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Title of Journal: Clim Dyn

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Abbravation: Climate Dynamics

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Springer-Verlag

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DOI

10.1007/978-94-011-3236-7_9

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1432-0894

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Air–sea coupling in the North Atlantic during summ

Authors: ZengZhen Hu Bohua Huang
Publish Date: 2006/01/31
Volume: 26, Issue: 5, Pages: 441-457
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Abstract

In this work we have investigated the evolution of the summer air–sea interaction in the North Atlantic Ocean and the physical processes involved using reanalysis data and model simulation It is found that an atmosphere disturbance over the North Atlantic Ocean in the preceding winter favors the buildup of a North Atlantic horseshoelike sea surface temperature anomaly SSTA pattern in the summer through modifying the northeast trade winds and changing ocean upwelling and downwelling The changed ocean condition SSTA upwelling and downwelling further intensifies the atmosphere disturbance as a positive feedback The thermal advection of the atmosphere disturbance weakens the SSTA pattern in the following autumn and winter The anomalous circulation associated with the air–sea interaction in the observations is characterized by a barotropic structure in the middle and high latitudes of the North Atlantic Ocean The baroclinic component is enhanced in the model simulation particularly in the seasons from summer to winter The life cycle of the air–sea interaction is about 1 year in both the observations and simulationsThe authors thank D Straus E Manzini and two anonymous reviewers for their suggestions and comments to significantly improve the manuscript We are grateful for the advice and support of J Shukla and L Bengtsson We also like to thank P Schopf for his help to develop the coupled model This work was supported by NOAA CLIVAR Atlantic Program NA169PI570 and NA04OAR4310115

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