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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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.
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: 8 m * Maximum HEIGHT above ground: 8 m
|#||Name||Short Name||Unit||Principal Investigator||Method/Device||Comment|
|1||HEIGHT above ground||Height||m||Geocode|
|3||Date/time end||Date/time end||Weller, Rolf|
|4||Duration, number of days||Duration||days||Weller, Rolf|
|5||Radon 222 activity||222Rn||Bq/m3||Weller, Rolf||indirectly determined by alpha activity of the progenies 218Po and 214Po measured with a radon monitor|
17121 data points