Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0369.1 |
Comments on "The Gulf Stream Convergence Zone in the Time-Mean Winds'' | |
Plougonven, Riwal1; Foussard, Alexis; Lapeyre, Guillaume | |
2018-06-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:6页码:2139-2149 |
文章类型 | Editorial Material |
语种 | 英语 |
国家 | France |
英文摘要 | In a recent study, O'Neill et al. analyzed the divergence of surface winds above the northwest Atlantic. In the time mean, a band of convergence is found, overlying the southern flank of the Gulf Stream. To quantify the impact of synoptic storms, the authors proposed to compare the time-mean divergence with the divergence averaged in the absence of rain. In the resulting conditional-average field, divergence was found to be positive nearly everywhere. O'Neill et al. concluded that this absence of convergence precludes the Ekman-balanced mass adjustment to be responsible for the atmospheric response above the Gulf Stream. Using a simplistic toy model as well as a numerical simulation representative of a storm track, we show that the absence of negative divergence values purely results from the correlation between rain and convergence: the conditional average based on the absence of rain necessarily implies a shift toward positive divergence values. In consequence, we argue that conditional statistics (based on the absence of rain or removing extreme values in the divergence field), as produced by O'Neill et al., do not allow conclusions on the mechanisms underlying the atmospheric response to the Gulf Stream. They nevertheless highlight the essential role of synoptic storms in shaping the divergence field in instantaneous fields. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000434942300021 |
WOS关键词 | SEA-SURFACE TEMPERATURE |
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/29695 |
专题 | 地球科学 |
作者单位 | 1.Ecole Polytech, Lab Meteorol Dynam IPSL, Palaiseau, France; 2.CNRS, Paris, France; 3.PSL Res Univ, Ecole Normale Super, Paris, France; 4.Ecole Ponts ParisTech, Champs Sur Marne, France |
推荐引用方式 GB/T 7714 | Plougonven, Riwal,Foussard, Alexis,Lapeyre, Guillaume. Comments on "The Gulf Stream Convergence Zone in the Time-Mean Winds''[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(6):2139-2149. |
APA | Plougonven, Riwal,Foussard, Alexis,&Lapeyre, Guillaume.(2018).Comments on "The Gulf Stream Convergence Zone in the Time-Mean Winds''.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(6),2139-2149. |
MLA | Plougonven, Riwal,et al."Comments on "The Gulf Stream Convergence Zone in the Time-Mean Winds''".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.6(2018):2139-2149. |
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