FN Archimer Export Format
PT J
TI Early winter barium excess in the Southern Indian Ocean as an annual remineralisation proxy (GEOTRACES GIPr07 cruise)
BT 
AF Van Horsten, Natasha René
   PLANQUETTE, Helene
   SARTHOU, Geraldine
   Ryan-Keogh, Thoams James
   Mtshali, Thato Nicholas
   Roychoudhury, Alakendra
   BUCCIARELLI, Eva
AS 1:1,2,3;2:1;3:1;4:2;5:4;6:3;7:5;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzane, France
   SOCCO, CSIR, Lower Hope road, Cape Town, South Africa
   TracEx, Department of Earth Sciences, Stellenbosch University, Stellenbosch, South Africa
   Department of Environment, Forestry and Fisheries, Oceans and Coast, Foretrust Building, Martin Hammerschlag Way, Cape Town, South Africa
   Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzane, France
C2 CNRS, FRANCE
   CSIR (SOUTH AFRICA), SOUTH AFRICA
   UNIV STELLENBOSCH, SOUTH AFRICA
   DEPARTM ENVIRONM FORESTRY FISHERIES OCEAN COAST, SOUTH AFRICA
   UBO, FRANCE
UM LEMAR
IN WOS Cotutelle UMR
   DOAJ
   copubli-int-hors-europe
   copubli-sud
IF 4.9
TC 0
UR https://archimer.ifremer.fr/doc/00683/79485/82077.pdf
   https://archimer.ifremer.fr/doc/00683/79485/94989.pdf
   https://archimer.ifremer.fr/doc/00683/79485/94990.pdf
   https://archimer.ifremer.fr/doc/00683/79485/94991.pdf
LA English
DT Article
AB The Southern Ocean is of global importance and processes such as mesopelagic remineralisation that impact the efficiency of the biological carbon pump in this region is of substantial interest. During this study the proxy barium excess which is utilised to shed light on mesopelagic remineralisation was measured at seven stations along 30° E in the Southern Indian Ocean during early austral winter of 2017. To our knowledge this is the first reported winter study utilising this proxy in the Southern Ocean. Concentrations of 59 to 684 pmol L−1 were comparable to those observed throughout other seasons, indicating that this proxy has a longer timescale than previously thought. Background barium excess values observed in deep waters were also similar to previous studies, not having declined down to an expected true Southern Ocean background value. It is apparent that processes driving the mesopelagic barium excess signal are still underway during early winter. Indicating that continuous remineralisation is sustained at levels comparable to summer, well after bloom termination. Moreover, linking integrated remote sensing primary production to the mesopelagic barium excess signal reiterates a longer timescale. The significant positive correlations obtained in the Antarctic and Subantarctic zones suggest that mesopelagic barium excess stock can be used as a remineralisation proxy on an annual timescale and possible inference of carbon remineralisation from remote sensing data on an annual and basin scale. 
PY 2022
PD JUN
SO Biogeosciences
SN 1726-4170
PU Copernicus GmbH
VL 19
IS 13
UT 000822749000001
BP 3209
EP 3224
DI 10.5194/bg-19-3209-2022
ID 79485
ER

EF