Pavel Ya. Groisman is a UCAR Project Scientist at the NOAA/NESDIS National Climatic Data Center. During the past three years he has been a Northern Eurasia Earth Science Partnership Initiative (NEESPI) Project Scientist and editor of the NEESPI Science Plan. During the past two decades, Dr. Groisman has been prominent in the Intergovernmental Panel on Climate Change (IPCC) Scientific Assessment activities. He has been a contributing author to all four IPCC Assessment Reports and to the recently completed Arctic Climate Impact Assessment focusing on climatic changes during the period of instrumental observations. His current research interests include studying changes in extreme events frequency and intensity over North America and Eurasia.