Changes In Atmospheric Heating And Holocene South Asian Summer Monsoon
About the Event:
Paleoclimate data provide insights to understanding extreme changes in the characteristics of global monsoons. Due to its strength and potential societal impact, Asian monsoon system has a longstanding history of being special interest to research community. The recent development of both observation and modeling techniques is useful to test existing climate thinking. We will start out by looking at Asian summer precipitation from a simple statistical relationship to identify monsoon regime and then zoom in to South Asian monsoon system. On orbital timescale, an increase in summer insolation is thought to strengthen northern hemisphere summer monsoon over land (Battisti et al., 2014; Wang et al., 2016). We evaluate the relative influence of perihelion precession and high obliquity on Holocene Asian summer monsoon expression from a numerical model aspect. We will present the importance of atmospheric heating changes over the Tibetan Plateau in driving the South Asian monsoon that would have implications in explaining the asynchronous timing existing in paleoclimate records.
About the Speaker:
Dr Shih-Yu Lee is an earth system scientist with a background training in climate modeling and geochemistry. She has a broad interest in climate change of the past and future, particularly, low-high latitude climate teleconnection, ocean-atmosphere interactions, and climate dynamics. Specifically, she employs both climate models and geochemical tools and tries to answer how different factors influence climate change, what the past can tell us the way climate system works, and how future climate will impact the environment and society.
Shih-Yu is an assistant research fellow in Research Center of Environmental Changes, Academia Sinica, Taiwan. She has a BSc degree in Earth Sciences from National Taiwan Normal University and a MSc degree in Oceanography from National Taiwan University. She received a PhD in Oceanography from University of Michigan, Ann Arbor, and previously worked in UC-Berkeley as a postdoc researcher.