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DOI | 10.1175/JAS-D-16-0149.1 |
The Role of Back Pressure in the Atmospheric Response to Surface Stress Induced by the Kuroshio | |
Takatama, Kohei1; Schneider, Niklas1,2 | |
2017-02-01 | |
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:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The effect of ocean current drag on the atmosphere is of interest as a test case for the role of back pressure, because the response is independent of the thermally induced modulation of the boundary layer stability and hydrostatic pressure. The authors use a regional atmospheric model to investigate the impact of drag induced by the Kuroshio in the East China Sea on the overlying winter atmosphere. Ocean currents dominate the wind stress curl compared to the impacts of sea surface temperature (SST) fronts. Wind stress convergences and divergences are weakly enhanced even though the ocean current is almost geostrophic. These modifications change the linear relationships (coupling coefficients) between the wind stress curl/divergence and the SST Laplacian, crosswind, and downwind gradients. Clear signatures of the ocean current impacts are found beyond the sea surface: sea surface pressure (back pressure) decreases near the current axis, and precipitation increases over the downwind region. However, these responses are very small despite strong Ekman pumping due to the current. A linear reduced gravity model is used to explain the boundary layer dynamics. The linear vorticity equation shows that the oceanic influence on wind stress curl is balanced by horizontal advection decoupling the boundary layer from the interior atmosphere. Spectral transfer functions are used to explain the general response of back pressure to geostrophic ocean currents and sea surface height. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394341100016 |
WOS关键词 | EASTERN EQUATORIAL PACIFIC ; LOW-FREQUENCY VARIABILITY ; OCEANIC THERMAL FRONT ; AIR-SEA INTERACTION ; LOW-LEVEL WINDS ; TROPICAL PACIFIC ; GULF-STREAM ; TEMPERATURE ; SATELLITE ; CURRENTS |
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/29553 |
专题 | 地球科学 |
作者单位 | 1.Univ Hawaii Manoa, Int Pacific Res Ctr, Honolulu, HI 96822 USA; 2.Univ Hawaii Manoa, Dept Oceanog, Honolulu, HI 96822 USA |
推荐引用方式 GB/T 7714 | Takatama, Kohei,Schneider, Niklas. The Role of Back Pressure in the Atmospheric Response to Surface Stress Induced by the Kuroshio[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(2). |
APA | Takatama, Kohei,&Schneider, Niklas.(2017).The Role of Back Pressure in the Atmospheric Response to Surface Stress Induced by the Kuroshio.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(2). |
MLA | Takatama, Kohei,et al."The Role of Back Pressure in the Atmospheric Response to Surface Stress Induced by the Kuroshio".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.2(2017). |
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