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SUMMARY:EESS talk on "Polar Amplification\, Sea-Ice Melt and Ocean Circula
 tion changes: A Few of the Many Reasons to Understand the Arctic Better"
DTSTART:20190514T121500
DTEND:20190514T130000
DTSTAMP:20260430T123610Z
UID:82266de8c761d5101b7ed82d2058666bec5aca9281377e191d12ca0c
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Danièle Rod is the Executive Director of the Swiss Polar I
 nstitute. She studied political science and economy. Previously\, she was 
 Head of Division for International collaboration at SNF and Science and Te
 chnology Counsellor at the Swiss Mission to the EU in Brussels. Dr Samuel 
 Jaccard is SNF professor at the Institute of Geological Sciences and the O
 eschger Center for Climate Change Research (OCCR)\, University of Bern. Sa
 muel Jaccard is a geochemist with interests in unravelling the links betwe
 en polar ocean biogeochemistry and climate on various timescales\, ranging
  from the past million years to the present. In particular\, Jaccard is us
 ing a range of stable and radiogenic isotope methods to quantify biogeoche
 mical fluxes\, both at the land-ocean interface and in the ocean.\nAbstrac
 t:\nThe Arctic region  - and Greenland in particular - have both been con
 siderably affected by global warming. As a result of polar amplification\,
  temperatures have increased by more than 2-3 °C within the last decades 
 - well above the globally averaged temperature increase of 1°C.  One of 
 the most dramatic manifestations of warming in the Arctic relates to the s
 ubstantial decrease in sea-ice cover affecting oceanic heat uptake and mar
 ine biological production.\nFurthermore\, increasing temperatures contribu
 te to accelerate glacier melt both in the Arctic realm and in Greenland wi
 th meltwater contributing to sea-level rise and measurable large-scale oce
 an circulation changes. Increased nutrient and sediment supply associated 
 with glacial runoff modify coastal and open ocean ecosystems\, with shifti
 ng phytoplankton communities affecting the entire food chain\, including b
 irds and mammals. The warming environment also presents major challenges t
 o local communities\, notably affecting natural resources and infrastructu
 res.\nFrom this perspective\, furthering our understanding underlying the 
 complex interactions between the terrestrial biosphere\, the cryosphere\, 
 the ocean and atmosphere will offer opportunities to better preserve these
  unique ecosystems in the future. The Greenland Circumnavigation Expeditio
 n\, GLACE\, will take scientific teams from all over the world on a comple
 te circumnavigation of Greenland over a two-month period in August and Sep
 tember 2019.\n 
LOCATION:GR C0 01 https://plan.epfl.ch/?room=GRC001
STATUS:CANCELLED
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