globalchange  > 气候减缓与适应
DOI: 10.1007/s00382-018-4125-3
WOS记录号: WOS:000460619200002
论文题名:
Impacts of model spatial resolution on the vertical structure of convection in the tropics
作者: Bui, Hien Xuan1; Yu, Jia-Yuh1; Chou, Chia2,3
通讯作者: Yu, Jia-Yuh
刊名: CLIMATE DYNAMICS
ISSN: 0930-7575
EISSN: 1432-0894
出版年: 2019
卷: 52, 期:1-2, 页码:15-27
语种: 英语
WOS关键词: GLOBAL WARMING IMPACTS ; CLIMATE SIMULATIONS ; CUMULUS CONVECTION ; MOMENTUM TRANSPORT ; PARAMETERIZATION ; PRECIPITATION ; CIRCULATION ; CLOUD ; SENSITIVITY ; MECHANISMS
WOS学科分类: Meteorology & Atmospheric Sciences
WOS研究方向: Meteorology & Atmospheric Sciences
英文摘要:

This study examined the impacts of model horizontal resolution on vertical structures of convection in the tropics by performing sensitivity experiments with the NCAR CESM1. It was found that contributions to the total precipitation between top-heavy and bottom-heavy convection are different among various resolutions. A coarser resolution tends to produce a greater contribution from top-heavy convection and, as a result, stronger precipitation in the western Pacific ITCZ; while there is less contribution from bottom-heavy convection and weaker precipitation in the eastern Pacific ITCZ. In the western Pacific ITCZ, where the convection is dominated by a top-heavy structure, the stronger precipitation in coarser resolution experiments is due to changes in temperature and moisture profiles associated with a warmer environment (i.e., thermodynamical effect). In the eastern Pacific ITCZ, where the convection is dictated by a bottom-heavy structure, the stronger precipitation in finer resolution experiments comes from changes in convection structure (i.e., dynamic effect) which favors a greater contribution of bottom-heavy convection as the model resolution goes higher. The moisture budget analysis further suggested that the very different behavior in precipitation tendencies in response to model resolution changes between the western and eastern Pacific ITCZs are determined mainly by changes in convective structure rather than changes in convective strength. This study pointed out the importance of model spatial resolution in reproducing a reasonable contribution to the total precipitation between top-heavy and bottom-heavy structure of convection in the tropical Pacific ITCZs.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/125071
Appears in Collections:气候减缓与适应

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作者单位: 1.Natl Cent Univ, Dept Atmospher Sci, Taoyuan, Taiwan
2.Acad Sinica, Res Ctr Environm Changes, Taipei, Taiwan
3.Natl Taiwan Univ, Dept Atmospher Sci, Taipei, Taiwan

Recommended Citation:
Bui, Hien Xuan,Yu, Jia-Yuh,Chou, Chia. Impacts of model spatial resolution on the vertical structure of convection in the tropics[J]. CLIMATE DYNAMICS,2019-01-01,52(1-2):15-27
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