Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Polarstern	PS83 ANT-XXIX/10	08.03.2014 - 13.04.2014		North Atlantic Ocean South Atlantic Ocean

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Deneke Hartwig	Leibniz-Instituts fur Tropospharenforschung e.V. (IfT)	Cape Town	Bremerhaven

Ziel der Reise / Objectives of Cruise:

As final cruise leg, the South-North transect ANT-XXIX/10(PS83) ended an exceptionally long research campaign in the Southern Hemisphere. After 1.5 years and overwintering in Antarctica, Polarstern commenced the return cruise to its home port on March 8th, 2014, with a slight delay at approximately 10pm from Cape Town. On board, there were 28 scientists and 42 crew members. Another 13 cruise participants came on board in the port of Las Palmas during an intermediate stop on April 1st. On the 13th of April, Polarstern reached the Northern Lock in Bremerhaven, and finally docked at the pier about 3pm. This last cruise leg was again used for detailed observations of the atmosphere, particularly aerosols, clouds and greenhouse gases, and the exchange between ocean and atmosphere. The instrumentation on board was for the first time complemented by a cloud radar from NOAA's Earth System Research Laboratory for vertical profiling of clouds. This opportunity was used for a comparison of our observations with those from the earth-observing satellites Cloudsat and Calipso, which also carry a cloud radar and aerosol-cloud lidar. For this purpose, the course of Polarstern was adjusted to exactly match the satellite orbits during the overflights. As further addition, spectroscopic measurements of the greenhouse gases carbon dioxide and methane were carried out during the cruise. Along the transect, observations of marine birds and mammals were made, and aquaria from Antarctica with fish captured during the previous cruise leg were transported back to the Alfred Wegner Institute. On the last part of the cruise after the stop in Gran Canaria, several instrumental tests were carried out. For the first time, the towed vehicle TRIAXUS was tested on board. Detailed tests of the multibeam echo sounder Hydrosweep DS3 were carried out, and measurements of the wave radar WaMoS II were compared against results from a wave buoy. Altogether, ANT-XXIX/10 was a very successful cruise without significant problems.

Messungen / Measurements