Comparison of aircraft measurements during GoAmazon2014/5 and ACRIDICON-CHUVA

Mei, Fan; Wang, Jian; Comstock, Jennifer M.; Weigel, Ralf; Krämer, Martina; Mahnke, Christoph; Shilling, John E.; Schneider, Johannes; Schulz, Christiane; Long, Charles N.; Wendisch, Manfred; Machado, Luiz A.  T.; Schmid, Beat; Krisna, Trismono; Pekour, Mikhail; Hubbe, John; Giez, Andreas; Weinzierl, Bernadett; Zoeger, Martin; Pöhlker, Mira L.; Schlager, Hans; Cecchini, Micael A.; Andreae, Meinrat O.; Martin, Scot T.; de Sá, Suzane S.; Fan, Jiwen; Tomlinson, Jason; Springston, Stephen; Pöschl, Ulrich; Artaxo, Paulo; Pöhlker, Christopher; Klimach, Thomas; Minikin, Andreas; Afchine, Armin; Borrmann, Stephan

doi:10.5194/amt-13-661-2020

Title: Comparison of aircraft measurements during GoAmazon2014/5 and ACRIDICON-CHUVA

Journal Article · Tue Feb 11 00:00:00 EST 2020 · Atmospheric Measurement Techniques (Online)

DOI:https://doi.org/10.5194/amt-13-661-2020· OSTI ID:1599852

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Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States); Washington Univ., St. Louis, MO (United States). Dept. of Energy, Environmental and Chemical Engineering, Aerosol and Air Quality Research Lab.
Johannes Gutenberg Univ., Mainz (Germany)
Johannes Gutenberg Univ., Mainz (Germany); Research Centre Jülich (Germany). Inst. for Energy and Climate Research
Johannes Gutenberg Univ., Mainz (Germany); Max Planck Inst. for Chemistry, Mainz (Germany)
Max Planck Inst. for Chemistry, Mainz (Germany)
National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States)
Univ. of Leipzig (Germany)
National Inst. for Space Research (INPE), São Paulo (Brazil)
Deutsches Zentrum für Luft-und Raumfahrt (DLR), Oberpfaffenhofen (Germany)
Univ. of Vienna (Austria)
Univ. of Sao Paulo (Brazil)
Max Planck Inst. for Chemistry, Mainz (Germany); Univ. of California, San Diego, CA (United States). Scripps Inst. of Oceanography
Univ. of California, San Diego, CA (United States). Scripps Inst. of Oceanography
Brookhaven National Lab. (BNL), Upton, NY (United States)

The 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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Research Organization:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-76RL01830

OSTI ID:: 1599852

Report Number(s):: PNNL-SA-151169

Journal Information:: Atmospheric Measurement Techniques (Online), Vol. 13, Issue 2; ISSN 1867-8548

Publisher:: European Geosciences UnionCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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