应西部环境与气候变化研究院陈发虎教授邀请，美国科罗拉多大学（University of Colorado）Mark Williams教授来我校交流访问，并作学术报告。
报告题目：Stable isotopes provide quantitative insights into surface/groundwater interactions in mountain catchments, from desert to permafrost regions.
Dr. Mark Williams is a professor of Geography and a fellow at the Institute of Arctic and Alpine Research, University of Colorado, Boulder, USA. He is a former editor of the journal Arctic, Antarctic, and Alpine Research. He is also the former chair of the AGU Cryosphere Science focus group. He is the PI of the NSF-funded Niwot Ridge Long-Term Ecological Research (NWT LTER) program, the only alpine site in that program. He is also on the LTER executive committee, and is the lead on developing an integrated data management program for the new NSF-funded Critical Zone Observatory program. His research interests are in snow hydrology and surface/groundwater interactions in mountain catchments.