Unbekannt
PANGAEA
In:
Supplement to: Weller, Rolf; Levin, Ingeborg; Schmithüsen, Dominik; Nachbar, Mario; Asseng, Jölund; Wagenbach, Dietmar (2014): On the variability of atmospheric 222Rn activity concentrations measured at Neumayer, coastal Antarctica. Atmospheric Chemistry and Physics, 14(8), 3843-3853, https://doi.org/10.5194/acp-14-3843-2014
Publikationsdatum:
2023-05-15
Beschreibung:
We report on continuously measured 222Rn activity concentrations in near-surface air at Neumayer Station in the period 1995-2011. This 17-year record showed no long-term trend and has overall mean ± standard deviation of (0.019 ± 0.012) Bq/m**3. A distinct and persistent seasonality could be distinguished with maximum values of (0.028 ± 0.013) Bq/m**3 from January to March and minimum values of (0.015 ± 0.009) Bq/m**3 from May to October. Elevated 222Rn activity concentrations were typically associated with air mass transport from the Antarctic Plateau. Our results do not support a relation between enhanced 222Rn activity concentrations at Neumayer and cyclonic activity or long-range transport from South America. The impact of oceanic 222Rn emissions could not be properly assessed but we tentatively identified regional sea ice extent (SIE) variability as a significant driver of the annual 222Rn cycle.
Schlagwort(e):
Air chemistry observatory; Atmospheric Chemistry @ AWI; AWI_AC; DATE/TIME; Date/time end; Dronning Maud Land, Antarctica; Duration, number of days; HEIGHT above ground; Neumayer_based; Neumayer_SPUSO; NEUMAYER III; Radon-222 activity; SPUSO
Materialart:
Dataset
Format:
text/tab-separated-values, 17121 data points
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