{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["630(8018)"],"submitter":["Wynne-Cattanach BL"],"pubmed_abstract":["Small-scale turbulent mixing drives the upwelling of deep water masses in the abyssal ocean as part of the global overturning circulation<sup>1</sup>. However, the processes leading to mixing and the pathways through which this upwelling occurs remain insufficiently understood. Recent observational and theoretical work<sup>2-5</sup> has suggested that deep-water upwelling may occur along the ocean's sloping seafloor; however, evidence has, so far, been indirect. Here we show vigorous near-bottom upwelling across isopycnals at a rate of the order of 100 metres per day, coupled with adiabatic exchange of near-boundary and interior fluid. These observations were made using a dye released close to the seafloor within a sloping submarine canyon, and they provide direct evidence of strong, bottom-focused diapycnal upwelling in the deep ocean. This supports previous suggestions that mixing at topographic features, such as canyons, leads to globally significant upwelling<sup>3,6-8</sup>. The upwelling rates observed were approximately 10,000 times higher than the global average value required for approximately 30 × 10<sup>6</sup> m<sup>3</sup> s<sup>-1</sup> of net upwelling globally<sup>9</sup>."],"journal":["Nature"],"pagination":["884-890"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC11208136"],"repository":["biostudies-literature"],"pubmed_title":["Observations of diapycnal upwelling within a sloping submarine canyon."],"pmcid":["PMC11208136"],"pubmed_authors":["Couto N","Ferrari R","Le Boyer A","Ruan X","Voet G","Spingys CP","Naveira Garabato AC","van Haren H","Wynne-Cattanach BL","Mercier H","Alford MH","Polzin K","Messias MJ","Drake HF"],"additional_accession":[]},"is_claimable":false,"name":"Observations of diapycnal upwelling within a sloping submarine canyon.","description":"Small-scale turbulent mixing drives the upwelling of deep water masses in the abyssal ocean as part of the global overturning circulation<sup>1</sup>. However, the processes leading to mixing and the pathways through which this upwelling occurs remain insufficiently understood. Recent observational and theoretical work<sup>2-5</sup> has suggested that deep-water upwelling may occur along the ocean's sloping seafloor; however, evidence has, so far, been indirect. Here we show vigorous near-bottom upwelling across isopycnals at a rate of the order of 100 metres per day, coupled with adiabatic exchange of near-boundary and interior fluid. These observations were made using a dye released close to the seafloor within a sloping submarine canyon, and they provide direct evidence of strong, bottom-focused diapycnal upwelling in the deep ocean. This supports previous suggestions that mixing at topographic features, such as canyons, leads to globally significant upwelling<sup>3,6-8</sup>. The upwelling rates observed were approximately 10,000 times higher than the global average value required for approximately 30 × 10<sup>6</sup> m<sup>3</sup> s<sup>-1</sup> of net upwelling globally<sup>9</sup>.","dates":{"release":"2024-01-01T00:00:00Z","publication":"2024 Jun","modification":"2025-04-21T20:15:25.724Z","creation":"2025-04-05T17:58:21.385Z"},"accession":"S-EPMC11208136","cross_references":{"pubmed":["38926613"],"doi":["10.1038/s41586-024-07411-2"]}}