Ionic composition of Antarctic aerosol at Neumayer station (2011-2019)

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 at NM. Discussions focus on the origin of ammonium in Antarctica. This first Antarctic atmospheric study of several s...

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Bibliographic Details
Main Authors: Weller, Rolf, Legrand, Michel
Format: Dataset
Language:English
Published: PANGAEA 2021
Subjects:
aerosol
Air chemistry observatory
ammonium
AWI_stations
AWI Antarctic Land Expedition
biomass burning
black carbon
DATE/TIME
Dronning Maud Land
Antarctica
Duration
HEIGHT above ground
Ion chromatography
Methane sulfonic acid
Neumayer_SPUSO
Oxalate
Ratio
SPUSO
Sulfate
non-sea-salt
Antarctic
Austral
Neumayer
Neumayer Station
Austral Ocean
Antarc*
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.931366
https://doi.org/10.1594/PANGAEA.931366
Description
Summary: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 at NM. Discussions focus on the origin of ammonium in Antarctica. This first Antarctic atmospheric study of several species emitted by biomass burning indicates that black carbon, oxalate, and fine potassium reach a maximum in October in relation to biomass burning activity in the southern hemisphere. Ammonium reaches a maximum two months later, suggesting that biomass burning 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 polar ocean than mid-latitude southern oceans.

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