Scopus记录号: 2-s2.0-85043396045
论文题名: Future climate change enhances rainfall seasonality in a regional model of western Maritime Continent
作者: Kang S. ; Im E.-S. ; Eltahir E.A.B.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2019
卷: 52, 期: 2019-01-02 起始页码: 747
结束页码: 764
语种: 英语
英文摘要: In this study, future changes in rainfall due to global climate change are investigated over the western Maritime Continent based on dynamically downscaled climate projections using the MIT Regional Climate Model (MRCM) with 12 km horizontal resolution. A total of nine 30-year regional climate projections driven by multi-GCMs projections (CCSM4, MPI-ESM-MR and ACCESS1.0) under multi-scenarios of greenhouse gases emissions (Historical: 1976–2005, RCP4.5 and RCP8.5: 2071–2100) from phase 5 of the Coupled Model Inter-comparison Project (CMIP5) are analyzed. Focusing on dynamically downscaled rainfall fields, the associated systematic biases originating from GCM and MRCM are removed based on observations using Parametric Quantile Mapping method in order to enhance the reliability of future projections. The MRCM simulations with bias correction capture the spatial patterns of seasonal rainfall as well as the frequency distribution of daily rainfall. Based on projected rainfall changes under both RCP4.5 and RCP8.5 scenarios, the ensemble of MRCM simulations project a significant decrease in rainfall over the western Maritime Continent during the inter-monsoon periods while the change in rainfall is not relevant during wet season. The main mechanism behind the simulated decrease in rainfall is rooted in asymmetries of the projected changes in seasonal dynamics of the meridional circulation along different latitudes. The sinking motion, which is marginally positioned in the reference simulation, is enhanced and expanded under global climate change, particularly in RCP8.5 scenario during boreal fall season. The projected enhancement of rainfall seasonality over the western Maritime Continent suggests increased risk of water stress for natural ecosystems as well as man-made water resources reservoirs. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122467
Appears in Collections: 气候变化事实与影响
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作者单位: Singapore-MIT Alliance for Research and Technology (SMART), Center for Environmental Sensing and Modeling (CENSAM), Singapore, Singapore; Division of Environment and Sustainability, Department of Civil and Environmental Engineering, Academic Building 3594, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong; Ralph M. Parsons Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
Recommended Citation:
Kang S.,Im E.-S.,Eltahir E.A.B.. Future climate change enhances rainfall seasonality in a regional model of western Maritime Continent[J]. Climate Dynamics,2019-01-01,52(2019-01-02)