000890289 001__ 890289
000890289 005__ 20240709081747.0
000890289 0247_ $$2doi$$a10.5194/egusphere-egu2020-18635
000890289 037__ $$aFZJ-2021-00870
000890289 1001_ $$0P:(DE-HGF)0$$aGeorge, Midhun$$b0$$eCorresponding author
000890289 1112_ $$aEGU 2020$$cOnline$$d2020-05-04 - 2020-05-08$$wonline
000890289 245__ $$aInvestigation of the photochemical activity in different MPC outflows during EMeRGe
000890289 260__ $$c2020
000890289 3367_ $$033$$2EndNote$$aConference Paper
000890289 3367_ $$2DataCite$$aOther
000890289 3367_ $$2BibTeX$$aINPROCEEDINGS
000890289 3367_ $$2DRIVER$$aconferenceObject
000890289 3367_ $$2ORCID$$aLECTURE_SPEECH
000890289 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1611743935_26809$$xOther
000890289 520__ $$a<p>Since peroxy radicals are closely involved in a number of tropospheric chemical processes like O<sub>3</sub> budget, hydrocarbon oxidation and acid formation, the accurate measurement of these radicals can provide essential information to improve our understanding of processing and transformation of polluted outflows from megacities and Major Population Centres (MPCs).</p><p>Airborne measurements of the total sum of peroxy radicals, RO<sub>2</sub>* &#160;= HO<sub>2</sub> + &#8721; RO<sub>2</sub>, where R is an organic group, were conducted in Europe in summer 2017 and in East Asia in spring 2018 within the EMeRGe (Effect of Megacities on the Transport and Transformation of Pollutants on the Regional to Global Scales) project by using the PeRCEAS instrument (Peroxy Radical Chemical Enhancement and Absorption Spectrometer), on board of the HALO research aircraft (www.halo.dlr.de).</p><p>Over the course of both measurement campaigns different MPC outflows were investigated including among others, London, Rome, Manila and Taipei. Polluted air masses of different origin and composition were probed. Overall the peroxy radical mixing ratios were of the same order of magnitude in the air masses probed in Europe and in East Asia. The variations in the photochemical activity were studied by taking into account simultaneous observations of radical precursors and photolysis rates, while applying known oxidation mechanisms. Radical precursors, photolysis rates and aerosol load were generally higher in Asia, which might indicate higher radical loss reactions on the aerosol surface than in Europe. Moreover this study shows a clear deviation in the photostationary state for MPC outflows close to the emission sources. Based on this information, this presentation will focus on the actual understanding of the photochemical processing in the probed air masses.</p>
000890289 536__ $$0G:(DE-HGF)POF3-243$$a243 - Tropospheric trace substances and their transformation processes (POF3-243)$$cPOF3-243$$fPOF III$$x0
000890289 588__ $$aDataset connected to CrossRef
000890289 7001_ $$0P:(DE-HGF)0$$aAndrés Hernández, Maria Dolores$$b1
000890289 7001_ $$0P:(DE-HGF)0$$aLiu, Yangzhuoran$$b2
000890289 7001_ $$0P:(DE-HGF)0$$aNenakhov, Vladyslav$$b3
000890289 7001_ $$00000-0003-1547-8130$$aPhilip Burrows, John$$b4
000890289 7001_ $$0P:(DE-Juel1)2693$$aBohn, Birger$$b5
000890289 7001_ $$0P:(DE-HGF)0$$aFörster, Eric$$b6
000890289 7001_ $$0P:(DE-HGF)0$$aZahn, Andreas$$b7
000890289 7001_ $$0P:(DE-HGF)0$$aSchlager, Hans$$b8
000890289 7001_ $$00000-0001-5483-5669$$aZiereis, Helmut$$b9
000890289 7001_ $$0P:(DE-HGF)0$$aSchreiner, Benjamin$$b10
000890289 7001_ $$00000-0002-7851-6029$$aPfeilsticker, Klaus$$b11
000890289 773__ $$a10.5194/egusphere-egu2020-18635
000890289 909CO $$ooai:juser.fz-juelich.de:890289$$pVDB
000890289 9141_ $$y2020
000890289 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)2693$$aForschungszentrum Jülich$$b5$$kFZJ
000890289 9131_ $$0G:(DE-HGF)POF3-243$$1G:(DE-HGF)POF3-240$$2G:(DE-HGF)POF3-200$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$aDE-HGF$$bErde und Umwelt$$lAtmosphäre und Klima$$vTropospheric trace substances and their transformation processes$$x0
000890289 9201_ $$0I:(DE-Juel1)IEK-8-20101013$$kIEK-8$$lTroposphäre$$x0
000890289 980__ $$aconf
000890289 980__ $$aVDB
000890289 980__ $$aI:(DE-Juel1)IEK-8-20101013
000890289 980__ $$aUNRESTRICTED
000890289 981__ $$aI:(DE-Juel1)ICE-3-20101013