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| DOI | 10.1038/s41561-022-00916-3 |
| Intense upper ocean mixing due to large aggregations of spawning fish | |
| Fernández Castro B.; Peña M.; Nogueira E.; Gilcoto M.; Broullón E.; Comesaña A.; Bouffard D.; Naveira Garabato A.C.; Mouriño-Carballido B. | |
| 发表日期 | 2022 |
| ISSN | 1752-0894 |
| 起始页码 | 287 |
| 结束页码 | 292 |
| 卷号 | 15期号:4 |
| 英文摘要 | Small-scale turbulent mixing plays a pivotal role in shaping ocean circulation and a broad range of physical and biogeochemical processes. Despite advances in our understanding of the geophysical processes responsible for this mixing, the nature and importance of biomixing—turbulent mixing caused by marine biota—are still debated. A major source of uncertainty pertains to the efficiency of biomixing (the fraction of the turbulent energy produced through swimming that is spent in mixing the ocean vertically), which the few in situ observations available suggest to be much lower than that of geophysical turbulence. Here we shed light on this problem by analysing 14 days of continuous measurements of centimetre-scale turbulence in an area of coastal upwelling. We show that turbulent dissipation is elevated 10- to 100-fold (reaching 10−6–10−5 W kg−1) every night of the survey due to the swimming activity of large aggregations of anchovies that gather regularly over the spawning season. Turbulent mixing is invigorated concurrently with dissipation, and occurs with an efficiency comparable to that of geophysical turbulence. Our results demonstrate that biologically driven turbulence can be a highly effective mixing agent, and call for a re-examination of its impacts on productive upper ocean regions. © 2022, The Author(s), under exclusive licence to Springer Nature Limited. |
| 语种 | 英语 |
| scopus关键词 | fish; oceanic circulation; spawning population; turbulent mixing; upper ocean |
| 来源期刊 | Nature Geoscience
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/262218 |
| 作者单位 | Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton, United Kingdom |
| 推荐引用方式 GB/T 7714 | Fernández Castro B.； Peña M.； Nogueira E.； Gilcoto M.； Broullón E.； Comesaña A.； Bouffard D.； Naveira Garabato A.C.； Mouriño-Carballido B.. Intense upper ocean mixing due to large aggregations of spawning fish[J],2022,15(4). |
| APA | Fernández Castro B.； Peña M.； Nogueira E.； Gilcoto M.； Broullón E.； Comesaña A.； Bouffard D.； Naveira Garabato A.C.； Mouriño-Carballido B..(2022).Intense upper ocean mixing due to large aggregations of spawning fish.Nature Geoscience,15(4). |
| MLA | Fernández Castro B.； Peña M.； Nogueira E.； Gilcoto M.； Broullón E.； Comesaña A.； Bouffard D.； Naveira Garabato A.C.； Mouriño-Carballido B.."Intense upper ocean mixing due to large aggregations of spawning fish".Nature Geoscience 15.4(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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