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AbstractAbstract
[en] Continuous measurements of atmospheric 222Rn were made for the past three years by the Environmental Measurements Laboratory (EML) at the Atmosphere/Ocean Chemistry Experiment site located at Tudor Hill, Bermuda and at the National Oceanic and Atmospheric Administration/Climate Monitoring and Diagnostics Laboratory Mauna Loa Observatory. The 222Rn analyzer is based on the two filter tube method. At the Bermuda site, monthly median 222Rn concentrations range from ∼50 to 700 mBq m-3, and the concentrations very seasonally, with a maximum in the winter and a minimum in the summer. The concentrations are significantly elevated when local winds traverse the island. At MLO, monthly median 222Rn range from ∼100 mBq m-3 during the fall months to ∼400 mBq m-3 during the spring months. The springtime maximum values correspond to periods of rapid transport in the free troposphere from the Asian continent, corroborated by backward air mass trajectories. The 222Rn data are also used to help decipher local daily upslope/downslope conditions present at MLO. This study illustrates the value of atmospheric 222Rn monitoring, when screened through the filter of local meteorology, in studying the transport of continental air to the oceans, as well as the dynamics of local meteorological effects. (author) 11 refs.; 10 figs
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Source
MARC-III: 3. International conference on methods and applications of radioanalytical chemistry. Pt.4; Kailua-Kona, HI (United States); 10-16 Apr 1994
Record Type
Journal Article
Literature Type
Conference
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731; ; CODEN JRNCDM; v. 193(2); p. 309-318
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