globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2014MS000382
Scopus记录号: 2-s2.0-85027958808
论文题名:
Improving a global model from the boundary layer: Total turbulent energy and the neutral limit Prandtl number
作者: Pithan F; , Angevine W; , Mauritsen T
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期:2
起始页码: 791
结束页码: 805
语种: 英语
英文关键词: Balloons ; Boundary layer flow ; Boundary layers ; Climate models ; Drag ; Prandtl number ; Turbulence ; Dry convective boundary layer ; Large-scale flows ; Low latitude boundary layer ; Model intercomparisons ; Stable boundary layer ; Turbulent energies ; Turbulent Prandtl number ; Weather and climate models ; Atmospheric thermodynamics ; boundary layer ; climate modeling ; dimensionless number ; drag ; Earth rotation ; entrainment ; orographic effect ; parameterization ; pressure gradient ; Southern Hemisphere ; stratocumulus ; turbulent flow ; zonal wind ; Southern Ocean
英文摘要: Model intercomparisons have identified important deficits in the representation of the stable boundary layer by turbulence parametrizations used in current weather and climate models. However, detrimental impacts of more realistic schemes on the large-scale flow have hindered progress in this area. Here we implement a total turbulent energy scheme into the climate model ECHAM6. The total turbulent energy scheme considers the effects of Earth's rotation and static stability on the turbulence length scale. In contrast to the previously used turbulence scheme, the TTE scheme also implicitly represents entrainment flux in a dry convective boundary layer. Reducing the previously exaggerated surface drag in stable boundary layers indeed causes an increase in southern hemispheric zonal winds and large-scale pressure gradients beyond observed values. These biases can be largely removed by increasing the parametrized orographic drag. Reducing the neutral limit turbulent Prandtl number warms and moistens low-latitude boundary layers and acts to reduce longstanding radiation biases in the stratocumulus regions, the Southern Ocean and the equatorial cold tongue that are common to many climate models. Key Points: A TTE closure improves the representation of turbulence in a GCM Reducing the turbulent Prandtl number affects modeled climate © 2015. The Authors.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76047
Appears in Collections:影响、适应和脆弱性
气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Max Planck Institute for Meteorology, Hamburg, Germany; International Max Planck Research School for Earth System Sciences, Hamburg, Germany; Department of Meteorology, University of Reading, Reading, United Kingdom; NOAA ESRL, Boulder, Colorado, United States

Recommended Citation:
Pithan F,, Angevine W,, Mauritsen T. Improving a global model from the boundary layer: Total turbulent energy and the neutral limit Prandtl number[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(2)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Pithan F]'s Articles
[, Angevine W]'s Articles
[, Mauritsen T]'s Articles
百度学术
Similar articles in Baidu Scholar
[Pithan F]'s Articles
[, Angevine W]'s Articles
[, Mauritsen T]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Pithan F]‘s Articles
[, Angevine W]‘s Articles
[, Mauritsen T]‘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.