Regional differences in modelled net production and shallow remineralization in the North Atlantic subtropical gyre

B. Fernández-Castro, L. Anderson, E. Marañón, Susanne Neuer, B. Ausín, M. Gonzáez-Dávila, J. M. Santana-Casiano, A. Cianca, R. Santana, O. Llinás, M. J. Rueda, B. Mouriño-Carballido

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We used 5-yr concomitant data of tracer distribution from the BATS (Bermuda Time-series Study) and ESTOC (European Station for Time-Series in the Ocean, Canary Islands) sites to build a 1-D tracer model conservation including horizontal advection, and then compute net production and shallow remineralization rates for both sites. Our main goal was to verify if differences in these rates are consistent with the lower export rates of particulate organic carbon observed at ESTOC. Net production rates computed below the mixed layer to 110 m from April to December for oxygen, dissolved inorganic carbon and nitrate at BATS (1.34±0.79 mol O2 mg -2, -1.73±0.52 mol C m-2 and -125±36 mmol N m-2) were slightly higher for oxygen and carbon compared to ESTOC (1.03±0.62 mol O2 m-2, -1.42±0.30 mol C m-2 and -213±56 mmol N m-2), although the differences were not statistically significant. Shallow remineralization rates between 110 and 250 m computed at ESTOC (-3.9plusmn;1.0 mol O2 m -2, 1.53±0.43 mol C m-2 and 38±155 mmol N m-2) were statistically higher for oxygen compared to BATS (-1.81±0.37 mol O2 m-2, 1.52±0.30 mol C m-2 and 147±43 mmol N m-2). The lateral advective flux divergence of tracers, which was more significant at ESTOC, was responsible for the differences in estimated oxygen remineralization rates between both stations. According to these results, the differences in net production and shallow remineralization cannot fully explain the differences in the flux of sinking organic matter observed between both stations, suggesting an additional consumption of non-sinking organic matter at ESTOC.

Original languageEnglish (US)
Pages (from-to)2831-2846
Number of pages16
JournalBiogeosciences
Volume9
Issue number8
DOIs
StatePublished - 2012

Fingerprint

remineralization
gyre
time series analysis
Canary Islands
time series
oceans
Bermuda
ocean
tracer techniques
oxygen
tracer
organic matter
station
carbon
dissolved inorganic carbon
particulate organic carbon
dissolved oxygen
mixed layer
rate
advection

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Ecology, Evolution, Behavior and Systematics

Cite this

Fernández-Castro, B., Anderson, L., Marañón, E., Neuer, S., Ausín, B., Gonzáez-Dávila, M., ... Mouriño-Carballido, B. (2012). Regional differences in modelled net production and shallow remineralization in the North Atlantic subtropical gyre. Biogeosciences, 9(8), 2831-2846. https://doi.org/10.5194/bg-9-2831-2012

Regional differences in modelled net production and shallow remineralization in the North Atlantic subtropical gyre. / Fernández-Castro, B.; Anderson, L.; Marañón, E.; Neuer, Susanne; Ausín, B.; Gonzáez-Dávila, M.; Santana-Casiano, J. M.; Cianca, A.; Santana, R.; Llinás, O.; Rueda, M. J.; Mouriño-Carballido, B.

In: Biogeosciences, Vol. 9, No. 8, 2012, p. 2831-2846.

Research output: Contribution to journalArticle

Fernández-Castro, B, Anderson, L, Marañón, E, Neuer, S, Ausín, B, Gonzáez-Dávila, M, Santana-Casiano, JM, Cianca, A, Santana, R, Llinás, O, Rueda, MJ & Mouriño-Carballido, B 2012, 'Regional differences in modelled net production and shallow remineralization in the North Atlantic subtropical gyre', Biogeosciences, vol. 9, no. 8, pp. 2831-2846. https://doi.org/10.5194/bg-9-2831-2012
Fernández-Castro, B. ; Anderson, L. ; Marañón, E. ; Neuer, Susanne ; Ausín, B. ; Gonzáez-Dávila, M. ; Santana-Casiano, J. M. ; Cianca, A. ; Santana, R. ; Llinás, O. ; Rueda, M. J. ; Mouriño-Carballido, B. / Regional differences in modelled net production and shallow remineralization in the North Atlantic subtropical gyre. In: Biogeosciences. 2012 ; Vol. 9, No. 8. pp. 2831-2846.
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