报告人：Anna Wåhlin（瑞典哥德堡大学 特聘教授）

时间：2023.12.15 15:00-16:30

Zoom会议：929-089-73492

密码：见邮件或班级通知

报告人简介

Wåhlin is a Professor of Physical Oceanography at the Department of Marine Sciences, University of Gothenburg. Her research focus is in the field of Polar Oceanography, mostly in the Southern Ocean, and focused on dynamics of polar seas including physical oceanography, ocean circulation, topographic effects, ice shelf melt processes and air-sea-ice interaction. When Wåhlin was appointed professor in 2015 she became Sweden's first female full Professor of Oceanography. Wåhlin is project leader for Sweden's national AUV infrastructure funded by the Knut and Alice Wallenberg Foundation. This AUV became the world's first to venture under Thwaites glacier, Antarctica, in 2019.Wåhlin was between 2015-2017 co-chair of the joint Scientific Committee on Antarctic Research (SCAR) and SCOR initiative Southern Ocean Observing System (SOOS). She is since 2021 an editor for the AGU journal Journal of Geophysical Research - Oceans, and served as Associate Editor for the journal Advances in Polar Science during 2016 - 2021. Her awards include receiving the Albert Wallin science prize from the Royal Society of Arts and Sciences (KKVS) in Gothenburg 2018, being a Fulbright Scholar (2007-2008),receiving a Crafoord Research Stipend from the Swedish Royal Academy of Science (2010), being a SCAR visiting professor (2013). In 2021 she was appointed Distinguished Professor by the Swedish Research Council, which will fund research about Antarctic ice shelves at the University of Gothenburg until 2031.

报告简介

All research areas related to ice-ocean boundary processes have historically suffered from a great shortage of data against which to calibrate and sanity-check models of varying complexities. The advent of satellite-born sensors of higher and higher accuracy and resolution has led to a surge of new knowledge in this field, in particular regarding mass budgets and the balance between freezing and melting on continental scales. There is also several examples of research breakthroughs where we beforehand did not even know what to look for - such as the role of the subglacial lakes, and their connection to each other via subglacial river systems. Due to the large scales it is simply not possible to reproduce the relevant physics of these environments except in computer simulations. In combination with a severe shortage of data this means that it is not unusual that new types of data give rise to new research fields and substantial breakthroughs, a situation almost comparable to planetary explorations. In this seminar we show an overview of some initial results from a set of unique data sets from the Antarctic ice shelves, including the knowledge that the ice shelf fronts block much of the wind-driven currents but let density-driven currents through and that there is a previously unknown connection below Thwaites ice shelf through which warm water flows from Pine Island Bay to Thwaites Ice Tongue.