My main research interest has been always the Arctic sea ice. After studying sea ice dynamics with the AIDJEX group at Polar Science Center of University of Washington I completed my Ph.D. in this subject at Hokkaido University. I have conducted research in sea ice and its interaction with the ocean and atmosphere at the University of Tokyo, the NASDA of Japan (currently JAXA), NASA-GSFC, and the Lamont-Doherty Earth Observatory, which includes observational work in SHEBA and other field experiments. Since 2007 I have served as a professor at the Faculty of Science of Niigata University in Japan, mostly studying the stratospheric process through which the Arctic climate variability influences and is influenced by that in lower latitude.
It has been highly debated whether the Arctic sea ice loss has impacts on midlatitude weather and climate. There are two schools of thoughts. One argues for the presence of sea ice impact and the other for minimal or no impact. I will provide an overview on this subject, much from an observational viewpoint. Our observational record is rather short, but it is only realization of the physical world from which we make hypotheses and scrutinize underlying processes. In particular I will focus on a stratospheric pathway through which the Arctic can communicate with lower latitudes.
Arranged date for the seminar talk: Sep 23, 2019.
Bjeknes lecture room 4020, Jahnebakken 5.