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Tropical Cyclone Activities in Warm Climate with Quadrupled CO 2 Concentration Simulated by a New General Circulation Model
Author(s) -
Song Chanwoo,
Park Sungsu,
Shin Jihoon
Publication year - 2020
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
eISSN - 2169-8996
pISSN - 2169-897X
DOI - 10.1029/2019jd032314
Subject(s) - climatology , tropical cyclone , environmental science , convection , precipitation , atmospheric sciences , climate model , sea surface temperature , walker circulation , moisture , general circulation model , climate change , meteorology , geology , geography , oceanography
To understand the impacts of global warming on tropical cyclones (TCs), we compared various TC properties and environmental conditions during the pre‐industrial period with those in a warm climate with quadrupled CO 2 concentration using the Seoul National University Earth System Model Version 0 with a unified convection scheme (SEM0‐UNICON). TCs in warm climate are faster, stronger, and larger with more precipitation but are short‐lived and fewer than those in cold climate. Fewer TCs in warm climate are associated with the decreases in the climatological mean upward flow at 500 hPa ( ω 500 ) and the increase in saturation deficit at 600 hPa ( δ 600 ). In contrast, enhanced TC intensity is associated with the increases in sea surface temperature, upward ω 500 , column‐integrated water vapor, convective available potential energy, and horizontal moisture convergence below 700 hPa along TC tracks.