Dynamical downscaling simulation and future projection of summer rainfall in Taiwan: Contributions from different types of rain events

Wan-Ru Huang, Ya Hui Chang, Huang Hsiung Hsu, Chao Tzuen Cheng, Chia Ying Tu

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Summer rainfall in Taiwan is composed of four types of rain events: tropical cyclone (TC), frontal convection (FC), diurnal convection (DC), and other southerly convection (SC) that propagates from the nearby ocean. In this study, we accessed the present-day simulation (1979-2003) and future projection (2075-2099, the Representative Concentration Pathway 8.5 scenario) of rainfall in Taiwan by using the regional Weather Research and Forecasting model driven by the global High Resolution Atmospheric Model. The results indicated that the dynamical downscaling process adds value to the present-day simulation of summer rainfall in Taiwan and the contribution of different types of rain events. It was found that summer rainfall in Taiwan will increase in a warmer future and that this change was mainly due to an increase in SC rainfall (i.e., light rainfall event). The following trends in Taiwan rainfall were also predicted in a warmer future: (1) SC rainy days will increase because the intensified monsoonal flow facilitates the propagation of more SC toward Taiwan, (2) TC rainy days will decrease as the Western North Pacific subtropical high extends southwestward and prevents TC systems from passing over Taiwan, (3) DC rainy days will decrease in response to the increased local thermal stability, and (4) FC rainy days will show no significant changes. Moreover, all types of rainfall are projected to become more intense in the future due to the increased moisture supply in a warmer climate. These findings highlight how the rainfall characteristics in East Asia may change in response to climate change.

Original languageEnglish
Pages (from-to)13,973-13,988
JournalJournal of Geophysical Research
Volume121
Issue number23
DOIs
Publication statusPublished - 2016 Dec 16

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downscaling
rain
Taiwan
summer
Rain
convection
projection
rainfall
simulation
cyclones
hurricanes
tropical cyclone
tropical cyclone event
atmospheric models
climate change
weather
moisture
forecasting
climate
Convection

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Palaeontology

Cite this

Dynamical downscaling simulation and future projection of summer rainfall in Taiwan : Contributions from different types of rain events. / Huang, Wan-Ru; Chang, Ya Hui; Hsu, Huang Hsiung; Cheng, Chao Tzuen; Tu, Chia Ying.

In: Journal of Geophysical Research, Vol. 121, No. 23, 16.12.2016, p. 13,973-13,988.

Research output: Contribution to journalArticle

Huang, Wan-Ru ; Chang, Ya Hui ; Hsu, Huang Hsiung ; Cheng, Chao Tzuen ; Tu, Chia Ying. / Dynamical downscaling simulation and future projection of summer rainfall in Taiwan : Contributions from different types of rain events. In: Journal of Geophysical Research. 2016 ; Vol. 121, No. 23. pp. 13,973-13,988.
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