Wednesday, February 1, 2017, 3:30pm to 4:45pm
Pierce Hall 100F, 29 Oxford St., Cambridge, MA
DING Yihui, Professor and Special Advisor on Climate Change, China Meteorological Administration; Vice-Chairman, China Expert Panel on Climate Change
Sponsored by China Project, Harvard Paulson School of Engineering and Applied Sciences
Due to the impacts of natural and anthropogenic climate change as well as the effects of urbanization, the frequency of occurrence and intensity of heavy urban rainfalls in megacities of China have demonstrated significant long-term variations. Extremely intense rainfall events have shown an increasing trend and their intensity has greatly exceeded historical thresholds for the past 60 years, especially in the southern megacities (e.g., Shanghai and Guangzhou). Detection and attribution studies have shown that natural climate change (especially the weakening of the East Asian summer monsoon) is associated with the spatial patterns of extremely intense rainfall events. The effects of anthropogenic climate change (climate warming) and urbanization have greatly enhanced the regional or local frequency and intensity of extreme rainfall events as well as focusing them in urban central areas, thus increasing risks of severe flooding disasters in urban areas.