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000173253 0247_ $$2doi$$a10.5194/acp-14-12725-2014
000173253 0247_ $$2ISSN$$a1680-7316
000173253 0247_ $$2ISSN$$a1680-7324
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000173253 037__ $$aFZJ-2014-06664
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000173253 1001_ $$0P:(DE-HGF)0$$aFadnavis, S.$$b0$$eCorresponding Author
000173253 245__ $$aTrends in peroxyacetyl nitrate (PAN) in the upper troposphere and lower stratosphere over southern Asia during the summer monsoon season: regional impacts
000173253 260__ $$aKatlenburg-Lindau$$bEGU$$c2014
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000173253 520__ $$aWe analyze temporal trends of peroxyacetyl nitrate (PAN) retrievals from the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) during 2002–2011 in the altitude range 8–23 km over the Asian summer monsoon (ASM) region. The greatest enhancements of PAN mixing ratios in the upper troposphere and lower stratosphere (UTLS) are seen during the summer monsoon season from June to September. During the monsoon season, the mole fractions of PAN show statistically significant (at 2σ) positive trends from 0.2 ± 0.05 to 4.6 ± 3.1 ppt yr−1 (except between 12 and 14 km) which is higher than the annual mean trends of 0.1 ± 0.05 to 2.7 ± 0.8 ppt yr−1. These rising concentrations point to increasing NOx (= NO + NO2) and volatile organic compound (VOC) emissions from developing nations in Asia, notably India and China.We analyze the influence of monsoon convection on the distribution of PAN in UTLS with simulations using the global chemistry–climate model ECHAM5-HAMMOZ. During the monsoon, transport into the UTLS over the Asian region primarily occurs from two convective zones, one the South China Sea and the other over the southern flank of the Himalayas.India and China host NOx-limited regimes for ozone photochemical production, and thus we use the model to evaluate the contributions from enhanced NOx emissions to the changes in PAN, HNO3 and O3 concentrations in the UTLS. From a set of sensitivity experiments with emission changes in particular regions, it can be concluded that Chinese emissions have a greater impact on the concentrations of these species than Indian emissions. According to SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY (SCIAMACHY) NO2 retrievals NOx emissions increases over India have been about half of those over China between 2002 and 2011.
000173253 536__ $$0G:(DE-HGF)POF2-233$$a233 - Trace gas and aerosol processes in the troposphere (POF2-233)$$cPOF2-233$$fPOF II$$x0
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000173253 7001_ $$0P:(DE-Juel1)6952$$aSchultz, Martin$$b1$$ufzj
000173253 7001_ $$0P:(DE-HGF)0$$aSemeniuk, K.$$b2
000173253 7001_ $$0P:(DE-HGF)0$$aMahajan, A. S.$$b3
000173253 7001_ $$0P:(DE-HGF)0$$aPozzoli, L.$$b4
000173253 7001_ $$0P:(DE-HGF)0$$aSonbawne, S.$$b5
000173253 7001_ $$0P:(DE-HGF)0$$aGhude, S. D.$$b6
000173253 7001_ $$0P:(DE-HGF)0$$aKiefer, M.$$b7
000173253 7001_ $$0P:(DE-HGF)0$$aEckert, E.$$b8
000173253 773__ $$0PERI:(DE-600)2069847-1$$a10.5194/acp-14-12725-2014$$gVol. 14, no. 23, p. 12725 - 12743$$n23$$p12725 - 12743$$tAtmospheric chemistry and physics$$v14$$x1680-7324$$y2014
000173253 8564_ $$uwww.atmos-chem-phys.net/14/12725/2014/
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000173253 9132_ $$0G:(DE-HGF)POF3-243$$1G:(DE-HGF)POF3-240$$2G:(DE-HGF)POF3-200$$aDE-HGF$$bMarine, Küsten- und Polare Systeme$$lAtmosphäre und Klima$$vTropospheric trace substances and their transformation processes$$x0
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000173253 9141_ $$y2014
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