Deutsches Ozeanographisches
Datenzentrum Inventur der Poseidon-Reise POS464 (DOD-Ref-No.20140047)
Inventory of Poseidon Cruise POS464 (DOD-Ref-No.20140047)

Plattform
Platform
Reise-Nr.
Cruise-No.
Zeitraum
Period
Projekt
Project
Arbeitsgebiet
Working area
Poseidon POS464 03.02.2014 - 19.02.2014   NW Atlantic (Limit 40?W)  

Fahrtleiter
Chief Scientist
Institut
Institute
Auslaufhafen
Port of departure
Einlaufhafen
Port of return
Stationskarte
Station map
Schiffsroute
Trackchart
Fischer Gerhard Universitat Bremen, Zentrum fur Marine Umweltwissenschaften Las Palmas Las Palmas   

Ziel der Reise / Objectives of Cruise:

We performed optical, microbial, biological and geochemical studies in the water column as well as the exchange of two sediment trap moorings off Cape Blanc (CB and CBi). Both were planned as long-term study sites in an important coastal upwelling filament (Eastern Boundary Upwelling Ecosystem) with strong productivity gradients: CB as a mesotrophic site has started in 1988 and CBi as a eutrophic site monitors particle flux since 2003. Both were deployed during RV POS 445 cruise in January 2013. Further, we deployed 4 drifting arrays with cylindrical traps for 1-2 days each, combined with a newly developed Driftcam on an E-W transect between the two long-term sediment trap mooring sites. Additionally, a particle camera was launched to measure the distribution and size of marine snow aggregates and other larger particles. For the sampling of suspended particles, we used in situ-pumps which collect fine particles in larger quantities, generally overnight. To study zooplankton abundance and distribution, we used the multinet with 5 nets, if possible for day- and night hauls to consider dial vertical migration of zooplankton. The studies were completed by roller tank incubation experiments with artificial marine snow aggregates of which respirations rates and sinking rates were determined. For the first time, we did sampling to investigate the nitrogen cycle within marine snow aggregates. Weather conditions were not optimal during the entire cruise and we had winds mostly with 6-8 on the Beaufort scale. Despite these conditions, we worked on 11 stations on a E-W transect off Cape Blanc, deploying and recovering four long-term moorings and four drifting arrays. The other deployments were: multinet (6x), hand net (4x), Secchi disk (5x), ParCa-CTD (17x), rosette-CTD (13x) and the in situ-pumps (4x overnight), in total 65 deployments. We could fulfil more than we expected and had a very successful cruise.

Messungen / Measurements

Institut
Institute
Wissenschaftler
Scientist
Anzahl
Number
Einheit
Unit
Typ der Messungen
Type of measurements
Kommentar
Comments
Daten im DOD
Data in DOD
MARUM Fischer Gerhard 6 deployment B09
Zooplankton
multinet with 5 nets, 200?m, down to 1000m. no
MARUM Iversen Morten 4 deployment B09
Zooplankton
handnet 75?m, down to 50m. no
MARUM Iversen Morten 13 deployment H09
Water bottle stations
rosette with CTD, water for phytoplankton, nutrients and primary production. no
MARUM Iversen Morten 5 deployment H17
Optics (e.g. underwater light levels)
Secchi disk for 10% light level. no
MARUM Nowald Nicolas 17 deployment H17
Optics (e.g. underwater light levels)
particle camera with CTD-oxygen-turbidity-chl fluorescence. no
AWI Mollenhauer Gesine 4 deployment P01
Suspended matter
in situ pumps for 4-6 hours, special filters for lipid components. no

Verankerungen / Moorings

Institut
Institute
Wissenschaftler
Scientist
Typ der Messungen
Type of measurements
Kommentar
Comments
geogr.Breite
Latitude
geogr.Länge
Longitude
Daten im DOD
Data in DOD
MARUM Fischer Gerhard B71 drifting array with 3 traps and camera 20° 48.0' N 18° 45.0' W no
MARUM Fischer Gerhard B71 drifting array with 3 traps and camera 20° 56.0' N 19° 26.0' W no
MARUM Fischer Gerhard B71 drifting array with 3 traps and camera 21° 16.0' N 20° 50.0' W no
MARUM Fischer Gerhard B71 two sediment trap mooring 21° 18.0' N 20° 51.0' W no
MARUM Fischer Gerhard B71 two sediment trap mooring with multisensor platform (optics, CTD) 20° 47.0' N 18° 45.0' W no
9.11.2019