Effect of recent Atlantic warming in strengthening Atlantic–Pacific teleconnection on interannual timescale via enhanced connection with the pacific meridional mode

摘要: The Atlantic warm pool (AWP), which features the highest sea surface temperature (SST) in western Hemisphere boreal summer to early fall, has been known have a significant influence on climate its surrounding regions. It is reported that AWP become warmer and warmer, so AWP–SST during couple of recent decades higher than any other period since twentieth century. Under increased mean AWP–SST, atmospheric responses anomalous are intensified, corresponds possibility deep convection formation. Through Rossby wave propagation induced by convection, signals able reach further west toward central North Pacific. At this moment, northerly winds introduced over Pacific, advects negative moist static energy (MSE) into subtropics simultaneously contributes SST cooling interacting with trade winds. Owing Gill-type response heating anomaly associated MSE, developed Such air–sea coupling persists throughout fall winter, leading Pacific meridional mode development following spring. Subsequently, PMM acts boost El Nino Southern Oscillation events. Coupled model experiments were carried out investigate extent warming strengthens Atlantic–Pacific interbasin teleconnection interannual timescales, it proven support observational analysis.