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| DOI | 10.1016/j.dynatmoce.2018.10.002 |
| Amazon River plume influence on Western Tropical Atlantic dynamic variability | |
| Varona H.L.; Veleda D.; Silva M.; Cintra M.; Araujo M. | |
| 发表日期 | 2019 |
| ISSN | 03770265 |
| 起始页码 | 1 |
| 结束页码 | 15 |
| 卷号 | 85 |
| 英文摘要 | This study focuses on analysing the potential impact of the Amazon and Pará Rivers on the salinity, temperature and hydrodynamics of the Western Tropical North Atlantic (WTNA) region between 60.5°–24 °W and 5 °S–16 °N. The Regional Ocean Model System (ROMS) was used to simulate ocean circulation with 0.25° horizontal resolution and 32 vertical levels. Two numerical experiments were performed considering river discharge and river input. Temperature and salinity distributions obtained numerically were compared with Simple Ocean Data Assimilation (SODA) and in situ observations from the Prediction Research Moored Array in the Tropical Atlantic (PIRATA) buoys located at 38 °W8 °N and 38 °W12 °N. Surface currents were compared with Surface Currents from Diagnostic model (SCUD). Once we verified that model results agreed with observations, scenarios with and without river discharges were compared. The difference between both simulations in the Sea Surface Temperature distribution was smaller than 2 °C, whereas the Sea Surface Salinity (SSS) changed by approximately 8 psu in the plume area close to the coast from August to December and reaching SSS differences of approximately 4 psu in the region of the North Equatorial Counter Current (NECC). The surface current velocities are stronger in the experiment with river discharge, mainly in the NECC area from September to December and close to the coast in June to August. The results show that river discharges also cause a phase shift in the zonal currents, anticipating the retroflection of the North Brazil Current by two months and enhancing eastward NECC transport, which is in agreement with observations. The Mixed Layer Depth and Isothermal Layer Depth in the presence of river discharge is 20–50 m shallower over the entire extension of the Amazon plume compared with the situation without continental inflows. As a consequence, stronger Barrier Layers develop in the river plumes, reducing the Oceanic Heat Content in the WTNA. © 2018 Elsevier B.V. |
| 英文关键词 | Amazon River discharge; Barrier layer; Mixed layer; Ocean circulation; Oceanic heat content; ROMS; Western Tropical North Atlantic |
| 语种 | 英语 |
| scopus关键词 | Enthalpy; Oceanography; ROM; Tropics; Amazon river; Barrier layers; Mixed layer; North Atlantic; Ocean circulation; Oceanic heat contents; Rivers; computer simulation; data assimilation; mixed layer; observational method; oceanic circulation; river discharge; river plume; Amazon River; Atlantic Ocean; Atlantic Ocean (Tropical); Brazil |
| 来源期刊 | Dynamics of Atmospheres and Oceans
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/178529 |
| 作者单位 | Department of Oceanography, DOCEAN, Federal University of Pernambuco, Recife, PE, Brazil; Federal University of Rio Grande do Norte, Natal, RN, Brazil; Brazilian Research Network on Global Climate Change, Rede CLIMA, S. José dos Campos, SP, Brazil |
| 推荐引用方式 GB/T 7714 | Varona H.L.,Veleda D.,Silva M.,et al. Amazon River plume influence on Western Tropical Atlantic dynamic variability[J],2019,85. |
| APA | Varona H.L.,Veleda D.,Silva M.,Cintra M.,&Araujo M..(2019).Amazon River plume influence on Western Tropical Atlantic dynamic variability.Dynamics of Atmospheres and Oceans,85. |
| MLA | Varona H.L.,et al."Amazon River plume influence on Western Tropical Atlantic dynamic variability".Dynamics of Atmospheres and Oceans 85(2019). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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