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The CANARI Science Programme and HadGEM3 Large Ensemble

Authors

Schiemann,  Reinhard
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Shaffrey,  Len
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Lister,  Grenville
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Hatcher,  Rosalyn
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Wilson,  Simon
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Lawrence,  Bryan
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Hodson,  Dan
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Cole,  Jeffrey
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Schiemann, R., Shaffrey, L., Lister, G., Hatcher, R., Wilson, S., Lawrence, B., Hodson, D., Cole, J. (2023): The CANARI Science Programme and HadGEM3 Large Ensemble, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-2065


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018769
Abstract
Large ensembles of climate model simulations are key tools for assessing climate risks, separating internal variability from external forcing, and interpreting the observational record. Here we present the plans and production status of a Large Ensemble based on the HadGEM3 (Hadley Centre Global Environment Model version 3) climate model. This 40-member Large Ensemble uses HadGEM3 at the N216 atmosphere resolution (about 60 km at midlatitudes) and at 1/4° in the ocean. All-forcings experiments for the period 1950-2100 are conducted and follow the CMIP6 historical and SSP3-7.0 protocols. This initiative is part of the recently started UK NERC multi-centre project CANARI (Climate change in the Arctic-North Atlantic Region and Impacts on the UK). CANARI aims to advance understanding of the impacts on the UK arising from climate variability and change in the Arctic-North Atlantic region, with a focus on extreme weather and the potential for rapid, disruptive change. While we aim for the new Large Ensemble to become a resource for a wide range of applications, it will support addressing the CANARI science questions in particular. These questions are concerned with, for example, the (i) projected Arctic change and potential lower-latitude influences through atmospheric or oceanic pathways, (ii) the projected change in the large-scale (North Atlantic) ocean/atmosphere circulation, its drivers, and interaction with weather systems, and (iii) projected impacts on the UK arising from extreme weather (windstorms and flooding, blocking, heatwaves and droughts). This poster invites discussion on all aspects of CANARI and applying the new Large Ensemble.