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ACE-1 - Southern Hemisphere marine aerosol characterisation experiment

Created 13/03/2025

Updated 13/03/2025

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Metadata record for data from ASAC Project 829 See the link below for public details on this project. From the abstract of one of the referenced papers: During the intensive field operations period (November 15 to December 14, 1995) of the First Aerosol Characterisation Experiment (ACE 1) cold front activity was generally above average, resulting in below average temperatures, pressures, and rainfall. The principal cause was the presence for much of the experiment of a long wave trough. This trough was mobile, traversing the ACE area during the project, with some warm anomalies evident in teh areas under the influence of the long wave ridges. There is evidence of greater convective activity than normal, possibly leading to a slightly deeper than average mixing layer. A greater west to northwesterly component to the air flow than average during November appears to have led to higher than average concentrations of radon and particles in the clean, marine or 'baseline'; sector at Cape Grim (190 degrees to 280 degrees). This is likely to have resulted from inclusion of continental air from western parts of the Australian mainland in the baseline sector winds. Although aerosol-bound sulfur species were generally near their normal concentrations across the ACE 1 area, the overall pattern including atmospheric dimethylsulfide suggest slightly higher than usual sulfur species levels in the southern part of the region and lower concentrations in the northern part during November. This could be related to changes in marine biogenic productivity, air-sea exchange, or atmospheric removal. In December, the changing long wave pattern brought an increase in south and southwesterly flow over the entire region. The baseline sector became less affected by continental species, but it appears that the colder conditions brought by this pattern have led to lower than usual atmospheric concentrations of biogenic species, as the region went into one of the coldest summers on record.

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Title ACE-1 - Southern Hemisphere marine aerosol characterisation experiment
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/649cd82d-5505-4188-9c8e-6370d6ad4f6a
Contact Point
CSIRO Oceans & Atmosphere
metadata@aad.gov.au
Reference Period 15/11/1995 - 14/12/1995
Geospatial Coverage {"type": "Polygon", "coordinates": [[[125.0, -60.0], [175.0, -60.0], [175.0, -40.0], [125.0, -40.0], [125.0, -60.0]]]}
Data Portal data.gov.au

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This dataset was originally found on data.gov.au "ACE-1 - Southern Hemisphere marine aerosol characterisation experiment". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/ace-1-southern-hemisphere-marine-aerosol-characterisation-experiment

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