FN Archimer Export Format
PT J
TI Export fluxes in a naturally iron-fertilized area of the Southern Ocean - Part 1: Seasonal dynamics of particulate organic carbon export from a moored sediment trap
BT 
AF REMBAUVILLE, M.
   SALTER, I.
   LEBLOND, N.
   GUENEUGUES, A.
   BLAIN, S.
AS 1:1,2;2:1,2,3;3:4,5;4:1,2;5:1,2;
FF 1:;2:;3:;4:;5:;
C1 Univ Paris 06, Univ Paris 04, Observ Oceanol, UMR7621,LOMIC, Banyuls Sur Mer, France.
   CNRS, Observ Oceanol, UMR7621, LOMIC, Banyuls Sur Mer, France.
   Alfred Wegener Inst Polar & Marine Res, Bremerhaven, Germany.
   Univ Paris 06, Univ Paris 04, Observ Oceanol, LOV,UMR7093, Villefranche Sur Mer, France.
   CNRS INSU, LOV, Observ Oceanol, UMR7093, Villefranche Sur Mer, France.
C2 UNIV PARIS 06, FRANCE
   CNRS, FRANCE
   INST A WEGENER, GERMANY
   UNIV PARIS 06, FRANCE
   UNIV PARIS 06, FRANCE
IN DOAJ
IF 3.7
TC 29
UR https://archimer.ifremer.fr/doc/00295/40578/39496.pdf
   https://archimer.ifremer.fr/doc/00295/40578/71318.pdf
LA English
DT Article
CR MD 145 / KEOPS
   MD 188 / KEOPS 2
BO Marion Dufresne
AB A sediment trap moored in the naturally iron-fertilized Kerguelen Plateau in the Southern Ocean provided an annual record of particulate organic carbon and nitrogen fluxes at 289 m. At the trap deployment depth, current speeds were typically low (similar to 10 cm s(-1)) and primarily tidal-driven (M2 tidal component). Although advection was weak, the sediment trap may have been subject to hydrodynamical and biological (swimmer feeding on trap funnel) biases. Particulate organic carbon (POC) flux was generally low (< 0.5 mmol m(-2) d(-1)), although two episodic export events (< 14 days) of 1.5 mmol m(-2) d(-1) were recorded. These increases in flux occurred with a 1-month time lag from peaks in surface chlorophyll and together accounted for approximately 40% of the annual flux budget. The annual POC flux of 98.2 +/- 4.4 mmolm 2 yr(-1) was low considering the shallow deployment depth but comparable to independent estimates made at similar depths (similar to 300 m) over the plateau, and to deep-ocean (> 2 km) fluxes measured from similarly productive iron-fertilized blooms. Although undertrapping cannot be excluded in shallow moored sediment trap deployment, we hypothesize that grazing pressure, including meso-zooplankton and mesopelagic fishes, may be responsible for the low POC flux beneath the base of the winter mixed layer. The importance of plankton community structure in controlling the temporal variability of export fluxes is addressed in a companion paper.
PY 2015
PD JUL
SO Biogeosciences
SN 1726-4170
PU Copernicus Gesellschaft Mbh
VL 12
IS 11
UT 000356179800002
BP 3153
EP 3170
DI 10.5194/bg-12-3153-2015
ID 40578
ER

EF