Winter in the Changing Arctic: Overwintering Onboard RV Polarstern - Science and Stories From Mosaic

Speaking: Julia Grosse, Biological Oceanographer at the GEOMAR Helmholtz Centre for Ocean Research Kiel

Event Type: Webinars and Virtual Events

When: 23 November 2020

Where: Online: 9:00-10:00 am AKST, 1:00-2:00 pm EST

Find out more: 
Link to OneNOAA Science Seminar Series



This talk is about my first hand experience overwintering onboard RV Polarstern in the Central Arctic Ocean. In fall 2019 the largest Arctic research expedition set out to be trapped in the ice for an entire year to fill the data gaps. The MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) campaign onboard the German icebreaker POLARSTERN drifted across the Central Arctic Ocean so an international team from 20 countries could study atmospheric processes, ice and ocean physics, biogeochemical cycles and ecosystem changes. The winter leg from November to March was defined by low temperatures and constant darkness but also by lead openings and buildup of pressure ridges, demonstrating that the “New Arctic” is not just a concept anymore but that it is already a reality.


Dr. Julia Grosse is a member of the Biological Oceanography Group in the Marine Biogeochemistry Division at GEOMAR and a postdoc in the Micro-ARC project. She is a phytoplankton ecologist/ biogeochemist interested in the drivers of phytoplankton productivity, the consequences on the cycling of organic matter (especially individual compounds such as amino acids and carbohydrates) and the repercussions for the microbial loop as well as food webs.


This seminar is part of NOAA's EcoFOCI bi-annual seminar series focused on the ecosystems of the North Pacific Ocean, Bering Sea and U.S. Arctic to improve understanding of ecosystem dynamics and applications of that understanding to the management of living marine resources. Since Oct 21, 1986, the seminar has provided an opportunity for research scientists and practitioners to meet, present, develop their ideas and provoke conversations on subjects pertaining to fisheries-oceanography or regional issues in Alaska's marine ecosystems, including the US Arctic.Visit the EcoFOCI webpage for more information,

Seminar Contact:
Heather Tabisola (heather.tabisola [at] and Jens Nielsen (jens.nielsen [at]

Remote Access:

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United States: +1 (872) 240-3311
Access Code: 891-851-101

Find out more: 
Link to OneNOAA Science Seminar Series