The expeditions ANTARKTIS XVIII/1-2 of the research vessel Polarstern

• Main Authors: Smetacek, Victor, Bathmann, Ulrich, El Naggar, Saad El Dine
• Format: Book
• Language: unknown
• Published: 2001
• Subjects: Antarctic; Las Palmas; Antarc*; Antarktis*; Berichte zur Polar- und Meeresforschung; Reports on Polar and Marine Research
• Online Access: https://epic.awi.de/id/eprint/4816/; https://hdl.handle.net/10013/epic.15384

The first leg of the 18th Antarctic cruise of RV "Polarstern" was started in Bremerhaven on 29.09.2000 and was completed in Cape Town on 23.10.2000. During this cruise different scientific instrumentations were tested and an atmospheric marine program was carried out. The ship was sailed on the shortest way to Cape Town (Fig. 1). The transfer time was about 24 days including 2 days for station works between Bremerahaven and Las Palmas for testing the winchs and the new machine control system. An other station of about 6 hours was carried out nearby Cape Blanc to recover one mooring at approx. 21°17 N; 20°43 W and redeploy it at the same position. A part of the testing crew (AWI, INTER, RFL, ROCHEM, MTU, STNH, WERUM) was disembark on 08.10.2000 in Gran Canaria (Las Palmas).During the third step of the Midlife Conversion (MC) of RV "Polarstern" between 29.8.2000 - 29.09.2000 in Bremerhaven, the main machine control system was replaced by the company "Motoren und Turbinen Union, (MTU)", Friedrichshafen. The winch's power supply and control system was also replaced by the company "STN-Atlas-Elektronik", Hamburg and Bremerhaven. Sea trials of the mentioned systems were carried out during this cruise.The old data acquisation and display system of RV "Polarstern" (PODEV) was replaced by a new (PODAS) on a real-time based data management system (RTDBMS). The company WERUM, Lüneburg has been developed this software package and did the sea trial during the cruise.The on VMS-based computers (Digital Equipment) were replaced by SUN-Server (UNIX-based). More than 30 Compaq computers (Windows 2000) are installed for data display and acquisation. Installation and tests of the hardware has been carried out.The UV-B-group of AWI has measured the UV-B-irradiance distributions (spectral and doses measure ments) as a function of latitude. The AWI-spectrometer (UV-B & UV-A) and the electronic UV-B-personal dosimeter (ELUV-14) were used. Calibration of instruments was done. In addition, ozone profile soundings were carried out ...