Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Polarstern	PS139/1	22.10.2023 - 03.11.2023		Atlantic Ocean

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Hanfland Claudia	Alfred-Wegener-Institut fur Polar- und Meeresforschung	Bremerhaven	Las Palmas

Ziel der Reise / Objectives of Cruise:

The expedition PS139 was the first leg of the Antarctic season 2023/24 and was used to transfer the ship to Cape Town. PS139 started in Bremerhaven on 22 October 2023 and ended in Cape Town on 22 November 2023. On 3 November 2023, a stopover took place in Las Palmas, which divided the journey into two legs, PS139/1 and PS139/2. The following en route measurements and activities were carried out during the entire voyage (legs 1 and 2): - A strip of seabed topography was bathymetrically surveyed along the entire route using the ship's internal hydroacoustic systems. The total cruise time of four weeks included several hours of station time for the calibration of the echo sounder systems using water sound velocity profilers as well as CTD casts. - High volume air samplers were used to continuously take samples on the monkey deck to measure chemical pollutants in the air. - Surface water samples were taken continuously via the ship's seawater in-take, also to measure chemical pollutants. - The isotopic signature of carbon in methane in the air was determined continuously using a mass spectrometer. The following working groups were on board until Las Palmas: - Staff of logistics and shipping company for work on the winch control system on board - Staff of AWI Polarstern II team for familiarization with the ship - POLMAR-TRAIN: master students from Universities of Bremen and Potsdam, department of geosciences, as well as doctoral candidates from AWI for a hands-on training in geophysical methods on the ship-mounted hydroacoustic systems. Next to bathymetric surveys of the seafloor with the multibeam echosounder Hydrosweep, the group also investigated the upper part of the sedimentary layer with the parametric sediment echosounder Parasound. - Staff of the Student Federal Competition in Artificial Intelligence - High school students from Auricher Wissenschaftstage

Messungen / Measurements