The PreVOCA experiment: modeling the lower troposphere in the Southeast Pacific

被引：83

作者：

Wyant, M. C. ^{[1
]}

Wood, R. ^{[1
]}

Bretherton, C. S. ^{[1
]}

Mechoso, C. R. ^{[2
]}

Bacmeister, J. ^{[3
]}

Balmaseda, M. A. ^{[4
]}

Barrett, B. ^{[5
]}

Codron, F. ^{[6
]}

Earnshaw, P. ^{[7
]}

Fast, J. ^{[8
]}

Hannay, C. ^{[9
]}

Kaiser, J. W. ^{[4
]}

Kitagawa, H. ^{[10
]}

Klein, S. A. ^{[11
]}

Koehler, M. ^{[4
]}

Manganello, J. ^{[12
]}

Pan, H. -L. ^{[13
]}

Sun, F.

Wang, S. ^{[2
,14
]}

Wang, Y. ^{[15
]}

机构：

[1] Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA

[2] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA

[3] NASA, Global Modeling & Assimiliat Off, Goddard Space Flight Ctr, Greenbelt, MD USA

[4] European Ctr Medium Range Weather Forecasts, Dept Res, Reading RG2 9AX, Berks, England

[5] Univ Chile, Dept Geophys, Santiago, Chile

[6] Univ Paris 06, Meteorol Dynam Lab, Paris, France

[7] Met Off, Exeter, Devon, England

[8] Pacific NW Natl Lab, Richland, WA 99352 USA

[9] Natl Ctr Atmospher Res, Climate & Global Dynam Div, Boulder, CO 80307 USA

[10] Japan Meteorol Agcy, Meteorol Coll, Tokyo, Japan

[11] Lawrence Livermore Natl Lab, Program Climate Model Diag & Intercomparison, Livermore, CA USA

[12] Ctr Ocean Land Atmosphere Studies, Calverton, MD USA

[13] Natl Ctr Environm Predict, Environm Modeling Ctr, Camp Springs, MD USA

[14] USN, Marine Meteorol Div, Res Lab, Monterey, CA USA

[15] Univ Hawaii Manoa, Int Pacific Res Ctr, Sch Ocean & Earth Sci & Technol, Honolulu, HI 96822 USA

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2010年 / 10卷 / 10期

基金：

美国国家科学基金会;

关键词：

GENERAL-CIRCULATION MODELS; LAYER MIXING SCHEME; LIQUID WATER PATH; PART I; BULK PARAMETERIZATION; OROGRAPHIC INFLUENCES; VERTICAL DIFFUSION; DIURNAL CYCLE; LOW-CLOUD; CLIMATE;

D O I：

10.5194/acp-10-4757-2010

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The Preliminary VOCALS Model Assessment (PreVOCA) aims to assess contemporary atmospheric modeling of the subtropical South East Pacific, with a particular focus on the clouds and the marine boundary layer (MBL). Models results from fourteen modeling centers were collected including operational forecast models, regional models, and global climate models for the month of October 2006. Forecast models and global climate models produced daily forecasts, while most regional models were run continuously during the study period, initialized and forced at the boundaries with global model analyses. Results are compared in the region from 40 degrees S to the equator and from 110 degrees W to 70 degrees W, corresponding to the Pacific coast of South America. Mean-monthly model surface winds agree well with QuikSCAT observed winds and models agree fairly well on mean weak large-scale subsidence in the region next to the coast. However they have greatly differing geographic patterns of mean cloud fraction with only a few models agreeing well with MODIS observations. Most models also underestimate the MBL depth by several hundred meters in the eastern part of the study region. The diurnal cycle of liquid water path is underestimated by most models at the 85 degrees W 20 degrees S stratus buoy site compared with satellite, consistent with previous modeling studies. The low cloud fraction is also underestimated during all parts of the diurnal cycle compared to surface-based climatologies. Most models qualitatively capture the MBL deepening around 15 October 2006 at the stratus buoy, associated with colder air at 700 hPa.

引用

页码：4757 / 4774

页数：18

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