Radionuclides and silicate measured on water bottle samples during POLARSTERN cruise ANT-X/6 ...

• Main Author: Friedrich, Jana
• Format: Dataset
• Language: English
• Published: PANGAEA 1997
• Subjects: Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; DEPTH, water; Lead-210; Lead-210, standard deviation; Polonium-210; Polonium-210, standard deviation; Radium-226; Silicate; Sampling gear, diverse; CTD/Rosette; Continuous Flow Automated Analysis Gordon et al., 1993, WOCE Tech Rpt 93-1; ANT-X/6; ANT-XI/4; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Antarctic; Austral; The Antarctic; Weddell; Weddell Sea; Antarc*; Antarktis*
• Online Access: https://dx.doi.org/10.1594/pangaea.52064; https://doi.pangaea.de/10.1594/PANGAEA.52064

In this thesis the distribution of 210Po and 210Pb in the upper 600 m of the Antarctic Circumpolar Current and the Weddell Sea was investigated along north-south transects in austral spring and autumn. 210Po and 210Pb can serve as sensitive tracers for the special hydrographic conditions of the Antarctic Circumpolar Current and the Weddell Sea as well as for biological processes during phytoplankton blooms. The 210Po/210Pb disequilibrium was used as a tracer for particle export. This tracer integrates export on a timescale of 276 days because of the 138 day half-life of 210Po and complements the 234Th/238U disequilibrium as another tracer for plankton production arid export on a shorter timescale of several weeks.The distribution of 210Pb and its granddaughter 210Po is determined by the hydrographic conditions, through decay of 226Ra in the water column and low atmospheric 210Pb input, especially in the study area, and is modified by biological processes in the surface water. Low 226Ra activity north of the ... : Supplement to: Friedrich, Jana (1997): Polonium-210 und Blei-210 im Südpolarmeer: Natürliche Tracer für biologische und hydrographische Prozesse im Oberflächenwasser des Antarktischen Zirkumpolarstroms und des Weddellmeeres (Polonium-210 and Lead-210 in the Southern Polar Ocean: Naturally occurring tracers of biological and hydrographical tracers of biological and hydrographical processes in the surface waters of the Antarctic Circumpolar Current and the Weddell Sea). Berichte zur Polarforschung = Reports on Polar Research, 235, 155 pp ...