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000017089 084__ $$2WoS$$aMeteorology & Atmospheric Sciences
000017089 1001_ $$0P:(DE-HGF)0$$aRoiger, A.$$b0
000017089 245__ $$aInsitu observation of Asian pollution transported in the Arctic lowermost stratosphere
000017089 260__ $$aKatlenburg-Lindau$$bEGU$$c2011
000017089 300__ $$a10975 - 10994
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000017089 440_0 $$09601$$aAtmospheric Chemistry and Physics$$v11$$x1680-7316$$y21
000017089 500__ $$3POF3_Assignment on 2016-02-29
000017089 500__ $$aThis work was supported by the Deutsche Forschungsgemeinschaft (DFG) under SPP 1294 (SCHL1857/2-1) and PAK 348 (SCHL1857/3-1). We thank the pilots, engineers and scientists from the DLR flight department for their excellent support during the campaign. Michael Lichtenstern and Paul Stock are greatly acknowledged for their help in acquiring this data set. We thank Gebhard Gunther (FZ-Julich) and Andreas Dornbrack for helpful discussions. Harald Sodemann and Andreas Stohl were funded by the Norwegian Research Council in the framework of POLARCAT-Norway. K. S. Law was supported by the ANR/CNRS-INSU POLARCAT-France project. The Arctic composite images were produced from geostationary and polar orbiting satellite retrievals by the Space Science and Engineering Center, University of Wisconsin-Madison (funded by the Arctic Natural Science Program, Office of Polar Programs, National Science Foundation Grant ARC-0713843). We acknowledge the University of Wyoming for providing sounding data to derive temperature profiles (http://weather.uwyo.edu/upperair/sounding.html).
000017089 520__ $$aOn 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 (H2O) mixing ratios in the Arctic lowermost stratosphere. The air mass was encountered twice at an altitude of 11.3 km, similar to 800 m above the dynamical tropopause. In-situ measurements of ozone, NO, and NOy indicate that this layer was a mixed air mass containing both air from the troposphere and stratosphere. Backward trajectory and Lagrangian particle dispersion model analysis suggest that the Falcon sampled the top of a polluted air mass originating from the coastal regions of East Asia. The anthropogenic pollution plume experienced strong uplift in a warm conveyor belt (WCB) located over the Russian east-coast. Subsequently the Asian air mass was transported across the North Pole into the sampling area, elevating the local tropopause by up to similar to 3 km. Mixing with surrounding Arctic stratospheric air most likely took place during the horizontal transport when the tropospheric streamer was stretched into long and narrow filaments. The mechanism illustrated in this study possibly presents an important pathway to transport pollution into the polar tropopause region.
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000017089 7001_ $$0P:(DE-HGF)0$$aSchlager, H.$$b1
000017089 7001_ $$0P:(DE-HGF)0$$aSchäfler, A.$$b2
000017089 7001_ $$0P:(DE-HGF)0$$aHuntrieser, H.$$b3
000017089 7001_ $$0P:(DE-HGF)0$$aScheibe, H.$$b4
000017089 7001_ $$0P:(DE-HGF)0$$aAufmhoff, H.$$b5
000017089 7001_ $$0P:(DE-HGF)0$$aCooper, O.$$b6
000017089 7001_ $$0P:(DE-HGF)0$$aSodemann, H.$$b7
000017089 7001_ $$0P:(DE-HGF)0$$aStohl, A.$$b8
000017089 7001_ $$0P:(DE-HGF)0$$aBurkhard, J.$$b9
000017089 7001_ $$0P:(DE-HGF)0$$aLazarra, M.$$b10
000017089 7001_ $$0P:(DE-Juel1)VDB1410$$aSchiller, C.$$b11$$uFZJ
000017089 7001_ $$0P:(DE-HGF)0$$aLaw, K.S.$$b12
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