Deutsches Ozeanographisches
Datenzentrum
Inventur der Alkor-Reise 355 (DOD-Ref-No.20100331)
Inventory of Alkor Cruise 355 (DOD-Ref-No.20100331)
Plattform Platform |
Reise-Nr. Cruise-No. |
Zeitraum Period |
Projekt Project |
Arbeitsgebiet Working area |
---|---|---|---|---|
Alkor | 355 | 29.05.2010 - 21.06.2010 | HYPOX |
Baltic Sea Gotland Basin |
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:
Cruise AL-355 was carried out within the framework of the FP-7 project "HYPOX" (In situ monitoring of oxygen depletion in hypoxic ecosystems of coastal and open seas, and land-locked water bodies). The scientific objectives focussed on redox-dependent nutrient and nitrogen cycles in the benthic boundary layer of the suboxic to anoxic Gotland Basin. The scientific party comprised of scientist from the IFM-GEOMAR, Kiel (Germany). Main objectives were to study release rates and inventories of nutrients and nitrogen compounds under varying degrees of bottom water oxygenation in the anoxic to suboxic eastern Gotland Basin (central Baltic). 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. In order to obtain these goal, we monitored the water column, sampled surface sediments and deployed several landers along a transect from oxygenated to suboxic and anoxic benthic boundary layer conditions in the Latvian part of the eastern Gotland Basin. The cruise started and ended in Kiel (Germany) and led directly to the eastern Gotland Basin. Station work was carried out between 57?18'N and 57? 30'N on a transect in the Latvian EEZ beyond the 50m depth contour into the deeper part of the Gotland Basin (210m). The Port of Ventspils (Latvia) and the port of Visby (Gotland, Sweden) were visited.
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 | 14 | stations | G04 Core-soft bottom (no. of cores) |
Multiple corer samples for sediment geochemistry | no |
IFMGEO | Pfannkuche Olaf | 15 | 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 |
near seafloor oxygen measurements, eddy corelation technique | no |
IFMGEO | Sommer Stefan | 3 | stations | G71 In-situ sea floor measurements |
Lander deployment sediment profiling oxygen microsensors | no |
IFMGEO | Sommer Stefan | 8 | stations | G71 In-situ sea floor measurements |
Lander deployment of benthic chamber (in situ uptake of oxidants and nutrient and fluxes) | no |
IFMGEO | Pfannkuche Olaf | 12 | stations | H10 CTD-Stations |
vertical depth profiles CTD/Rosette watersampler, water chemistry | no |