Southern Ocean water masses in CMIP6: Historical state and future projections ...

<!--!introduction!--> We examine the representation of Southern Ocean water mass properties, circulation and transformation in an ensemble of CMIP6 models, under historical climate forcing conditions and future climate scenarios. By using a dynamically defined water mass classification scheme...

Full description

Bibliographic Details
Main Authors: Meijers, Andrew, Sivankutty, Rahul, Rosser, Jonathan
Format: Conference Object
Language:unknown
Published: GFZ German Research Centre for Geosciences 2023
Subjects:
Online Access:https://dx.doi.org/10.57757/iugg23-1901
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017666
Description
Summary:<!--!introduction!--> We examine the representation of Southern Ocean water mass properties, circulation and transformation in an ensemble of CMIP6 models, under historical climate forcing conditions and future climate scenarios. By using a dynamically defined water mass classification scheme based on physical characteristics we are able to compare water masses across a range of models, well as within single models where water mass properties change under climate forcing. We find that under strong climate forcing scenarios the heat content of SubAntarctic Mode Water (SAMW), Antarctic Intermediate Water (AAIW) and Circumpolar Deep Water (CDW) all increase consistently across models, while the volume of Antarctic Bottom Water (AABW) declines significantly. Importantly this change is strongly modulated by using dynamic definitions. These analyses are complimented by Walin budgets, identifying the factors driving change in water mass volumes, transformation and formation rates. There is a consistent ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...