Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0044.1 |
Sensitivity of Gravity Wave Fluxes to Interannual Variations in Tropical Convection and Zonal Wind | |
Alexander, M. Joan1; Ortland, David A.2; Grimsdell, Alison W.1; Kim, Ji-Eun3,4 | |
2017-09-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Using an idealized model framework with high-frequency tropical latent heating variability derived from global satellite observations of precipitation and clouds, the authors examine the properties and effects of gravity waves in the lower stratosphere, contrasting conditions in an El Nino year and a La Nina year. The model generates a broad spectrum of tropical waves including planetary-scale waves through mesoscale gravity waves. The authors compare modeled monthly mean regional variations in wind and temperature with reanalyses and validate the modeled gravity waves using satellite-and balloon-based estimates of gravity wave momentum flux. Some interesting changes in the gravity spectrum of momentum flux are found in the model, which are discussed in terms of the interannual variations in clouds, precipitation, and large-scale winds. While regional variations in clouds, precipitation, and winds are dramatic, the mean gravity wave zonal momentum fluxes entering the stratosphere differ by only 11%. The modeled intermittency in gravity wave momentum flux is shown to be very realistic compared to observations, and the largest-amplitude waves are related to significant gravity wave drag forces in the lowermost stratosphere. This strong intermittency is generally absent or weak in climate models because of deficiencies in parameterizations of gravity wave intermittency. These results suggest a way forward to improve model representations of the lowermost stratospheric quasi-biennial oscillation winds and teleconnections. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409847100001 |
WOS关键词 | QUASI-BIENNIAL OSCILLATION ; STRATOSPHERIC WATER-VAPOR ; TROPOPAUSE TEMPERATURES ; MOMENTUM FLUX ; PART II ; CIRCULATION MODELS ; GLOBAL CIRCULATION ; PASSIVE MICROWAVE ; EQUATORIAL WAVES ; ATMOSPHERE MODEL |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29258 |
专题 | 地球科学 |
作者单位 | 1.NorthWest Res Associates, CoRA Off, Boulder, CO 80301 USA; 2.NorthWest Res Associates, Seattle Off, Redmond, WA USA; 3.Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA; 4.Univ Washington, Joint Inst Study Atmosphere & Ocean, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Alexander, M. Joan,Ortland, David A.,Grimsdell, Alison W.,et al. Sensitivity of Gravity Wave Fluxes to Interannual Variations in Tropical Convection and Zonal Wind[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(9). |
APA | Alexander, M. Joan,Ortland, David A.,Grimsdell, Alison W.,&Kim, Ji-Eun.(2017).Sensitivity of Gravity Wave Fluxes to Interannual Variations in Tropical Convection and Zonal Wind.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(9). |
MLA | Alexander, M. Joan,et al."Sensitivity of Gravity Wave Fluxes to Interannual Variations in Tropical Convection and Zonal Wind".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.9(2017). |
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