Real-time Aerosol Chemistry Measurements from Southern Ocean Voyage

High-resolution, real-time measurements of non-refractory aerosol composition were collected during a 2024 Southern Ocean research voyage. The data includes nitrate, ammonium, sulfate, organics, chloride, and sea salt concentrations captured by a Time-of-Flight Aerosol Chemical Speciation Monitor (ToF-ACSM). This dataset was produced by the Australian Ocean Data Network as part of the Multidisciplinary Investigations of the Southern Ocean (MISO) voyage from January to March 2024.

Use Cases

• Analyze temporal trends in sulfate and nitrate concentrations to study anthropogenic influence on Southern Ocean air masses.
• Correlate sea salt aerosol measurements with wind speed and sea state data to model marine aerosol production.
• Investigate the relationship between organic aerosol mass and concurrent biological ocean data to trace biogenic emissions.
• Use high-resolution ammonium and chloride time-series to examine aerosol neutralization processes and acidity.
• Validate regional climate model outputs by comparing simulated aerosol composition against real-time nitrate, sulfate, and organics observations.

Strengths

• Data provides high-resolution, real-time measurements of multiple aerosol species.
• Measurements cover a continuous two-month period during the austral summer.
• Focuses on the critically under-sampled Southern Ocean region.

Limitations

• Sample size and temporal coverage are limited to a single two-month voyage.
• Spatial coverage is restricted to the ship track between Hobart and Fremantle.
• Data availability and format details are unspecified, with only HTML and PNG files listed.

Provenance

Source

Australian Ocean Data Network

Collection Method

Measured using a Time-of-Flight Aerosol Chemical Speciation Monitor (ToF-ACSM) aboard the RV Investigator.

Time Range

2 January to 5 March 2024 (AEST)

Freshness

Data is from early 2024, with metadata updated in April 2026.

Geography

Southern Ocean, voyage track from Hobart to Fremantle.