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000884279 1001_ $$00000-0003-4285-2749$$aMei, Fan$$b0$$eCorresponding author
000884279 245__ $$aComparison of aircraft measurements during GoAmazon2014/5 and ACRIDICON-CHUVA
000884279 260__ $$aKatlenburg-Lindau$$bCopernicus$$c2020
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000884279 520__ $$aThe indirect effect of atmospheric aerosol particles on the Earth's radiation balance remains one of the most uncertain components affecting climate change throughout the industrial period. The large uncertainty is partly due to the incomplete understanding of aerosol–cloud interactions. One objective of the GoAmazon2014/5 and the ACRIDICON (Aerosol, Cloud, Precipitation, and Radiation Interactions and Dynamics of Convective Cloud Systems)-CHUVA (Cloud Processes of the Main Precipitation Systems in Brazil) projects was to understand the influence of emissions from the tropical megacity of Manaus (Brazil) on the surrounding atmospheric environment of the rainforest and to investigate its role in the life cycle of convective clouds. During one of the intensive observation periods (IOPs) in the dry season from 1 September to 10 October 2014, comprehensive measurements of trace gases and aerosol properties were carried out at several ground sites. In a coordinated way, the advanced suites of sophisticated in situ instruments were deployed aboard both the US Department of Energy Gulfstream-1 (G1) aircraft and the German High Altitude and Long-Range Research Aircraft (HALO) during three coordinated flights on 9 and 21 September and 1 October. Here, we report on the comparison of measurements collected by the two aircraft during these three flights. Such comparisons are challenging but essential for assessing the data quality from the individual platforms and quantifying their uncertainty sources. Similar instruments mounted on the G1 and HALO collected vertical profile measurements of aerosol particle number concentrations and size distribution, cloud condensation nuclei concentrations, ozone and carbon monoxide mixing ratios, cloud droplet size distributions, and downward solar irradiance. We find that the above measurements from the two aircraft agreed within the measurement uncertainties. The relative fraction of the aerosol chemical composition measured by instruments on HALO agreed with the corresponding G1 data, although the total mass loadings only have a good agreement at high altitudes. Furthermore, possible causes of the discrepancies between measurements on the G1 and HALO are examined in this paper. Based on these results, criteria for meaningful aircraft measurement comparisons are discussed.
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000884279 7001_ $$0P:(DE-HGF)0$$aWang, Jian$$b1
000884279 7001_ $$00000-0002-4183-7355$$aComstock, Jennifer M.$$b2
000884279 7001_ $$00000-0003-1316-0292$$aWeigel, Ralf$$b3
000884279 7001_ $$0P:(DE-Juel1)129131$$aKrämer, Martina$$b4
000884279 7001_ $$0P:(DE-Juel1)184748$$aMahnke, Christoph$$b5$$ufzj
000884279 7001_ $$00000-0002-3728-0195$$aShilling, John E.$$b6
000884279 7001_ $$0P:(DE-HGF)0$$aSchneider, Johannes$$b7
000884279 7001_ $$00000-0003-4413-8266$$aSchulz, Christiane$$b8
000884279 7001_ $$0P:(DE-HGF)0$$aLong, Charles N.$$b9
000884279 7001_ $$00000-0002-4652-5561$$aWendisch, Manfred$$b10
000884279 7001_ $$00000-0002-8243-1706$$aMachado, Luiz A. T.$$b11
000884279 7001_ $$0P:(DE-HGF)0$$aSchmid, Beat$$b12
000884279 7001_ $$00000-0002-1501-7468$$aKrisna, Trismono$$b13
000884279 7001_ $$00000-0002-9821-0078$$aPekour, Mikhail$$b14
000884279 7001_ $$0P:(DE-HGF)0$$aHubbe, John$$b15
000884279 7001_ $$0P:(DE-HGF)0$$aGiez, Andreas$$b16
000884279 7001_ $$00000-0003-4555-5686$$aWeinzierl, Bernadett$$b17
000884279 7001_ $$00000-0001-8291-345X$$aZoeger, Martin$$b18
000884279 7001_ $$0P:(DE-HGF)0$$aPöhlker, Mira L.$$b19
000884279 7001_ $$0P:(DE-HGF)0$$aSchlager, Hans$$b20
000884279 7001_ $$00000-0002-0219-2857$$aCecchini, Micael A.$$b21
000884279 7001_ $$00000-0003-1968-7925$$aAndreae, Meinrat O.$$b22
000884279 7001_ $$0P:(DE-HGF)0$$aMartin, Scot T.$$b23
000884279 7001_ $$0P:(DE-HGF)0$$ade Sá, Suzane S.$$b24
000884279 7001_ $$0P:(DE-HGF)0$$aFan, Jiwen$$b25
000884279 7001_ $$0P:(DE-HGF)0$$aTomlinson, Jason$$b26
000884279 7001_ $$00000-0003-0159-4931$$aSpringston, Stephen$$b27
000884279 7001_ $$00000-0003-1412-3557$$aPöschl, Ulrich$$b28
000884279 7001_ $$00000-0001-7754-3036$$aArtaxo, Paulo$$b29
000884279 7001_ $$00000-0001-6958-425X$$aPöhlker, Christopher$$b30
000884279 7001_ $$0P:(DE-HGF)0$$aKlimach, Thomas$$b31
000884279 7001_ $$00000-0003-0999-4657$$aMinikin, Andreas$$b32
000884279 7001_ $$0P:(DE-Juel1)129108$$aAfchine, Armin$$b33
000884279 7001_ $$00000-0002-4774-9380$$aBorrmann, Stephan$$b34
000884279 773__ $$0PERI:(DE-600)2505596-3$$a10.5194/amt-13-661-2020$$gVol. 13, no. 2, p. 661 - 684$$n2$$p661 - 684$$tAtmospheric measurement techniques$$v13$$x1867-8548$$y2020
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