FN Archimer Export Format
PT J
TI Vertical flux of trace elements associated with lithogenic and biogenic carrier phases in the Southern Ocean
BT 
AF Blain, S.
   Planquette, Helene
   Obernosterer, I.
   Guéneuguès, A.
AS 1:1;2:2;3:1;4:1;
FF 1:;2:;3:;4:;
C1 Sorbonne Université CNRS Laboratoire d’océanographie microbienne (LOMIC) 1 avenue Pierre Fabre66650 Banyuls sur mer, France
   CNRS IRD, Ifremer, LEMAR University of Brest Plouzané France
C2 UNIV SORBONNE, FRANCE
   CNRS, FRANCE
UM LEMAR
IN WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 5.2
TC 3
UR https://archimer.ifremer.fr/doc/00770/88197/93752.pdf
   https://archimer.ifremer.fr/doc/00770/88197/93753.pdf
LA English
DT Article
CR MD 205 / SOCLIM
BO Marion Dufresne
DE ;trace element;export;trace metal;southern ocean;diatoms;faecal pellets
AB Trace elements (TE) are tracers of multiple biotic and abiotic processes in the ocean and some of them are essential for marine life. Vertical export by particles is a major removal process of a large fraction of TE from the surface ocean. However, the seasonal export dynamics and its controlling factors, critical for the understanding of the internal TE cycling, remain poorly constrained. Here, we report and discuss the seasonal export of 15 TE in sinking particles collected by a sediment trap deployed in a highly productive region of the Southern Ocean. Basalt material was the main carrier phase for the export flux of 9 TE, and its dynamic was characterised by a strong decrease over time. TE export driven by biological carriers such as diatom spores and vegetative cells added pulsed seasonal dynamics to the lithogenic signal, while the contribution of fecal pellets was less variable over the season. For each TE, we were able to decipher the biological carrier phases that represent the most dominant export pathway. We discuss this partitioning with regards to the known metabolic functions of the different trace metals or TE of biological interest. 
PY 2022
PD MAY
SO Global Biogeochemical Cycles
SN 0886-6236
PU American Geophysical Union (AGU)
VL 36
IS 5
UT 000799051500001
DI 10.1029/2022GB007371
ID 88197
ER

EF