globalchange  > 气候变化事实与影响
DOI: 10.1175/JCLI-D-15-0117.1
Scopus记录号: 2-s2.0-84971467985
论文题名:
The role of large-scale feedbacks in cumulus convection parameter estimation
作者: Li S.; Zhang S.; Liu Z.; Yang X.; Rosati A.; Golaz J.-C.; Zhao M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期:11
起始页码: 4099
结束页码: 4119
语种: 英语
Scopus关键词: Climate models ; Clouds ; Estimation ; Feedback ; Forecasting ; Kalman filters ; Parameterization ; Cloud parameterizations ; Convective parameterization ; Data assimilation ; Ensembles ; Statistical techniques ; Parameter estimation ; climate modeling ; convective system ; cumulus ; data assimilation ; ensemble forecasting ; Kalman filter ; parameterization
英文摘要: Uncertainty in cumulus convection parameterization is one of the most important causes of model climate drift through interactions between large-scale background and local convection that use empirically set parameters. Without addressing the large-scale feedback, the calibrated parameter values within a convection scheme are usually not optimal for a climate model. This study first designs a multiple-column atmospheric model that includes large-scale feedbacks for cumulus convection and then explores the role of large-scale feedbacks in cumulus convection parameter estimation using an ensemble filter. The performance of convection parameter estimation with or without the presence of large-scale feedback is examined. It is found that including large-scale feedbacks in cumulus convection parameter estimation can significantly improve the estimation quality. This is because large-scale feedbacks help transform local convection uncertainties into global climate sensitivities, and including these feedbacks enhances the statistical representation of the relationship between parameters and state variables. The results of this study provide insights for further understanding of climate drift induced from imperfect cumulus convection parameterization, which may help improve climate modeling. © 2016 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49910
Appears in Collections:气候变化事实与影响

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作者单位: Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China; NOAA/Geophysical Fluid Dynamics Laboratory, University of Wisconsin-Madison Joint Visit Program, Princeton, NJ, United States; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; Center for Climate Research, Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI, United States; University Corporation for Atmospheric Research, Boulder, CO, United States

Recommended Citation:
Li S.,Zhang S.,Liu Z.,et al. The role of large-scale feedbacks in cumulus convection parameter estimation[J]. Journal of Climate,2016-01-01,29(11)
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