Parametrization of area cloud fraction

被引：24

作者：

Boutle, I. A. ^{[1
]}

Morcrette, C. J. ^{[1
]}

机构：

[1] Met Off, Exeter EX1 3PB, Devon, England

来源：

ATMOSPHERIC SCIENCE LETTERS | 2010年 / 11卷 / 04期

关键词：

stratocumulus; PC2; unified model; prognostic cloud; LARGE-SCALE MODELS; PARAMETERIZATION; SCHEME; VARIABILITY; RADAR;

D O I：

10.1002/asl.293

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Comparisons of radiosonde data to model profiles show that the relative coarseness of the vertical grid can lead to poorly resolved changes in thermodynamic properties. This can lead to the model underestimating cloud cover. A parametrization for area cloud fraction, compatible with a prognostic cloud scheme, is developed and tested. The parametrization is then implemented in a general circulation model and used to produce a weather forecast and a climate simulation. The simulated cloud cover is improved in both models, whilst feedbacks within the climate model lead to an improvement in the surface temperature, particularly in the Northern-Hemisphere winter. (C) Crown Copyright 2010. Published with the permission of the Controller of HMSO and the Queen's Printer for Scotland

引用

页码：283 / 289

页数：7

共 25 条

[1]

[Anonymous], 2008, Evaluation of the HadGEM2 Model

[2] Marine boundary layer clouds at the heart of tropical cloud feedback uncertainties in climate models [J].

Bony, S ;

Dufresne, JL .

GEOPHYSICAL RESEARCH LETTERS, 2005, 32 (20) :1-4

[3] Parameterizing the difference in cloud fraction defined by area and by volume as observed with radar and lidar [J].

Brooks, ME ;

Hogan, RJ ;

Illingworth, AJ .

JOURNAL OF THE ATMOSPHERIC SCIENCES, 2005, 62 (07) :2248-2260

[4]

DelGenio AD, 1996, J CLIMATE, V9, P270, DOI 10.1175/1520-0442(1996)009<0270:APCWPF>2.0.CO

[5]

[6] Studies with a flexible new radiation code .1. Choosing a configuration for a large-scale model [J].

Edwards, JM ;

Slingo, A .

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 1996, 122 (531) :689-719

[7]

Grenier H, 2001, MON WEATHER REV, V129, P357, DOI 10.1175/1520-0493(2001)129<0357:AMPPFL>2.0.CO

[8]

[9]

Hogan RJ, 2001, J APPL METEOROL, V40, P513, DOI 10.1175/1520-0450(2001)040<0513:COEWSC>2.0.CO

[10]

← 1 2 3 →