Deutsches Ozeanographisches
Datenzentrum Inventur der Poseidon-Reise 369 (DOD-Ref-No.20080190)
Inventory of Poseidon Cruise 369 (DOD-Ref-No.20080190)

Plattform
Platform
Reise-Nr.
Cruise-No.
Zeitraum
Period
Projekt
Project
Arbeitsgebiet
Working area
Poseidon 369 25.07.2008 - 04.08.2008   Gotland Basin Baltic Sea  

Fahrtleiter
Chief Scientist
Institut
Institute
Auslaufhafen
Port of departure
Einlaufhafen
Port of return
Stationskarte
Station map
Schiffsroute
Trackchart
Pfannkuche Olaf Leibniz-Institut fur Meereswissenschaften an der Universitat Kiel Kiel Kiel   

Ziel der Reise / Objectives of Cruise:

The scientific objectives focussed on redox-dependent nutrient and nitrogen cycles in the benthic boundary layer of the suboxic to anoxic Gotland Basin. We aimed to study release rates and inventories of nutrients and nitrogen compounds under varying degrees of bottom water oxygenation. Another goal was to quantify source/sink mechanisms of the benthic boundary layer for nitrogen species and nutrients under changing oxygen conditions to assess potential feedbacks on the upper mixed layer processes. The technological objectives were to test two newly designed benthic mesocosms (benthic chambers) which are deployed on the seafloor with a GEOMAR Modular Lander. In order to obtain these goal, we monitored the water column, sampled surface sediments and deployed a lander along a transect from oxygenated to suboxic and anoxic benthic boundary layer conditions. The cruise started and ended in Kiel (Germany) and led directly to the Gotland Basin. Station work was carried out between 57?15`N and 57? 30`N on a transect from the Latvijan EEZ beyond the 50m depth contour through the deepest part of the Gotland Basin (220m) to the Swedish EEZ beyond the 100m depth contour.

Messungen / Measurements

Institut
Institute
Wissenschaftler
Scientist
Anzahl
Number
Einheit
Unit
Typ der Messungen
Type of measurements
Kommentar
Comments
Daten im DOD
Data in DOD
IFMGEO Sommer Stefan 9 stations G04
Core-soft bottom (no. of cores)
Multiple corer samples for sedimeent geochemistry no
IFMGEO Pfannkuche Olaf 5 transects G08
Bottom photography
Video films and still photos of the sea floor no
IFMGEO Sommer Stefan 2 stations G71
In-situ sea floor measurements
Lander deployment of benthic chamber (in situ uptake of oxidants and nutrient fluxes) no
IFMGEO Pfannkuche Olaf 11 stations H10
CTD-Stations
Vertical depth profiles CTD/Rosette watersampler no
13.7.2019