FN Archimer Export Format
PT J
TI Distribution and rates of nitrogen fixation in the western tropical South Pacific Ocean constrained by nitrogen isotope budgets
BT 
AF KNAPP, Angela N.
   MCCABE, Kelly M.
   GROSSO, Olivier
   LEBLOND, Nathalie
   MOUTIN, Thierry
   BONNET, Sophie
AS 1:1;2:1;3:2;4:3;5:2;6:4;
FF 1:;2:;3:;4:;5:;6:;
C1 Florida State Univ, Earth Ocean & Atmospher Sci Dept, 117 N Woodward AVE, Tallahassee, FL 32306 USA.
   Aix Marseille Univ, CNRS, Univ Toulon, IRD,OSU Pytheas,MIO,UM 110, F-13288 Marseille, France.
   Observ Oceanol Villefranche, Lab Oceanog Villefranche, UMR 7093, Villefranche Sur Mer, France.
   Aix Marseille Univ, Univ Toulon, CNRS, MIO,UM 110,IRD,OSU Pytheas, Noumea 98848, New Caledonia.
C2 UNIV FLORIDA STATE, USA
   UNIV AIX MARSEILLE, FRANCE
   UNIV PARIS 06, FRANCE
   UNIV AIX MARSEILLE, FRANCE
IN DOAJ
IF 3.951
TC 22
UR https://archimer.ifremer.fr/doc/00420/53117/54069.pdf
   https://archimer.ifremer.fr/doc/00420/53117/56818.pdf
LA English
DT Article
CR OUTPACE
BO L'Atalante
AB Constraining the rates and spatial distribution of di-nitrogen (N2) fixation fluxes to the ocean informs our understanding of the environmental sensitivities of N2 fixation as well as the timescale over which the fluxes of nitrogen (N) to and from the ocean may respond to each other. Here we quantify rates of N2 fixation as well as its contribution to export production along a zonal transect in the Western Tropical South Pacific (WTSP) Ocean using N isotope (δ15N) budgets. Comparing measurements of water column nitrate + nitrite δ15N with the δ15N of sinking particulate N at a western, central, and eastern station, these δ15N budgets indicate high, modest, and low rates of N2 fixation at the respective stations. The results also imply that N2 fixation supports exceptionally high, i.e., > 50 %, of export production at the western and central stations, which are also proximal to the largest iron sources. These geochemically-based rates of N2 fixation are equal to or greater than those previously reported in the tropical North Atlantic, indicating that the WTSP Ocean has the capacity to support globally significant rates of N2 fixation, which may compensate for N removal in the oxygen deficient zones of the eastern tropical Pacific. 
PY 2018
PD MAY
SO Biogeosciences
SN 1726-4170
PU Copernicus Gesellschaft Mbh
VL 15
IS 9
UT 000431435900003
BP 2619
EP 2628
DI 10.5194/bg-15-2619-2018
ID 53117
ER

EF