New primary production and nitrification in the western subtropical North Atlantic: A modeling study - Université de Bretagne Occidentale Access content directly
Journal Articles Global Biogeochemical Cycles Year : 2006

New primary production and nitrification in the western subtropical North Atlantic: A modeling study

Abstract

The original definition of new primary production rests on the assumption that nitrogenous substrate taken up to fuel algal growth is coming into contact with phytoplankton for the first time that year. Therefore, should the generation of nitrate from ammonium by nitrification turn out to be significant in surface waters then nitrate uptake can no longer be simply ascribed to new production. A modeling study is presented centered on the Bermuda Atlantic Time-series Station, in the oligotrophic subtropical North Atlantic. We quantify the role of nitrification in providing nitrate to fuel primary production through a full annual cycle for the first time. The results confirm previous limited observations suggesting that a major fraction of nitrate uptake in oligotrophic regions ( where nitrification will be most influential), previously ascribed to new production, may actually involve "recycled'' nitrate.
Fichier principal
Vignette du fichier
2005GB002608.pdf (671.99 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-00472060 , version 1 (02-06-2021)

Licence

Copyright

Identifiers

Cite

Adrian Martin, Philippe Pondaven. New primary production and nitrification in the western subtropical North Atlantic: A modeling study. Global Biogeochemical Cycles, 2006, 20 (4), pp.GB4014. ⟨10.1029/2005GB002608⟩. ⟨hal-00472060⟩
78 View
47 Download

Altmetric

Share

Gmail Facebook X LinkedIn More