Projected change in East Asian summer monsoon by dynamic downscaling: Moisture budget analysis

Title
Projected change in East Asian summer monsoon by dynamic downscaling: Moisture budget analysis
Author(s)
정춘용; 신호정; 장찬주; 김형진
KIOST Author(s)
Jang, Chan Joo(장찬주)
Publication Year
2015-08-03
Abstract
The summer monsoon considerably affects water resource and natural hazardsincluding flood and drought in East Asia, one of the worlds most densely populatedarea. In this study, we investigate future changes in summer precipitation over EastAsia induced by global warming through dynamical downscaling with the WeatherResearch and Forecast model. We have selected a global model from the CoupledModel Intercomparison Project Phase 5 based on an objective evaluation for EastAsian summer monsoon and applied its climate change under RepresentativeConcentration Pathway 4.5 scenario to a pseudo global warming method. Unlike theprevious studies that focused on a qualitative description of projected precipitationchanges over East Asia, this study tried to identify the physical causes of theprecipitation changes by analyzing a local moisture budget. Projected changes in precipitation over the eastern foothills area of Tibetan Plateau including Sichuan Basin and Yangtze River displayed a contrasting pattern: a decrease in its northern area and an increase in its southern area. A local moisture budget analysis indicated the precipitation increase over the southern area can be mainly attributed to an increase in horizontal wind convergence and surface evaporation. On the other hand, the precipitation decrease over the northern area can be largely explained by horizontal advection of dry air from the northern cor EastAsia induced by global warming through dynamical downscaling with the WeatherResearch and Forecast model. We have selected a global model from the CoupledModel Intercomparison Project Phase 5 based on an objective evaluation for EastAsian summer monsoon and applied its climate change under RepresentativeConcentration Pathway 4.5 scenario to a pseudo global warming method. Unlike theprevious studies that focused on a qualitative description of projected precipitationchanges over East Asia, this study tried to identify the physical causes of theprecipitation changes by analyzing a local moisture budget. Projected changes in precipitation over the eastern foothills area of Tibetan Plateau including Sichuan Basin and Yangtze River displayed a contrasting pattern: a decrease in its northern area and an increase in its southern area. A local moisture budget analysis indicated the precipitation increase over the southern area can be mainly attributed to an increase in horizontal wind convergence and surface evaporation. On the other hand, the precipitation decrease over the northern area can be largely explained by horizontal advection of dry air from the northern co
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25351
Bibliographic Citation
12th Annual Meeting of Asia Oceania Geosciences Society (AOGS), pp.1, 2015
Publisher
Asia Oceania Geosciences Society
Type
Conference
Language
English
Publisher
Asia Oceania Geosciences Society
Related Researcher
Research Interests

upper ocean dynamics,regional climate modeling,ocean climate change,해양상층역학,지역기후모델링,해양기후변화

Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse