Effect of the Indo-Pacific Warm Pool on Lower-Stratospheric Water Vapor and Comparison with the Effect of ENSO

• DOI: 10.1175/jcli-d-17-0575.1
• Publication Date: 2017-11-21T18:00:37Z
• Authors: Fei Xie; Xin Zhou; Jianping Li; Quanliang Chen; Jiankai Zhang; Yang Li; Ruiqiang Ding; Jiaqing Xue; Xuan Ma
• Keywords: Tropopause; Quasi-biennial oscillation; Deep convection; Atmospheric convection

Abstract Time-slice experiments with the Whole Atmosphere Community Climate Model, version 4 (WACCM4), and composite analysis satellite observations are used to demonstrate that Indo-Pacific warm pool (IPWP) can significantly affect lower-stratospheric water vapor. It is found a warmer IPWP dries stratospheric vapor by causing broad cooling of tropopause, vice versa for colder IPWP. Such imprints in tropopause temperature driven combination variations Brewer–Dobson circulation stratosphere deep convection troposphere. Changes associated El Niño–Southern Oscillation (ENSO) reportedly have small zonal mean effect on strong zonally asymmetric effects temperature. In contrast, events uniform This because equatorial planetary waves forced latent heat release from project strongly onto ENSO but weakly events.