Contribution of upwelling filaments to offshore carbon export in the subtropical Northeast Atlantic Ocean

X. A. Álvarez-Salgado, J. Arístegui, E. D. Barton, Dennis A Hansell

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Revisiting previously published data we show that upwelling filaments off Iberia and NW Africa export to the offshore system, largely as dissolved organic matter (DOM), from 35% to 58% of the net community production generated in the coastal upwelling systems. Transport by filaments accounts for 2.5 to 4.5 times the offshore carbon export driven by Ekman transport. The fate of this carbon is unknown, although conservative mass balance analysis in the subtropical Northeast Atlantic region suggests that <16% of the exported carbon may be respired in the coastal transition zone (CTZ). Thus, DOM exported by the filaments cannot fully account for the previously reported metabolic imbalance (i.e., net heterotrophy) of the surface waters of the CTZ. The remainder of exported organic matter is transported to and accumulated in the subtropical gyre, where high surface DOM concentrations have been reported. Since filaments are ubiquitous features in all coastal transition zone systems, they must represent a significant flux of carbon to the open ocean, which should be considered in global biogeochemical models.

Original languageEnglish (US)
Pages (from-to)1287-1292
Number of pages6
JournalLimnology and Oceanography
Volume52
Issue number3
StatePublished - May 2007

Fingerprint

Atlantic Ocean
upwelling
dissolved organic matter
transition zone
coastal zone
carbon
ocean
heterotrophy
Ekman transport
gyre
open ocean
Iberian Peninsula
mass balance
surface water
oceans
organic matter

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science

Cite this

Contribution of upwelling filaments to offshore carbon export in the subtropical Northeast Atlantic Ocean. / Álvarez-Salgado, X. A.; Arístegui, J.; Barton, E. D.; Hansell, Dennis A.

In: Limnology and Oceanography, Vol. 52, No. 3, 05.2007, p. 1287-1292.

Research output: Contribution to journalArticle

Álvarez-Salgado, X. A. ; Arístegui, J. ; Barton, E. D. ; Hansell, Dennis A. / Contribution of upwelling filaments to offshore carbon export in the subtropical Northeast Atlantic Ocean. In: Limnology and Oceanography. 2007 ; Vol. 52, No. 3. pp. 1287-1292.
@article{fc770691e0174b29abf41d010fd7a278,
title = "Contribution of upwelling filaments to offshore carbon export in the subtropical Northeast Atlantic Ocean",
abstract = "Revisiting previously published data we show that upwelling filaments off Iberia and NW Africa export to the offshore system, largely as dissolved organic matter (DOM), from 35{\%} to 58{\%} of the net community production generated in the coastal upwelling systems. Transport by filaments accounts for 2.5 to 4.5 times the offshore carbon export driven by Ekman transport. The fate of this carbon is unknown, although conservative mass balance analysis in the subtropical Northeast Atlantic region suggests that <16{\%} of the exported carbon may be respired in the coastal transition zone (CTZ). Thus, DOM exported by the filaments cannot fully account for the previously reported metabolic imbalance (i.e., net heterotrophy) of the surface waters of the CTZ. The remainder of exported organic matter is transported to and accumulated in the subtropical gyre, where high surface DOM concentrations have been reported. Since filaments are ubiquitous features in all coastal transition zone systems, they must represent a significant flux of carbon to the open ocean, which should be considered in global biogeochemical models.",
author = "{\'A}lvarez-Salgado, {X. A.} and J. Ar{\'i}stegui and Barton, {E. D.} and Hansell, {Dennis A}",
year = "2007",
month = "5",
language = "English (US)",
volume = "52",
pages = "1287--1292",
journal = "Limnology and Oceanography",
issn = "0024-3590",
publisher = "American Society of Limnology and Oceanography Inc.",
number = "3",

}

TY - JOUR

T1 - Contribution of upwelling filaments to offshore carbon export in the subtropical Northeast Atlantic Ocean

AU - Álvarez-Salgado, X. A.

AU - Arístegui, J.

AU - Barton, E. D.

AU - Hansell, Dennis A

PY - 2007/5

Y1 - 2007/5

N2 - Revisiting previously published data we show that upwelling filaments off Iberia and NW Africa export to the offshore system, largely as dissolved organic matter (DOM), from 35% to 58% of the net community production generated in the coastal upwelling systems. Transport by filaments accounts for 2.5 to 4.5 times the offshore carbon export driven by Ekman transport. The fate of this carbon is unknown, although conservative mass balance analysis in the subtropical Northeast Atlantic region suggests that <16% of the exported carbon may be respired in the coastal transition zone (CTZ). Thus, DOM exported by the filaments cannot fully account for the previously reported metabolic imbalance (i.e., net heterotrophy) of the surface waters of the CTZ. The remainder of exported organic matter is transported to and accumulated in the subtropical gyre, where high surface DOM concentrations have been reported. Since filaments are ubiquitous features in all coastal transition zone systems, they must represent a significant flux of carbon to the open ocean, which should be considered in global biogeochemical models.

AB - Revisiting previously published data we show that upwelling filaments off Iberia and NW Africa export to the offshore system, largely as dissolved organic matter (DOM), from 35% to 58% of the net community production generated in the coastal upwelling systems. Transport by filaments accounts for 2.5 to 4.5 times the offshore carbon export driven by Ekman transport. The fate of this carbon is unknown, although conservative mass balance analysis in the subtropical Northeast Atlantic region suggests that <16% of the exported carbon may be respired in the coastal transition zone (CTZ). Thus, DOM exported by the filaments cannot fully account for the previously reported metabolic imbalance (i.e., net heterotrophy) of the surface waters of the CTZ. The remainder of exported organic matter is transported to and accumulated in the subtropical gyre, where high surface DOM concentrations have been reported. Since filaments are ubiquitous features in all coastal transition zone systems, they must represent a significant flux of carbon to the open ocean, which should be considered in global biogeochemical models.

UR - http://www.scopus.com/inward/record.url?scp=34249742121&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34249742121&partnerID=8YFLogxK

M3 - Article

VL - 52

SP - 1287

EP - 1292

JO - Limnology and Oceanography

JF - Limnology and Oceanography

SN - 0024-3590

IS - 3

ER -