Ice Sheets: Weather versus Climate

Category
IASC-Funded activity - Cross-Cutting
Date
23 August 2022 - 24 August 2022
Venue
Reykjavik, Iceland

 A 1.5-day ISMASS workshop to be held in Reykjavik, Iceland, 23-24 August 2022, sponsored by CliC, IASC and SCAR and affiliated with Cryosphere 2022

The last two decades have seen various unusual changes in the ice sheets, with the breakup of massive ice shelves from the Antarctic Peninsula and several major surface melt events in Greenland perhaps being most iconic. But how reflective are short-term extreme events of longer-term change and what is role of external forcing (e.g. climate change) versus internal variability (e.g. short-term variations in atmospheric and oceanic circulation and ice dynamics)? This 1.5-day workshop will explore the degree to which short-term fluctuations and extreme events in the ice sheets (both Greenland and Antarctica) in the last two decades reflect their longer-term evolution and response to ongoing climate change. Considerable recent progress, summarised in the Intergovernmental Panel on Climate Change’s AR6 WG1 August 2021 report, has been made on current state-of-the-science understanding of ice-sheet change. However, despite amplified global warming that has recently occurred over Greenland and around the Antarctic Peninsula, significant uncertainties remain concerning mass changes of the ice sheets during the rest of this century. Two major open questions relate to dynamic mass losses and potential non-linear feedbacks from Antarctica but also melt- and dynamic- related feedbacks from Greenland. We will consider the interplay of forcings from the ocean and atmosphere and their interactions with ice-sheet changes on timescales of days to centuries. Information on the historical mass changes of both Greenland and Antarctica before the modern satellite era is distinctly limited but may be improved through the recent availability of new datasets, whilst the modelling community has embraced advancing computer capability and novel simulation approaches. We will discuss recent innovations and recommendations for the next 5-10 years that are required in observations, process studies and modelling efforts to make further major breakthroughs in understanding how ice sheets change and the resulting local to global impacts: for example in sea-level rise and extreme weather. Fully realising advances in climate and ocean models, as well as ice-sheet modelling, is an essential part of improving the understanding of ice-sheet changes and sensitivity. This workshop will consist of a mix of invited keynote talks and panel/discussion sessions that will address these crucial issues from a multi-disciplinary perspective.

The Ice Sheets: Weather versus Climate Workshop is co-funded through the IASC cross-cutting funds with contributions from the IASC Atmosphere WG, Cryosphere WG and Marine WG

 
 

All Dates

  • From 23 August 2022 to 24 August 2022

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