globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015MS000503
Scopus记录号: 2-s2.0-84959545996
论文题名:
Attributing the behavior of low-level clouds in large-scale models to subgrid-scale parameterizations
作者: Neggers R; A; J
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期:4
起始页码: 2029
结束页码: 2043
语种: 英语
英文关键词: Boundary layers ; Climate change ; Large eddy simulation ; Parameterization ; Turbulent flow ; Attribution ; Cloud-top entrainment instabilities ; General circulation model ; Large-scale models ; Low-level clouds ; Parameterization schemes ; Single-column model ; Weather and climate models ; Climate models ; boundary layer ; climate change ; climate modeling ; cloud ; cloud cover ; comparative study ; general circulation model ; parameterization ; physics ; subtropical region ; Pacific Ocean ; Pacific Ocean (East)
英文摘要: This study explores ways of establishing the characteristic behavior of boundary layer schemes in representing subtropical marine low-level clouds in climate models. To this purpose, parameterization schemes are studied in both isolated and interactive mode with the larger-scale circulation. Results of the EUCLIPSE/GASS intercomparison study for Single-Column Models (SCM) on low-level cloud transitions are compared to General Circulation Model (GCM) results from the CFMIP-2 project at selected grid points in the subtropical eastern Pacific. Low cloud characteristics are plotted as a function of key state variables for which Large-Eddy Simulation results suggest a distinct and reasonably tight relation. These include the Cloud Top Entrainment Instability (CTEI) parameter and the total cloud cover. SCM and GCM results are thus compared and their resemblance is quantified using simple metrics. Good agreement is reported, to such a degree that SCM results are found to be uniquely representative of their GCM, and vice versa. This suggests that the system of parameterized fast boundary layer physics dominates the model state at any given time, even when interactive with the larger-scale flow. This behavior can loosely be interpreted as a unique "fingerprint" of a boundary layer scheme, recognizable in both SCM and GCM simulations. The result justifies and advocates the use of SCM simulation for improving weather and climate models, including the attribution of typical responses of low clouds to climate change in a GCM to specific parameterizations. © 2015. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75966
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Institute for Geophysics and Meteorology, University of Cologne, Cologne, Germany; Royal Netherlands Meteorological Institute, De Bilt, Netherlands

Recommended Citation:
Neggers R,A,J. Attributing the behavior of low-level clouds in large-scale models to subgrid-scale parameterizations[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(4)
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