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Título: | Organic carbon budget for the eastern boundary of the North Atlantic subtropical gyre: major role of DOC in mesopelagic respiration |
Autor: | Santana-Falcón, Yeray; Álvarez-Salgado, Xosé Antón CSIC ORCID ; Pérez-Hernández, María Dolores; Hernández Guerra, Alonso; Mason, Evan CSIC ORCID; Arístegui, Javier | Fecha de publicación: | 2017 | Editor: | Nature Publishing Group | Citación: | Scientific Reports 7(1): 10129 (2017) | Resumen: | Transports of suspended particulate (POCsusp) and dissolved (DOC) organic carbon are inferred from a box-model covering the eastern boundary of the North Atlantic subtropical gyre. Corresponding net respiration rates (R) are obtained from a net organic carbon budget that is based on the transport estimates, and includes both vertical and lateral fluxes. The overall R in the mesopelagic layer (100–1500 m) is 1.6 ± 0.4 mmol C m−2 d−1. DOC accounts for up to 53% of R as a result of drawdown of organic carbon within Eastern North Atlantic Central Water (ENACW) that is entrained into sinking Mediterranean Overflow Water (MOW) that leads to formation of Mediterranean water (MW) at intermediate depths (~900 m). DOC represents 90% of the respired non-sinking organic carbon. When converted into oxygen units, the computed net respiration rate represents less than half the oxygen utilization rates (OUR) reported for the mesopelagic waters of the subtropical North Atlantic. Mesoscale processes in the area, not quantified with our approach, could account in part for the OUR differences observed between our carbon budget and other published studies from the North Atlantic, although seasonal or interannual variability could also be responsible for the difference in the estimates | Descripción: | 12 páginas, 5 figuras, 1 tabla..- This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made | Versión del editor: | http://dx.doi.org/10.1038/s41598-017-10974-y | URI: | http://hdl.handle.net/10261/155208 | DOI: | 10.1038/s41598-017-10974-y | E-ISSN: | 2045-2322 |
Aparece en las colecciones: | (IMEDEA) Artículos (IIM) Artículos |
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