12月5日：重新评估森林生态系统在全球气候变化和区域水循环中的作用

主 讲 人：李百炼 教授

主 持 人：陈小勇 教授

开始时间：2016-12-5（周一）上午8:30

讲座地址：资环楼435会议室

主办单位：生态与环境科学学院 科技处

报告人简介：李百炼(B. Larry Li)教授，2015获普利高津金奖(Prigogine Gold Medal, 该奖每年只表彰一位对世界生态学做出卓越贡献的科学家,他是全球第12位获奖人), “生态复杂性”这一新生态学分支学科的奠基人, 美国加利福尼亚大学河滨分校生态学终身教授，国际生态与可持续发展研究中心主任，美国农业部-中国科技部农业生态与可持续发展联合研究中心共同主任;《Ecological Complexity》(Elsevier)创刊主编，《Journal of Arid Land》(Springer)杂志联合创刊主编；美国人类生态研究院院士 (IHE Fellow)，俄罗斯科学院外籍院士，美国科学促进会会士(AAAS Fellow), 德稻生态学大师, 世界生态高峰理事会主席. 在包括Nature、Science、PNAS 等权威性学术刊物发表论文200 余篇, Google Scholar截至2016年10月的H指数=43. 

报告摘要：Using a robust global precipitation database, we analyze coast-to-interior seasonal precipitation distributions over the world’s major forest regions. We find that the active functioning of boreal forests in summer is associated with an intense ocean-to-land moisture transport, which declines in winter when forest functioning is minimal. This seasonal switch manifests itself as a change in the exponential scale length of precipitation distribution, which exceeds 15×103 km in summer but decreases to (3–4)×103 km in winter. In equatorial rainforests, which are photosynthetically active throughout the year, annual precipitation remains approximately constant, while the coefficient of variation of monthly precipitation significantly declines toward the continent interior. Precipitation over forest during the periods of active forest functioning is always higher than over the adjacent ocean. Such precipitation patterns support the biotic pump concept according to which forest cover drives the ocean-toland atmospheric moisture transport on a continental scale.