CFC, and noble gas measurements during POLARSTERN cruise ANT-XXIX/3 ...

• Main Authors: Huhn, Oliver, Rhein, Monika, Schröder, Michael
• Format: Dataset
• Language: English
• Published: PANGAEA 2016
• Subjects: Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; DEPTH, water; Freon-11 trichorofluoromethane; Freon-12 dichlorodifluoromethane; Helium; Helium, dHe-3; Neon; Bottle number; CTD/Rosette; ANT-XXIX/3; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarctic; Antarctic Peninsula; Arctic; Austral; Bransfield Strait; Breaker; Deception Island; The Antarctic; Weddell; Weddell Sea; Antarc*; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.864827; https://doi.pangaea.de/10.1594/PANGAEA.864827

During the austral summer expedition PS81, ANT-XXIX/3 with the German research ice breaker Polarstern in 2013, research was carried out to investigate the role of environmental factors on the distribution of benthic communities and marine mammal and krill densities around the northern tip of the Antarctic Peninsula. For these studies collated in this special issue and studies in this area, we present a collection of environmental parameters with probable influence on the marine ecosystems around the Antarctic Peninsula. ... : The tracer data set was carefully checked for accurate measurements and outliers. According to the WOCE standards the following flags were applied to each measurement: ? = flag 3 = doubtful; / = flag 4 = bad, # = flag 6 = mean of replicatesWe took water samples for stable noble gas isotopes (3He, 4He, Ne) (407 in copper tubes, 186 in AWS, of which 77 were replicate samples applying both sampling methods for inter-comparison) from 73 stations (profiles from bottom to surface) along 9 sections (7 in the north-western Weddell Sea, 2 in the Bransfield Strait, plus one extra station deployed from a life boat within the caldera of Deception Island). In total 421 samples were analyzed sucsessfull.In the IUP Bremen noble gas lab the samples are processed in a first step with a UHV (ultra high vacuum) gas extraction system. The required vacuum conditions are achieved by a rotary pump and an oil diffusion pump. To maintain contamination-free samples, the extraction system is checked for leaks on each sample ...