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Project details

Title: Polar Cell Aerosol Nucleation (PCAN)
Id: 2513
Investigator(s): Ruhi Humphries
CSIRO Oceans & Atmosphere - Aspendale [details]

Description: Atmospheric aerosol populations in the Antarctic and Southern Ocean regions are key components of the global radiative balance and represent one of the few places on earth relatively untouched by anthropogenic influence. Recent investigations have shown that the region of the Polar Cell just north of the Antarctic continent is atmospherically distinct from those either north in the Southern Ocean, or on the continent itself. This region has only been measured a handful of times previously, and remains largely uncharacterised, yet the small number of observations showed unexpected properties uncharacteristic of the region. The objectives of this study are therefore to: • Increase the number and quality of atmospheric observations in a region that remains largely uncharacterised. • Characterise the chemical and physical properties of atmospheric aerosol populations in the northern region of the Antarctic Atmospheric Polar Cell • Understand the seasonal changes of the Polar Cell aerosol populations by comparing to springtime measurements at the same location taken in 2012 (AAD project #4032) • Observe the aerosol formation processes in the pristine atmosphere of the Antarctic polar cell. • Better understand the aerosol cloud interactions in the southern part of the Southern Ocean, which exhibits the largest biases in radiation. • Coordinate with measurements made as part of the Swiss-funded Antarctic Circumpolar Expedition (ACE) and NASA’s ATom mission to better understand the aerosol properties of the Southern Ocean in its entirety.
Years: 2017

Publications


List of surveys that this project was on.

Use [details] link to view survey details (map, reports, metadata etc) including links to download data.

Survey InvestigatorDescription
IN2017_V01

[details]
Leanne Armand (Macquarie University) RV Investigator voyage in2017_v01, titled "Interactions of the Totten Glacier with the Southern Ocean through multiple glacial cycles." The primary voyage objectives are: 1. To survey and map, using multibeam, subbottom profiler, bioacoustics echosounder and gravity profiling, by priority, the: a) Continental slope of the Sabrina coast margin, which are presumed to contain the canyons fed by outflow from the Totten Glacier. i) Area A4. ii) Area C4. b) Sabrina coast shelf region, which links the Totten Glacier to the slope, where sea ice free conditions permit. i) Area B. 2. To undertake seismic strike and dip lines, by priority, on the: a) continental slope of the Sabrina coast margin, using Italian and MNF seismic equipment, in day-light hours with respect to permitted Marine Mammal Observation protocols, in: i) Area A4. ii) Area C4. 3. To retrieve slope and shelf sediments, for a variety of palaeoceanographic, micropalaeontological, genomic and geochemical studies (as approved by ATEP and AMLR permits) on the: a) continental slope of the Sabrina coast margin (Priority Area A4 and C4). b) Sabrina coast shelf region (Area B), where sea-ice free conditions permit. 4. To retrieve water samples, for a variety of palaeoceanographic, microbiological, genomic and geochemical studies (and approved by AMLR permit), with reference to hydrochemical characterisation on the: a) continental slope of the Sabrina coast margin (Priority Area A4 and C4). b) Sabrina coast shelf region (Area B), where sea ice free conditions permit. 5. To record video and still imagery of the seafloor biota and geomorphological characteristics, for habitat mapping using deep tow video systems and multi-corer video on the: i. continental slope of the Sabrina coast margin (Priority Area A4 and C4), ii. Sabrina coast shelf region (Area B), which links the Totten Glacier to the slope, where sea ice free conditions permit. 6. To collect oceanographic and climatic parameters using expendable bathymetric (XBT), ADCP and underway instruments.
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