Deutsches Ozeanographisches
Datenzentrum Inventur der Sonne-Reise SO242-2 (DOD-Ref-No.20150120)
Inventory of Sonne Cruise SO242-2 (DOD-Ref-No.20150120)

Plattform
Platform
Reise-Nr.
Cruise-No.
Zeitraum
Period
Projekt
Project
Arbeitsgebiet
Working area
Sonne SO242-2 28.08.2015 - 01.10.2015   South Pacific Ocean  

Fahrtleiter
Chief Scientist
Institut
Institute
Auslaufhafen
Port of departure
Einlaufhafen
Port of return
Stationskarte
Station map
Schiffsroute
Trackchart
Boetius Antje Alfred-Wegener-Institut fur Polar- und Meeresforschung Guayaquil Guayaquil   

Ziel der Reise / Objectives of Cruise:

The scientific work during SO242/2 (28. August - 01. October 2015) was part of the JPIO Pilot Action ?Ecological Aspects of Deep-Sea Mining?. The main goal was to study the potential long-term ecological impact of anthropogenic disturbances on the deep-sea floor from mining polymetallic Mn-nodules. The expedition SO242 built on studies of the former German TUSCH projects (1989-1996) with four RV SONNE cruises to the DISCOL Experimental Area in the Peru Basin, South Pacific (7?S, 88.5? W; 4150 m water depth) between 1989 and 1996 (DISCOL and ATESEPP projects). The integrated ecological studies were carried out within and next to plough tracks of the original DISCOL experiment 1989, which mimicked seafloor disturbances similar to those occurring during nodule mining. Leg 242/2 extended the investigations started during leg 242/1 with a focus on biogeochemical and biological sampling and observations, including comparative studies of the composition of benthic communities (all size classes) as well as of ecosystem functions (remineralization rates, transfer of matter and energy in food webs, ecotoxicology). In addition, observations were continued of the physicochemical characteristics of the DEA, including the overlying benthic boundary layer. The nodule fields surrounding the DEA were used as references for undisturbed areas. A large proportion of the work was based on autonomous instruments and sensor modules that were deployed by means of ROV and lander systems. In addition, ROV-manipulated and telemetry-guided instruments such as the Ocean Floor Observatory System were used for targeted sampling and surveys. Food-web experiments including some small-scale disturbances were carried out and sampled directly at the seafloor by the ROV.

Messungen / Measurements

Institut
Institute
Wissenschaftler
Scientist
Anzahl
Number
Einheit
Unit
Typ der Messungen
Type of measurements
Kommentar
Comments
Daten im DOD
Data in DOD
AWI Boetius Antje 3 diving(s) B18
Zoobenthos
Benthic Crawler. no
AWI Boetius Antje 21 diving(s) B18
Zoobenthos
OFOS, photo and video transect. no
GEOMAH Haeckel Matthias 6 stations B18
Zoobenthos
Multicorer, Melofauna and Procariotes, Geochemistry. no
GEOMAH Haeckel Matthias 13 stations B18
Zoobenthos
Respiration Chamber Lander. no
AWI Boetius Antje 23 diving(s) G08
Bottom photography
Remotely Operated Vehicle (ROV). no
AWI Boetius Antje 1 n miles G90
Other geological or geophysical measurements
EM122, Parasound, ADCP yes
AWI Boetius Antje 12 stations H09
Water bottle stations
CTD, water samples, Nutrients, insitu pumps. no
AWI Boetius Antje 1 n miles H80
Other physical measurements
Underway measurements during the whole trip such as coordinates, depth, meteorological parameter and so on yes

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
AWI Boetius Antje D71 BoBO-Lander (Recovery from SO242-1) 7° 7.4' S 88° 25.5' W no
AWI Boetius Antje D71 DOS Lander, ADCP, CTD (Recovery from SO242-1) 7° 4.3' S 88° 29.0' W no
AWI Boetius Antje H72 Thermistor Mooring (Recovery rom SO242-1) 7° 7.4' S 88° 24.5' W no
17.8.2019