Interannual Variability of the Exchange Flow Through the Strait of Bab-al-Mandeb
文献类型：期刊论文
| 作者 | Hoteit, Ibrahim; Xie, Jieshuo2; Krokos, George; Sofianos, Sarantis3 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
 |
| 出版日期 | 2019 |
| 卷号 | 124期号:3页码:1988 |
| ISSN号 | 2169-9275 |
| 关键词 | Red Sea Bab-al-Mandeb strait interbasin exchanges seasonal patterns interannual variability |
| DOI | 10.1029/2018JC014478 |
| 英文摘要 | The interannual variability of the exchange flow between the Red Sea and the Gulf of Aden through the Bab-al-Mandeb strait is examined based on a high-resolution, nonhydrostatic hindcast model simulation covering a 19-year period (1995-2013), using the MITgcm (MIT general circulation model). The model is validated against moored profiles and along-strait cruise observations collected during the period from June 1995 to November 1996 and 19-year sea surface temperature satellite observations. The model well reproduces the properties of the water masses at the strait over a wide range of spatiotemporal scales, including the typical two- and three-layer seasonal patterns and the related intraseasonal-to-interannual cycles. The seasonality of the exchange flow is predominately determined by the time-varying surface winds, with a higher correlation over the Gulf of Aden, reflecting the importance of local Gulf of Aden processes for the exchanges at the strait. The alternation of the two seasonal patterns is driven by a combination of the buoyancy-driven mean circulation with the wind-induced transport. The onset/offset of the two patterns is estimated to take place one-to-two weeks after the respective monsoon-driven wind reversal. Model results indicate that the onset dates and durations of both patterns exhibit a considerable interannual variability. Additionally, the duration of the summer (winter) exchange pattern presents a significant increasing (decreasing) trend of similar to 1.45day/year (similar to 1.22day/year) over the 19-year period. Significant interannual variabilities and trends are observed in terms of the total volume of water, salt mass, and stored heat of the exchanges. Budget analysis of these trends suggests that the duration of the two exchange patterns is more important in determining the interannual variability and the related trends than the intensity of the exchange, or the variations in mean salinity or temperature of the exchanged water masses. Plain Language Summary The interannual variability of exchange flow through the poorly sampled strait of Bab-al-Mandeb is examined based on a high-resolution, nonhydrostatic hindcast model simulation covering a 19-year period (1995-2013), using the MITgcm model. The simulation successfully reproduces the properties of water masses at the strait over a wide range of spatiotemporal scales, including the typical two- and three-layer seasonal patterns and the related intraseasonal-to-interannual cycles. We show that the seasonality of the exchange flow is predominately determined by the time-varying surface winds, and the alteration of the two seasonal patterns is driven by a combination of the buoyancy-driven mean circulation with the wind-induced transport. The simulation results reveal that the onset dates and durations of both patterns exhibit a considerable interannual variability. The duration of the summer (winter) exchange pattern presents a significant increasing (decreasing) trend of 1.45day/year (1.22day/year) over the 19-year period. Significant interannual variability and trends are also observed with respect to the exchanged total volume of water, salt mass, and stored heat. Based on a budget analysis of these trends, we demonstrate that the duration of the two exchange patterns is more important in determining the interannual variability and the related trends. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17755]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 作者单位 | 1.Univ Athens, Div Environm Phys, Athens, Greece 2.King Abdullah Univ Sci & Technol, Earth Sci & Engn Dept, Thuwal, Saudi Arabia 3.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hoteit, Ibrahim,Xie, Jieshuo,Krokos, George,et al. Interannual Variability of the Exchange Flow Through the Strait of Bab-al-Mandeb[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2019,124(3):1988, 2009. |
| APA | Hoteit, Ibrahim,Xie, Jieshuo,Krokos, George,&Sofianos, Sarantis.(2019).Interannual Variability of the Exchange Flow Through the Strait of Bab-al-Mandeb.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,124(3),1988. |
| MLA | Hoteit, Ibrahim,et al."Interannual Variability of the Exchange Flow Through the Strait of Bab-al-Mandeb".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 124.3(2019):1988. |
入库方式： OAI收割
来源：南海海洋研究所
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