Oxygen in the Tropical Pacific POSTRE II First Tracer Survey, Cruise No. M135, March 01 - April 08, 2017, Valparaiso (Chile) - Callao (Peru) POSTRE-III

Visbeck, Martin, Tanhua, Toste, Hopwood, Mark J., Salvatteci Merino, Franco Renato, L'Esperance, Chris, Eroglu, Suemeyya, Schmidtko, Sunke, Stramma, Lothar, Freund, Madeleine, Gross, Felix and Velazco, Frederico (2017) Oxygen in the Tropical Pacific POSTRE II First Tracer Survey, Cruise No. M135, March 01 - April 08, 2017, Valparaiso (Chile) - Callao (Peru) POSTRE-III UNSPECIFIED, Bonn, Germany. DOI 10.2312/cr_m135.

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Cruise M135 was a contribution to the DFG Collaborative Research Project (SFB) 754: “Climate-Biogeochemistry Interactions in the Tropical Ocean” with the main goal to better understand the the role of diffusive and advective pathways connecting water within the bottom boundary layer (i.e. the water directly affected by sediment processes) to the pelagic and surface ocean. To achieve this, we have injected a conservative tracer (CF3SF5) within the bottom boundary layer at three different sites along the Peruvian coast at a depth of about 300 m in October 2015 that was mapped during M135. Tracer sampling was carried out by measuring water samples from the CTD-rosette water bottles. In total 144 CTD casts were carried out. From 132 CTD profiles 2828 samples for CF3CF5 investigations were gained and on most stations the tracer could be found. In addition 48 trace metal CTD’s were recorded and trace metal and chemical samples taken from the rosette bottles. On 166 of the CTD profiles oxygen samples were taken and on 94 CTD profiles nutrient samples were collected. Microstructure measurements were made on 24 stations and 2 gliders were deployed. For geological investigations at 5 locations multicorer and long gravity cores were taken. Continuous underway measurements of CO2,N2O and CO as well as continuous ADCP and thermosalinograph recording was made on 37 days.
The cruise M135 was very successful; most systems on METEOR worked well and all planned objectives were reached.

Document Type: Report (Cruise Report)
Keywords: M135; R.V. Meteor; Cruise Report
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
OceanRep > SFB 754
Kiel University
DOI etc.: 10.2312/cr_m135
Projects: SFB754
Date Deposited: 11 Dec 2019 08:12
Last Modified: 11 Dec 2019 08:12
URI: http://eprints.uni-kiel.de/id/eprint/48379

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