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Reduction in tropical rainfall diurnal variation by global warming simulated by a 20‐km mesh climate model
Author(s) -
Kitoh Akio,
Arakawa Osamu
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2005gl023350
Subject(s) - precipitation , climatology , environmental science , diurnal temperature variation , global warming , morning , climate model , atmospheric sciences , climate change , oceanography , geology , meteorology , geography , medicine
A time‐slice global warming experiment was performed with a very high‐resolution (20‐km mesh) atmospheric general circulation model. Due to increased horizontal resolution, land‐sea distribution over the Indonesian Maritime Continent is well represented. A clear contrast in precipitation change at the end of the twenty‐first century is found over Borneo Island and the Java Sea: over the ocean morning precipitation decreases and evening precipitation increases, while over the island morning precipitation increases, resulting in reduced amplitude of rainfall diurnal variation over both land and ocean. Weakened land‐sea breeze circulation by global warming due to larger nighttime temperature increases over land than during the day contributes to this decreased rainfall diurnal variation.