Evidence of O-2 consumption in underway seawater lines: Implications for air-sea O-2 and CO2 fluxes
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Non |
| Statut de publication | : | Publié |
| Année de publication | : | 2010 |
| Auteurs (5) | : | JURANEK L,w HAMME Roberta,c KAISER Jan WANNINKHOF Rik QUAY Pd |
| Revue scientifique | : | Geophysical Research Letters |
| Volume | : | 37 |
| Fascicule | : | |
| Pages | : | |
| DOI | : | 10.1029/2009GL040423 |
| URL | : | - |
| Abstract | : | We observed O-2 deficits of 0.5 to 2.0% (1 to 4 mu mol/kg) in the underway seawater lines of three different ships. Deficits in O-2/Ar and isotopic enrichments in dissolved O2 observed in underway seawater lines indicate a respiratory removal process. A 1% respiratory bias in underway lines would lead to a 2.5-5 mu atm (2.5-5 mu bar) enhancement in surface water pCO(2). If an underway pCO(2) bias of this magnitude affected all measurements, the global oceanic carbon uptake based on pCO(2) climatologies would be 0.5-0.8 Pg/yr higher than the present estimate of 1.6 Pg/yr. Treatment of underway lines with bleach for several hours and thorough flushing appeared to minimize O-2 loss. Given the increasing interest in underway seawater measurements for the determination of surface CO2 and O-2 fluxes, respiration in underway seawater lines must be identified and eliminated on all observing ships to ensure unbiased data. Citation: Juranek, L. W., R. C. Hamme, J. Kaiser, R. Wanninkhof, and P. D. Quay (2010), Evidence of O-2 consumption in underway seawater lines: Implications for air-sea O-2 and CO2 fluxes, Geophys. Res. Lett., 37, L01601, doi: 10.1029/2009GL040423. |
| Mots-clés | : | BIOFILMS; OXYGEN; PCO(2); WATER |
| Commentaire | : | Times Cited in Web of Science Core Collection: 32 |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Juranek LW, Hamme RC, Kaiser J, Wanninkhof R, Quay P (2010) Evidence of O-2 consumption in underway seawater lines: Implications for air-sea O-2 and CO2 fluxes. Geophys Res Lett 37 | doi: 10.1029/2009GL040423
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