Trans-basin Atlantic-Pacific connections further weakened by common model Pacific mean SST biases.

ABSTRACT: A robust eastern Pacific surface temperature cooling trend was evident between ~1990-2013 that was considered as a pronounced contributor to the global surface warming slowdown. The majority of current climate models failed to reproduce this Pacific cooling trend, which is at least partly due to the underrepresentation of trans-basin teleconnections. Here, we investigate whether common Pacific mean sea surface temperature biases may further diminish the Atlantic-Pacific trans-basin induced Pacific cooling. Our results suggest that background Pacific SST biases act to weaken the trans-basin teleconnection by strengthening the Atlantic atmospheric stability and reducing Atlantic convection. These Pacific SST biases also act to substantially undermine the positive zonal wind-SST feedback. Fur

SUBMITTER: Li C 

PROVIDER: S-EPMC7655828 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature