics to subtropics from marine sedimentary archives combined with model simulations. The body of his research activities is devoted to the hydroclimate of the Pacific and Indian Ocean realms by studying the long-term evolution of, and the interaction between, the coupled atmosphere-ocean climate phenomena inherent to these basins such as the Australasian monsoon systems, the Indian Ocean Dipole, and El Ni?o-Southern Oscillation. He is the head of the working group “Low-Latitude Climate Variability” at the Center of Marine Environmental Sciences (MARUM), University of Bremen, Germany. Dr. Mohtadi is author and coauthor of over 70 articles in scientific journals such as Nature, Nature Geoscience, PNAS and Paleoceanography and Paleoclimatology.

            摘要:Modelling efforts are critical to understand the dynamics and the competing impacts of different forcing mechanisms on monsoon rainfall and suggest a substantial regional character. However, simulating past monsoon rainfall changes remains a difficult task, where models show a large spread in regional rainfall amount and differ from reconstructions. For instance, the sign of change in temperature as the main control on rainfall is different between model simulations and proxy-based reconstructions during the interglacial maxima, suggesting erroneous simulations of the fundamental interplay between insolation, temperature and rainfall. On the other hand, the vast majority of monsoon reconstructions lacks a convincing scenario of the past monsoon dynamics by neglecting the energy viewpoint of the individual monsoon systems and therefore, fails to explain how external energy was translated to rainfall. In this talk I will present some typical pitfalls, and means to overcome a number of the common mistakes in the paleoclimate community.

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