DOI: 10.1175/JCLI-D-15-0022.1
Scopus记录号: 2-s2.0-84947591060
论文题名: Boreal winter MJO teleconnection in the community atmosphere model version 5 with the unified convection parameterization
作者: Yoo C. ; Park S. ; Kim D. ; Yoon J.-H. ; Kim H.-M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 20 起始页码: 8135
结束页码: 8150
语种: 英语
英文摘要: The Madden-Julian oscillation (MJO), the dominant mode of tropical intraseasonal variability, influences weather and climate in the extratropics through atmospheric teleconnection. In this study, two simulations using the Community Atmosphere Model version 5 (CAM5)-one with the default shallow and deep convection schemes and the other with the unified convection scheme (UNICON)-are employed to examine the impacts of cumulus parameterizations on the simulation of the boreal wintertime MJO teleconnection in the Northern Hemisphere. It is demonstrated that the UNICON substantially improves the MJO teleconnection. When the UNICON is employed, the simulated circulation anomalies associated with the MJO better resemble the observed counterpart, compared to the simulation with the default convection schemes. Quantitatively, the pattern correlation for the 300-hPa geopotential height anomalies between the simulations and observation increases from 0.07 for the default schemes to 0.54 for the UNICON. These circulation anomalies associated with the MJO further help to enhance the surface air temperature and precipitation anomalies over North America, although room for improvement is still evident. Initial value calculations suggest that the realistic MJO teleconnection with the UNICON is not due to the changes in the background wind, but rather primarily to the improved tropical convective heating associated with the MJO. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50773
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Science and Engineering, Ewha Womans University, Seoul, South Korea; School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Pacific Northwest National Laboratory, Richland, WA, United States; School of Marine and Atmospheric Sciences, Stony Brook University, New York, NY, United States
Recommended Citation:
Yoo C.,Park S.,Kim D.,et al. Boreal winter MJO teleconnection in the community atmosphere model version 5 with the unified convection parameterization[J]. Journal of Climate,2015-01-01,28(20)