FN Archimer Export Format PT J TI OUTPACE long duration stations: physical variability, context of biogeochemical sampling, and evaluation of sampling strategy BT AF DE VERNEIL, Alain ROUSSELET, Louise DOGLIOLI, Andrea M. PETRENKO, Anne A. MAES, Christophe BOURUET-AUBERTOT, Pascale MOUTIN, Thierry AS 1:1,4;2:1;3:1;4:1;5:2;6:3;7:1; FF 1:;2:;3:;4:;5:;6:;7:; C1 Aix Marseille Univ, Univ Toulon, CNRS, IRD,MIO UM 110, F-13288 Marseille, France. UBO, CNRS, LOPS, Ifremer,IRD,IUEM, F-29280 Brest, France. Univ Paris 06, Sorbonne Univ, UPMC, CNRS IRD MNHN,LOCEAN, Paris, France. New York Univ Abu Dhabi, Ctr Prototype Climate Modeling, Abu Dhabi, U Arab Emirates. C2 UNIV AIX MARSEILLE, FRANCE IRD, FRANCE UNIV PARIS 06, FRANCE UNIV ABU DHABI, UNITED ARAB EMIRATES UM LOPS IN DOAJ IF 3.951 TC 13 UR https://archimer.ifremer.fr/doc/00420/53122/54075.pdf https://archimer.ifremer.fr/doc/00420/53122/56191.pdf https://archimer.ifremer.fr/doc/00420/53122/56192.pdf LA English DT Article CR BOUM OLIPAC OUTPACE PROSOPE BO L'Atalante Thalassa AB Research cruises to quantify biogeochemical fluxes in the ocean require taking measurements at stations lasting at least several days. A popular experimental design is the quasi-Lagrangian drifter, with in situ incubations that follow the flow of water over time. The ship then tracks the drifter because subsequent measurements are supposed to remain in the same water environment. An outstanding question is how to best determine whether this is true. During the Oligotrophy to UlTra-oligotrophy PACific Experiment (OUTPACE) cruise, from 18 February to 3 April 2015 in the western tropical South Pacific, three separate stations of long duration (five days) over the upper 500 m were conducted in this quasi-Lagrangian sampling scheme. Here we present physical data to provide context for these three stations and to assess whether the sampling strategy worked, i.e. that indeed a single body of water was sampled. After analyzing tracer variability and local water circulation at each station, we argue that, while no realization will be truly Lagrangian, all long duration three stations were conducted in their own sufficiently self-similar physical environment during OUTPACE. By directly addressing the concerns raised by these quasi-Lagrangian sampling platforms, a protocol of best practices can begin to be formulated so that future research campaigns include the complementary datasets and analyses presented here to verify the appropriate use of the drifter platform. PY 2018 PD APR SO Biogeosciences SN 1726-4170 PU Copernicus Gesellschaft Mbh VL 15 IS 7 UT 000429598100003 BP 2125 EP 2147 DI 10.5194/bg-15-2125-2018 ID 53122 ER EF