An improved ENSO simulation by representing chlorophyll-induced climate feedback in the NCAR Community Earth System Model.

ABSTRACT: The El Niño-Southern oscillation (ENSO) simulated in the Community Earth System Model of the National Center for Atmospheric Research (NCAR CESM) is much stronger than in reality. Here, satellite data are used to derive a statistical relationship between interannual variations in oceanic chlorophyll (CHL) and sea surface temperature (SST), which is then incorporated into the CESM to represent oceanic chlorophyll -induced climate feedback in the tropical Pacific. Numerical runs with and without the feedback (referred to as feedback and non-feedback runs) are performed and compared with each other. The ENSO amplitude simulated in the feedback run is more accurate than that in the non-feedback run; quantitatively, the Niño3 SST index is reduced by 35% when the feedback is included. The underl

SUBMITTER: Kang X 

PROVIDER: S-EPMC5719437 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature