Westerly Jet Biases and the Effects of Sea Surface Temperature Biases (IMAGE)

Ehime University

Westerly Jet Biases and the Effects of Sea Surface Temperature Biases

Caption

(a) The upper panel compares the latitude of the North Pacific westerly jet when observed SSTs are prescribed (red) and when SSTs are simulated by climate models (blue). Black indicates the jet latitude based on observational data. The green bars in the lower panel show the differences between the two simulations; in 34 of 35 models, the jet is located farther south when SSTs are simulated by climate models. (b–d) Biases in the westerly jet and differences between the two simulations. (e–j) Changes in the westerly jet in experiments with the SST biases shown in Figure 1. In particular, the northwestern Pacific SST bias (h) reproduces the southward shift of the jet.

Credit

Yusuke Ushijima (Ehime University)

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