TY  - JOUR
AU  - M. Legrand, R. Weller
PY  - 2021//
TI  - Ammonium in Antarctic Aerosol: Marine Biological Activity Versus Long-Range Transport of Biomass Burning
KW  - aerosol black carbon ammonium Antarctic biomass burning et marine biota oxalate potassium
N2  - Year-round records of the ionic composition of Antarctic aerosol were obtained at the inland Dome C (DC) and coastal Neumayer (NM) sites, with additional observations of black carbon (BC) at NM. Discussions focus on the origin of ammonium in Antarctica. This first Antarctic atmospheric study of several species emitted by biomass burning (BB) indicates that BC and oxalate reach a maximum in October in relation to BB activity in the southern hemisphere. Ammonium reaches a maximum 2 months later, suggesting that BB remains a minor ammonium source there. The ammonium maximum in December coincides with the occurrence of diatom blooms in the austral ocean, suggesting that oceanic ammonia emissions are the main source of ammonium in Antarctica. The ammonium to sulfur-derived biogenic species molar ratio of 0.15 in summer suggests far lower ammonia emissions from the Antarctic oceans than midlatitude southern oceans.
SN  - 1944-8007
UR  - http://dx.doi.org/10.1029/2021GL092826
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=8252), last updated on Mon, 01 Jul 2024 14:12:56 +0200
ID  - M.Legrand2021
ER  -