Far-reaching effects of the Hawaiian Islands in the CCSR/NIES/FRCGC high-resolution climate model

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Abstract

[1] For the first time, using a high-resolution atmosphere-ocean coupled general circulation model (CGCM), we succeed in reproducing the far-reaching effects of the Hawaiian Islands, recently showed by satellite observations. The model reproduces the distributions of sea surface temperature (SST), surface winds and cloud liquid water (CLW) in the wake of the Hawaiian Islands. It is revealed that these distributions are caused by the Hawaiian Lee Counter Current (HLCC) and that this current is driven by the wind-curls induced by the orographic effect of the islands, as suggested from an observational study. It is also shown that wind changes around the Hawaiian Islands can further affect the speed of the North Equatorial Current (NEC) and SST over the current, and intra-annual variability in CLW to the west of the islands is governed, not only by SST but also by wind speed.

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