{"id":117250,"date":"2026-09-11T17:03:16","date_gmt":"2026-09-11T15:03:16","guid":{"rendered":"https:\/\/nilu.gnist.dev\/publikasjoner\/aerosol-optical-properties-calculated-from-size-distributions-filter-samples-and-absorption-photometer-data-at-dome-c-antarctica-and-their-relationships-with-seasonal-cycles-of-sources\/"},"modified":"2026-09-11T17:03:16","modified_gmt":"2026-09-11T15:03:16","slug":"aerosol-optical-properties-calculated-from-size-distributions-filter-samples-and-absorption-photometer-data-at-dome-c-antarctica-and-their-relationships-with-seasonal-cycles-of-sources","status":"publish","type":"nva_publication","link":"https:\/\/nilu.gnist.dev\/en\/publications\/aerosol-optical-properties-calculated-from-size-distributions-filter-samples-and-absorption-photometer-data-at-dome-c-antarctica-and-their-relationships-with-seasonal-cycles-of-sources\/","title":{"rendered":"Aerosol optical properties calculated from size distributions, filter samples and absorption photometer data at Dome C, Antarctica, and their relationships with seasonal cycles of sources"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Optical properties of surface aerosols at Dome C, Antarctica, in 2007\u20132013 and their potential source areas are presented. Scattering coefficients (\u03c3sp) were calculated from measured particle number size distributions with a Mie code and from filter samples using mass scattering efficiencies. Absorption coefficients (\u03c3ap) were determined with a three-wavelength Particle Soot Absorption Photometer (PSAP) and corrected for scattering by using two different algorithms. The scattering coefficients were also compared with \u03c3sp measured with a nephelometer at the South Pole Station (SPO). The minimum \u03c3ap was observed in the austral autumn and the maximum in the austral spring, similar to other Antarctic sites. The darkest aerosol, i.e., the lowest single-scattering albedo \u03c9o\u22480.91, was observed in September and October and the highest \u03c9o\u22480.99 in February and March. The uncertainty of the absorption \u00c5ngstr\u00f6m exponent \u03b1ap is high. The lowest \u03b1ap monthly medians were observed in March and the highest in August\u2013October. The equivalent black carbon (eBC) mass concentrations were compared with eBC measured at three other Antarctic sites: the SPO and two coastal sites, Neumayer and Syowa. The maximum monthly median eBC concentrations are almost the same (\u2009ng\u2009m\u22123) at all these sites in October\u2013November. This suggests that there is no significant difference in eBC concentrations between the coastal and plateau sites. The seasonal cycle of the eBC mass fraction exhibits a minimum f(eBC) \u22480.1\u2009% in February\u2013March and a maximum \u223c4\u2009%\u20135\u2009% in August\u2013October. Source areas were calculated using 50\u2009d FLEXPART footprints. The highest eBC concentrations and the lowest \u03c9o were associated with air masses coming from South America, Australia and Africa. Vertical simulations that take BC particle removal processes into account show that there would be essentially no BC particles arriving at Dome C from north of latitude 10\u2218\u2009S at altitudes <\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false,"_searchwp_excluded":"","_id":"","_status":"PUBLISHED","_sync_date":"2026-09-11 14:26:10","footnotes":""},"nva_tax_category":[1099],"class_list":["post-117250","nva_publication","type-nva_publication","status-publish","hentry","nva_tax_category-scientific-journal-publication"],"acf":[],"_links":{"self":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication\/117250","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication"}],"about":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/types\/nva_publication"}],"version-history":[{"count":0,"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication\/117250\/revisions"}],"wp:attachment":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/media?parent=117250"}],"wp:term":[{"taxonomy":"nva_tax_category","embeddable":true,"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_tax_category?post=117250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}