Year-round chemical aerosol records at Kohnen, Antarctica obtained by automatic samplings


Aimed at year-round recording of the chemical aerosol composition in central Antarctica, an unattended operating aerosol sampler was successfully deployed at the EPICA deep drilling site in Dronning Maud Land (Kohnen Station). Analyses of teflon/nylon filter packs consecutively collected over bi-weekly intervals during the February 2003 to December 2005 period allowed to evaluate seasonal concentration variations of methane sulphonate (MS), Cl-, NO3-, non-sea salt (nss-)SO42- and Na+, while NH4+ and mineral dust related ion results remained below detection limits. For MS and nss-SO42 distinct late summer maxima around 44 and 200 ng/m3, respectively, were found, while (total) NO3- showed a broad November maximum of about 52 ng m-3. In contrast, the highest concentrations of Na+ with peak values of up to 160 ng/m3 were observed during the winter half year. The seasonality of these species broadly coincided with long-term observations at the coastal Neumayer Station, including surprisingly comparable NO3- levels. However, the biogenic sulphur and sea salt concentrations were lower at Kohnen by typically a factor of 2-3 and 10, respectively. The arrival of sea ice derived sea salt particles at Kohnen could not clearly detected, since even during mid-winter the nss-SO42- to Na+ ratio was generally too high to unambiguously identify a sulphur depleted sea salt SO4**2- fraction.

Supplement to: Weller, Rolf; Wagenbach, Dietmar (2007): Year-round chemical aerosol records in continental Antarctica obtained by automatic samplings. Tellus Series B-Chemical and Physical Meteorology, 59(4), 755-765

Related Identifier IsSupplementTo
Metadata Access
Creator Weller, Rolf ORCID logo; Wagenbach, Dietmar
Publisher PANGAEA
Publication Year 2007
Funding Reference Seventh Framework Programme Crossref Funder ID 243908 Climate Change: Learning from the past climate
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 432 data points
Discipline Chemistry; Natural Sciences
Spatial Coverage (0.068 LON, -75.002 LAT); Dronning Maud Land, Antarctica
Temporal Coverage Begin 2003-01-31T00:00:00Z
Temporal Coverage End 2005-12-01T00:00:00Z