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Kohei Takatama and Niklas Schneider

thermal effect, we used a regional atmospheric model in a series of experiments with and without ocean currents and SST fronts. We focus on the Kuroshio in the winter East China Sea, because current speeds are large and located away from land. The surface wind stress response and the modified coupling coefficients are investigated in sections 3 and 4 , respectively. Responses in the MABL and the lower troposphere are explored in section 5 . There are clear signatures in the boundary layer, but

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Larry W. O’Neill, Tracy Haack, Dudley B. Chelton, and Eric Skyllingstad

” (p. 2163). Previous work has indicated that storm tracks occur preferentially along SST frontal zones associated with western boundary currents (e.g., Hoskins and Valdes 1990 ; Nakamura et al. 2008 ; Brayshaw et al. 2009 ; Kuwano-Yoshida et al. 2010 ; Small et al. 2014 ), due at least in part to enhanced baroclinicity and land–sea temperature contrast. In the northwest Atlantic, Blender et al. (1997) showed that storms tend to cluster along two main paths: one approximately along the mean

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Niklas Schneider and Bo Qiu

gradients in observations ( Chelton and Xie 2010 ) and in high-resolution numerical models ( Seo et al. 2007 ; Song et al. 2009 ; Bryan et al. 2010 ). Kinematically, this results from gradients of the frontally induced surface stress direction that diminish the wind stress curl but enhance the wind stress divergence ( O’Neill et al. 2010a ). Here, we seek to dynamically explain these observations using a linearized model for the atmospheric boundary layer that includes advection by background Ekman

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