DOI: 10.1007/s00382-017-3616-y
Scopus记录号: 2-s2.0-85015652479
论文题名: Identifying a key physical factor sensitive to the performance of Madden–Julian oscillation simulation in climate models
作者: Kim G.-U. ; Seo K.-H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-01-02 起始页码: 391
结束页码: 401
语种: 英语
英文关键词: Climate models
; Coupling between convection and circulation
; Cumulus parameterization scheme
; Madden–Julian oscillation
; YOTC/MJO-TF
; Zonal wind convergence
Scopus关键词: atmospheric convection
; climate modeling
; comparative study
; computer simulation
; convergence
; cumulus
; Madden-Julian oscillation
; numerical model
; parameter estimation
; performance assessment
; rainfall
; weather forecasting
; zonal wind
英文摘要: A key physical factor in regulating the performance of Madden–Julian oscillation (MJO) simulation is examined by using 26 climate model simulations from the World Meteorological Organization’s Working Group for Numerical Experimentation/Global Energy and Water Cycle Experiment Atmospheric System Study (WGNE and MJO-Task Force/GASS) global model comparison project. For this, intraseasonal moisture budget equation is analyzed and a simple, efficient physical quantity is developed. The result shows that MJO skill is most sensitive to vertically integrated intraseasonal zonal wind convergence (ZC). In particular, a specific threshold value of the strength of the ZC can be used as distinguishing between good and poor models. An additional finding is that good models exhibit the correct simultaneous convection and large-scale circulation phase relationship. In poor models, however, the peak circulation response appears 3 days after peak rainfall, suggesting unfavorable coupling between convection and circulation. For an improving simulation of the MJO in climate models, we propose that this delay of circulation in response to convection needs to be corrected in the cumulus parameterization scheme. © 2017, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109484
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Atmospheric Sciences, Pusan National University, Busan, 609-735, South Korea
Recommended Citation:
Kim G.-U.,Seo K.-H.. Identifying a key physical factor sensitive to the performance of Madden–Julian oscillation simulation in climate models[J]. Climate Dynamics,2018-01-01,50(2018-01-02)