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In-situ observation of Asian pollution transported into the Arctic lowermost stratosphere
Atmospheric Chemistry and Physics
<p><strong>Abstract.</strong> On a research flight on 10 July 2008, the German research aircraft Falcon sampled an air mass with unusually high carbon monoxide (CO), peroxyacetyl nitrate (PAN) and water vapour (H<sub>2</sub>O) mixing ratios in the Arctic lowermost stratosphere. The air mass was encountered twice at an altitude of 11.3 km, ~800 m above the dynamical tropopause. In-situ measurements of ozone, NO, and NO<sub>y</sub> indicate that this layer was a mixed air mass containing both airdoi:10.5194/acp-11-10975-2011 fatcat:wrjiez7lrncqvpiaayzhtxakya