Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0096.1 |
On the Relation between Gravity Waves and Wind Speed in the Lower Stratosphere over the Southern Ocean | |
Plougonven, Riwal1; Jewtoukoff, Valerian1; de la Camara, Alvaro2,4; Lott, Francois2; Hertzog, Albert3 | |
2017-04-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | France; USA |
英文摘要 | The relationship between gravity wave momentum fluxes and local wind speed is investigated for oceanic regions at high southern latitudes during austral spring. The motivation is to better describe the gravity wave field by identifying a simple relationship between gravity waves and the large-scale flow. The tools used to describe the gravity waves are probability density functions of the gravity wave momentum fluxes. Three independent datasets covering high latitudes in the Southern Hemisphere springtime are analyzed: simulations with a mesoscale model, analyses from the European Centre for Medium-Range Weather Forecasts, and observations from superpressure balloons of the Concordiasi campaign in 2010. A remarkably robust relation is found, with stronger momentum fluxes much more likely in regions of strong winds. The tails of the probability density functions are well described as lognormal. The median momentum flux increases linearly with background wind speed: for winds stronger than 50 ms-(1), the median gravity wave momentum fluxes are about 4 times larger than for winds weaker than 10 ms(-1). From model output, this relation is found to be relevant from the tropo-pause to the midstratosphere at least. The flux dependence on wind speed shows a somewhat steeper slope at higher altitude. Several different processes contribute to this relation, involving both the distribution of sources and the effects of propagation and filtering. It is argued that the location of tropospheric sources is the main contributor in the upper troposphere and lowermost stratosphere and that lateral propagation into regions of strong winds becomes increasingly important above. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399333700007 |
WOS关键词 | MOMENTUM FLUX ; BALLOON FLIGHTS ; PHASE SPEEDS ; PART I ; CLIMATE ; PARAMETERIZATION ; GENERATION ; DRAG ; CONVECTION ; SPECTRUM |
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/29775 |
专题 | 地球科学 |
作者单位 | 1.Univ Paris Saclay, Ecole Polytech, Lab Meteorol Dynam IPSL, Palaiseau, France; 2.PSL Res Univ, Ecole Normale Super, CNRS, Lab Meteorol Dynam IPSL, Paris, France; 3.Sorbonne Univ, Univ Pierre & Marie Curie, Lab Meteorol Dynam IPSL, Paris, France; 4.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Plougonven, Riwal,Jewtoukoff, Valerian,de la Camara, Alvaro,et al. On the Relation between Gravity Waves and Wind Speed in the Lower Stratosphere over the Southern Ocean[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(4). |
APA | Plougonven, Riwal,Jewtoukoff, Valerian,de la Camara, Alvaro,Lott, Francois,&Hertzog, Albert.(2017).On the Relation between Gravity Waves and Wind Speed in the Lower Stratosphere over the Southern Ocean.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(4). |
MLA | Plougonven, Riwal,et al."On the Relation between Gravity Waves and Wind Speed in the Lower Stratosphere over the Southern Ocean".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.4(2017). |
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