Gulf Stream and Kuroshio Current are synchronized

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: http://doi.org/10.1126/science.abh3295. This is version 4 of this Preprint.

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Authors

Tsubasa Kohyama , Hiroaki Miura, Shoichiro Kido

Abstract

Observational records show that sea surface temperatures along the Gulf Stream and Kuroshio tend to synchronize at decadal time scales. This synchronization, which we refer to as the Boundary Current Synchronization (BCS), is reproduced in global climate models with high spatial resolution. Both in observations and model simulations, BCS is associated with meridional migrations of the atmospheric jet stream. Changes in the strength and path of the ocean currents driven by the jet shifts lead to the synchronicity of surface temperatures. Numerical simulations using a conceptual model and an atmospheric general circulation model are consistent with a notion that BCS is an interbasin air-sea coupled mode. The abnormally hot summer in 2018 over the Northern Hemispheric extratropics is explained by the positive phase of BCS.

DOI

https://doi.org/10.31223/osf.io/6c9bd

Subjects

Atmospheric Sciences, Climate, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics

Keywords

air-sea interaction, atmospheric jet stream, midlatitudes, western boundary current

Dates

Published: 2019-11-05 06:31

Last Updated: 2021-07-07 12:08

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License

Academic Free License (AFL) 3.0

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