Continuously measured 222Rn activity concentrations (daily means) in near surface air at Neumayer Station in the period 1995 through 2011 ...

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 disting...

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Bibliographic Details
Main Authors: Weller, Rolf, Levin, Ingeborg, Schmithüsen, Dominik, Nachbar, Mario, Asseng, Jölund, Wagenbach, Dietmar
Format: Dataset
Language:English
Published: PANGAEA 2013
Subjects:
HEIGHT above ground
DATE/TIME
Date/time end
Duration, number of days
Radon-222 activity
Air chemistry observatory
Neumayer_based
NEUMAYER III
Atmospheric Chemistry @ AWI AWI_AC
Antarc*
Antarctic
Antarctica
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.822027
https://doi.pangaea.de/10.1594/PANGAEA.822027
Description
Summary: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. ... : 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 ...

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