English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

After the accident in the Japanese Fukushima Dai-ichi nuclear power plant inMarch 2011 large amounts of radioactivity were released and distributed in theatmosphere. Among them were also radioactive noble gas isotopes which can beused as tracers to test global atmospheric circulation models. This workpresents unique measurements of the radionuclide $^{133}$Xe from Fukushima inthe upper troposphere above Germany. The measurements involve air sampling in aresearch jet aircraft followed by chromatographic xenon extraction andultra-low background gas counting with miniaturized proportional counters. Withthis technique a detection limit of the order of 100 $^{133}$Xe atoms inlitre-scale air samples (corresponding to about 100 mBq/m$^3$) is achievable.Our results provide proof that the $^{133}$Xe-rich ground level air layer fromFukushima was lifted up to the tropopause and distributed hemispherically.Moreover, comparisons with ground level air measurements indicate that thearrival of the radioactive plume at high altitude over Germany occurred severaldays before the ground level plume.

Detection of $^{133}$Xe from the Fukushima nuclear power plant in the upper troposphere above Germany