FN Archimer Export Format
PT J
TI The impact of Saharan dust on the particulate export in the water column of the North Western Mediterranean Sea
BT 
AF TERNON, E.
   GUIEU, C.
   LOYE-PILOT, M. -D.
   LEBLOND, N.
   BOSC, E.
   GASSER, B.
   MIQUEL, J. -C.
   MARTIN, J.
AS 1:1,2;2:1,2;3:3;4:1;5:4;6:4;7:4;8:4;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 INSU CNRS, UMR 7093, Lab Oceanog Villefranche, F-06230 Villefranche Sur Mer, France.
   Univ Paris 06, UMR 7093, Lab Oceanog Villefranche, F-06230 Villefranche Sur Mer, France.
   Ecole Normale Super, CERES ERTI, F-75231 Paris, France.
   IAEA Marine Environm Labs, Monaco, Monaco.
C2 CNRS, FRANCE
   UNIV PARIS 06, FRANCE
   ENS, FRANCE
   IAEA, MONACO
IN DOAJ
IF 3.587
TC 100
UR https://archimer.ifremer.fr/doc/00309/42028/41326.pdf
LA English
DT Article
CR BOUSSOLE
   DYFAMED
   DYFAMED 2003
   DYFAMED 2004
   DYFAMED 2005
   DYFAMED 2006
   DYFAMED 2007
   DYNAPROC
BO Unknown
   Téthys II
   Le Suroît
AB Simultaneous measurements of atmospheric deposition and of sinking particles at 200 and 1000 m depth, were performed in the Ligurian Sea (North-Western Mediterranean) between 2003 and 2007, along with phytoplanktonic activity derived from satellite images. Atmospheric deposition of Saharan dust particles was very irregular and confirmed the importance of sporadic high magnitude events over the annual average (11.4 g m(-2) yr(-1) for the 4 years). The average marine total mass flux was 31 g m(-2) yr(-1), the larger fraction being the lithogenic one (similar to 37%). The marine total mass flux displayed a seasonal pattern with a maximum in winter, occurring before the onset of the spring bloom. The highest POC fluxes did not occur during the spring bloom nor could they be directly related to any noticeable increase in the surface phytoplanktonic biomass. Over the 4 years of the study, the strongest POC fluxes were concomitant with large increases of the lithogenic marine flux, which had originated from either recent Saharan fallout events (February 2004 and August 2005), from 'old' Saharan dust 'stored' in the upper water column layer (March 2003 and February 2005), or alternatively from lithogenic material originating from Ligurian riverine flooding (December 2003, Arno, Roya and Var rivers). Those associated export fluxes defined as 'lithogenic events', are believed to result from a combination of forcing (winter mixing or Saharan events, in particular extreme ones), biological (zooplankton) activity, and also organic-mineral aggregation inducing a ballast effect. By fertilising the surface layer, mixed Saharan dust events were shown to be able to induce 'lithogenic events' during the stratification period. These events would be more efficient in transferring POC to the deeper layers than the spring bloom itself. The extreme Saharan event of February 2004 exported similar to 45% of the total annual POC, compared to an average of similar to 25% for the bloom period. This emphasises the role played by these 'lithogenic events', and in particular those that are induced by the more extreme Saharan events, in the carbon export efficiency in the North-western Mediterranean Sea.
PY 2010
PD MAR
SO Biogeosciences
SN 1726-4170
PU Copernicus Gesellschaft Mbh
VL 7
IS 3
UT 000276180300002
BP 809
EP 826
DI 10.5194/bg-7-809-2010
ID 42028
ER

EF