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Weller, Rolf; Levin, Ingeborg; Schmithüsen, Dominik; Nachbar, Mario; Asseng, Jölund; Wagenbach, Dietmar (2013): Continuously measured 222Rn activity concentrations (daily means) in near surface air at Neumayer Station in the period 1995 through 2011. PANGAEA, https://doi.org/10.1594/PANGAEA.822027, Supplement to: Weller, R et al. (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

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Abstract:
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.
Project(s):
Coverage:
Latitude: -70.650000 * Longitude: -8.250000
Date/Time Start: 1995-01-14T00:00:00 * Date/Time End: 2011-12-31T00:00:00
Minimum HEIGHT above ground: m * Maximum HEIGHT above ground: m
Event(s):
Neumayer_SPUSO * Latitude: -70.650000 * Longitude: -8.250000 * Date/Time: 1983-01-01T00:00:00 * Elevation: 42.0 m * Location: Dronning Maud Land, Antarctica * Campaign: AWI_stations * Device: Air chemistry observatory (SPUSO)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1HEIGHT above groundHeightmGeocode
2DATE/TIMEDate/TimeGeocode
3Date/time endDate/time endWeller, Rolf
4Duration, number of daysDurationdaysWeller, Rolf
5Radon 222 activity222RnBq/m3Weller, Rolfindirectly determined by alpha activity of the progenies 218Po and 214Po measured with a radon monitor
Size:
17121 data points

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