Seawater chromium concentrations and isotope compositions in the Southern Ocean during the

ETH Zurich researcher Jörg Rickli collected dissolved seawater chromium concentrations and stable isotope compositions during the Antarctic Circumnavigation Expedition's austral summer of 2016/2017. The dataset includes samples from a north-south transect between Tasmania and Antarctica, near the Balleny Islands, and in the Drake Passage, collected down to 1000 meters depth. Measurements represent bulk seawater chromium and were obtained using the double-spike technique.

Use Cases

• Modeling chromium cycling and speciation in the Southern Ocean based on concentration and isotope data.
• Investigating trace metal sources and sinks along Antarctic coastal transects based on the described sampling stations.
• Calibrating or validating oceanographic models with in-situ chromium measurements from the described depth profiles.
• Studying the impact of glacial meltwater on seawater chemistry using data from stations near the Mertz Glacier.

Strengths

• Samples were collected using a trace metal clean rosette system and filtered in a class 100 clean container, indicating rigorous contamination control.
• Data covers multiple distinct regions of the Southern Ocean, including a transect, the Balleny Islands, and the Drake Passage.
• Depth profiles extend to 1000 meters, providing vertical resolution of chromium distribution.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Jörg Rickli, ETH Zurich

Collection Method

Samples collected via trace metal clean rosette, filtered, acidified, and analyzed using the double-spike technique.

Time Range

Austral summer of 2016/2017

Geography

Southern Ocean, including transect from Hobart, Tasmania to Mertz Glacier, Antarctica; Balleny Islands region; Drake Passage