Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/53500
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Organic matter distributions in the Eastern North Atlantic - Azores Front Region |
Autor: | Doval, M. Dolores CSIC ORCID; Álvarez-Salgado, Xosé Antón CSIC ORCID ; Pérez, Fiz F. CSIC ORCID | Palabras clave: | Dissolved organic carbon and nitrogen Suspended organic carbon and nitrogen Azores Front Eastern North Atlantic |
Fecha de publicación: | 2001 | Editor: | Elsevier | Citación: | Journal of Marine Systems 30(1-2): 33-49 (2001) | Resumen: | Temperate, transitional and subtropical waters of the remote Azores Front region east of Azores (24–40ºN, 22–32ºW) were sampled during three cruises conducted under increasing stratification conditions (April 1999, May 1997 and August 1998). Despite the temporal increase of surface temperature (by 5 ºC) and stratification (by 2.1 min-2), as well as the thermocline shoaling (by ~15 m), dissolved organic carbon (DOC) and nitrogen (DON) in the surface layer were not significantly different for the early spring, late spring and summer periods, with average concentrations of 69±2 µM-C and 5.2±0.4 µM-N, respectively. The surface excess of semi-labile DOC, compared with the baseline DOC concentration in the deep ocean (47±2 µM-C), represents 33% of the bulk DOC concentration and as much as 85% of the TOC (=POC+DOC)excess. When compared with the winter baseline (56±2 µM-C., the seasonal surface DOC excess is 20% of the bulk DOC concentration and 87% of the seasonal TOC excess. These results confirm the major role played by DOC in the carbon cycle of surface waters of the Azores Front region. The total amount of bioreactive DOC transported from the temperate to the subtropical North Atlantic by the Ekman flux between March and December represents only ~15% of the average annual primary production, and ~15% and ~30% of the measured sinking POC fluxqvertical DOC eddy diffusion during early spring and summer, respectively. Vertical eddy diffusion is 35% and 2% of the spring and summer sinking POC flux, respectively. On the other hand, DOC only contributes 13% to the local oxidation of organic matter in subsurface waters (between the pycnocline and 500 m) of the study region. | Descripción: | 17 páginas, 6 figuras, 2 tablas | Versión del editor: | http://dx.doi.org/10.1016/S0924-7963(01)00036-7 | URI: | http://hdl.handle.net/10261/53500 | DOI: | 10.1016/S0924-7963(01)00036-7 | ISSN: | 0924-7963 |
Aparece en las colecciones: | (IIM) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Organic_matter_distributions.pdf | 576,25 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
28
checked on 18-abr-2024
WEB OF SCIENCETM
Citations
29
checked on 27-feb-2024
Page view(s)
330
checked on 19-abr-2024
Download(s)
330
checked on 19-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.