Type |
Article |
Date |
2021-03 |
Language |
English |
Author(s) |
Jacquet Stéphanie Hm1, Lefèvre Dominique1, Tamburini Christian1, Garel Marc1, Le Moigne Frédéric Ac1, Bhairy Nagib1, Guasco Sophie1 |
Affiliation(s) |
1 : Aix Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 13288 Marseille, France |
Source |
Biogeosciences (1726-4170) (Copernicus GmbH), 2021-03 , Vol. 18 , N. 6 , P. 2205-2212 |
DOI |
10.5194/bg-18-2205-2021 |
WOS© Times Cited |
1 |
Abstract |
n the ocean, remineralization rate associated with sinking particles is a crucial variable. Since the 1990s, particulate biogenic barium (Baxs) has been used as an indicator of carbon remineralization by applying a transfer function relating Baxs to O2 consumption (Dehairs's transfer function, Southern Ocean-based). Here, we tested its validity in the Mediterranean Sea (ANTARES/EMSO-LO) for the first time by investigating connections between Baxs, prokaryotic heterotrophic production (PHP) and oxygen consumption (JO2-Opt; optodes measurement). We show that (1) higher Baxs (409 pM; 100–500 m) occurs in situations where integrated PHP (PHP100/500=0.90) is located deeper, (2) higher Baxs occurs with increasing JO2-Opt, and (3) there is similar magnitude between JO2-Opt (3.14 mmol m−2 d−1; 175–450 m) and JO2-Ba (4.59 mmol m−2 d−1; transfer function). Overall, Baxs, PHP and JO2 relationships follow trends observed earlier in the Southern Ocean. We conclude that such a transfer function could apply in the Mediterranean Sea. |
Full Text |
File |
Pages |
Size |
Access |
Preprint |
23 |
699 KB |
Open access |
Publisher's official version |
8 |
954 KB |
Open access |
|