Arsenic Species in the Southern Ocean, March 1998 Transect

March 1998 data on arsenic species production in the Subantarctic Zone of the Southern Ocean. Surface and vertical profile samples were collected along a meridional transect south of Australia, from 42°S to 55°S. The dataset was produced by the organization AU_AADC and is hosted on NASA's EarthData platform.

Use Cases

• Study the spatial distribution of arsenic species (As(V), As(III), MMA, DMA) across oceanographic fronts.
• Investigate correlations between methyl arsenic production and water temperature or biological productivity.
• Analyze changes in the DMA/MMA ratio in relation to shifts in microalgal community composition.
• Compare arsenic speciation in phosphate-replete, low-productivity Southern Ocean waters with other oceanic sites.

Strengths

• Includes specific concentration thresholds, such as As(III) being below 0.04 nM.
• Provides quantified percentages for biological arsenic conversion, e.g., 2.5% in the Subtropical Convergence Zone.
• Covers a defined spatial transect with samples approximately every degree of latitude from 42°S to 55°S.
• Contains both surface transect data and representative vertical profiles from four distinct oceanographic zones.

Limitations

• Last updated 1998-04-01 23:59:59.999000; freshness should be verified.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

AU_AADC via nasa_earthdata

Collection Method

Surface and vertical water column sampling during a research cruise.

Time Range

March 1998

Freshness

1998-04-01 23:59:59.999000

Geography

Southern Ocean, Subantarctic Zone south of Australia along 141°30' E from 42°S to 55°S.