報告題目：Rapid Urbanization and Heavy Rainfall in East China
報告人：張大林 美國馬里蘭大學(xué) 教授
報告摘要：The urban heat island (UHI) effects tend to produce more rainfall on its downwind side than that on the other sides, but alone could hardly account for the generation of heavy rainfall. In this talk, I will first show a 44-yr (i.e., 1975-2018) climatology of the summertime heavy rainfall over East China, showing a significant correlation between rapid urbanization and increased heavy rainfall events during the past two decades. Then, I will present a case study of the influences of the UHI effects associated with the Shanghai-Suzhou-Wuxi-Changzhou city belt on generating an afternoon heavy rainfall event. This event occurred under the influences of weak southwesterly monsoonal flows on 26 July 2018 over coastal Nantong that is 70–100 km downwind from the city belt. Several cloud-permitting model simulations with the finest grid spacing of 1 km are performed. Results show i) the initiation of convective storms along the city belt, and their subsequent downstream propagation, leading to the generation of heavy rainfall over Nantong; and ii) the generation of little rainfall over the plain area on the north of the city belt, after replacing urban and built-up land uses by croplands over the region; and iii) only small contribution of Nantong’s UHI effects to the heavy rainfall event. The above results support the recent IPCC (2021) Sixth Assessment Report, stating that rapid urbanization has contributed to “increases in mean and extreme precipitation over and downwind of the city, especially in the afternoon and early evening (medium confidence)”.
報告人簡(jiǎn)介：張大林教授于1976年畢業(yè)于中國科學(xué)技術(shù)大學(xué)近代力學(xué)系，1981和1985年在美國賓州州立大學(xué)氣象系分別獲理學(xué)碩士和博士學(xué)位。1986－1988年在美國國家大氣科學(xué)研究中心（NCAR）從事博士后研究。 1989－1996年在加拿大麥吉爾大學(xué)任助理、副教授；自1996年8月起，在美國馬里蘭大學(xué)大氣-海洋科學(xué)系任副、正教授。長(cháng)期從事大氣科學(xué)本科及研究生教育和中尺度氣象、雷暴災害天氣（如暴雨，暴風(fēng)雪、臺風(fēng)和城市熱島效應）過(guò)程的動(dòng)力特征及結構演變規律的科學(xué)研究以及災害性天氣數值預報模式的發(fā)展、改進(jìn)。截至2023年12月，共發(fā)表SCI論文200多篇。在2006年湯森路透 (Thomson Reuters) 科技信息集團對“過(guò)去十年間熱帶氣旋研究論發(fā)表總數排名”為全球第四，“總引用次數排名”和“單篇引用次數排名”均為全球第六。1991年獲美國氣象學(xué)會(huì )杰出青年科學(xué)獎（The Clarence Meisinger Award），“for pioneering work in the understanding and numerical modeling of mesoscale convective weather systems。”1997年入選為英國皇家氣象學(xué)會(huì )會(huì )士，2006年入選為美國氣象學(xué)會(huì )會(huì )士，2006和2015年二次獲美國國家宇航局（NASA）集體成就獎。曾經(jīng)擔任《大氣科學(xué)進(jìn)展》共同主編，中國氣象學(xué)會(huì )《氣象學(xué)報》中、英文刊副主編，美國氣象學(xué)會(huì )《天氣與預報》副編和編輯以及《天氣月評》副編。
報告時(shí)間：2023年12月29日 10:00
報告地點(diǎn)：2號樓1201
主持人：王春在 研究員
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