globalchange  > 气候减缓与适应
DOI: 10.1175/JCLI-D-17-0718.1
Scopus记录号: 2-s2.0-85048468618
论文题名:
Precipitation and moisture in four leading CMIP5 models: Biases across large-scale circulation regimes and their attribution to dynamic and thermodynamic factors
作者: Yang M.; Zhang G.J.; Sun D.-Z.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期:13
起始页码: 5089
结束页码: 5106
语种: 英语
英文关键词: Diagnostics ; Humidity ; Large-scale motions ; Model errors ; Precipitation
Scopus关键词: Atmospheric humidity ; Climate models ; Errors ; Moisture ; Plasma diagnostics ; Precipitation (chemical) ; Thermodynamics ; Coupled Model Intercomparison Project ; General circulation model ; Integrated water vapors ; Large scale motion ; Large-scale circulation ; Model errors ; Probability density function (pdf) ; Thermodynamic factors ; Probability density function ; atmospheric dynamics ; climate modeling ; computer simulation ; error analysis ; general circulation model ; humidity ; numerical model ; precipitation (climatology) ; probability density function ; thermodynamics
英文摘要: As key variables in general circulation models, precipitation and moisture in four leading models from CMIP5 (phase 5 of the Coupled Model Intercomparison Project) are analyzed, with a focus on four tropical oceanic regions. It is found that precipitation in these models is overestimated in most areas. However, moisture bias has large intermodel differences. The model biases in precipitation and moisture are further examined in conjunction with large-scale circulation by regime-sorting analysis. Results show that all models consistently overestimate the frequency of occurrence of strong upward motion regimes and peak descending regimes of 500-hPa vertical velocityω500. In a given ω500 regime, models produce too much precipitation compared to observation and reanalysis. But for moisture, their biases differ from model to model and also from level to level. Furthermore, error causes are revealed through decomposing contribution biases into dynamic and thermodynamic components. For precipitation, the contribution errors in strong upward motion regimes are attributed to the overly frequent ω500. In the weak upward motion regime, the biases in the dependence of precipitation on ω500 and the ω500 probability density function (PDF) make comparable contributions, but often of opposite signs. On the other hand, the biases in column-integrated water vapor contribution are mainly due to errors in the frequency of occurrence of, while thermodynamic components contribute little. These findings suggest that errors in the frequency of ω500 occurrence are a significant cause of biases in the precipitation and moisture simulation. © 2018 American Meteorological Society.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111500
Appears in Collections:气候减缓与适应

Files in This Item:

There are no files associated with this item.


作者单位: Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, China; Joint Center for Global Change Studies, Beijing, China; Scripps Institution of Oceanography, La Jolla, CA, United States; Department for Earth System Science, Tsinghua University, Beijing, China; Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, United States

Recommended Citation:
Yang M.,Zhang G.J.,Sun D.-Z.. Precipitation and moisture in four leading CMIP5 models: Biases across large-scale circulation regimes and their attribution to dynamic and thermodynamic factors[J]. Journal of Climate,2018-01-01,31(13)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Yang M.]'s Articles
[Zhang G.J.]'s Articles
[Sun D.-Z.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Yang M.]'s Articles
[Zhang G.J.]'s Articles
[Sun D.-Z.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Yang M.]‘s Articles
[Zhang G.J.]‘s Articles
[Sun D.-Z.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.