New insights into air-sea fluxes and their role in Subantarctic Mode Water formation

The formation of Subantarctic Mode Water SAMW in the Southern Ocean plays a key role in the global oceanic uptake and storage of anthropogenic heat and carbon. Wintertime ocean surface heat loss is a dominant driver of Subantarctic Mode Water formation and variability, but wintertime air-sea flux ob...

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Bibliographic Details
Published in:Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Main Author: Tamsitt, V.
Other Authors: National Science Foundation, Climate Program Office
Format: Article in Journal/Newspaper
Language:English
Published: The Royal Society 2023
Subjects:
Online Access:http://dx.doi.org/10.1098/rsta.2022.0066
https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2022.0066
https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2022.0066
Description
Summary:The formation of Subantarctic Mode Water SAMW in the Southern Ocean plays a key role in the global oceanic uptake and storage of anthropogenic heat and carbon. Wintertime ocean surface heat loss is a dominant driver of Subantarctic Mode Water formation and variability, but wintertime air-sea flux observations in the Southern Ocean are extremely sparse. Recent advances in our understanding of the role of air-sea fluxes in Subantarctic Mode Water Formation from novel ocean observations are summarized here, particularly the role of synoptic atmospheric extreme events, and the drivers of interannual variations in SAMW. These advances in understanding have important implications for variability in Southern Ocean heat and carbon uptake, and can inform future Southern Ocean observing system design. This article is part of a discussion meeting issue ‘Heat and carbon uptake in the Southern Ocean: the state of the art and future priorities’.