Journal cover Journal topic
Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 3.400 IF 3.400
  • IF 5-year value: 3.841 IF 5-year
  • CiteScore value: 3.71 CiteScore
  • SNIP value: 1.472 SNIP 1.472
  • IPP value: 3.57 IPP 3.57
  • SJR value: 1.770 SJR 1.770
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 70 Scimago H
    index 70
  • h5-index value: 49 h5-index 49
Discussion papers
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 29 Apr 2019

Submitted as: research article | 29 Apr 2019

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Atmospheric Measurement Techniques (AMT).

Comparison of Aircraft Measurements during GoAmazon2014/5 and ACRIDICON-CHUVA

Fan Mei1, Jian Wang2, Jennifer M. Comstock1, Ralf Weigel13, Martina Krämer14, Christoph Mahnke13,8, John E. Shilling1, Johannes Schneider8, Charles N. Long7, Manfred Wendisch5, Luiz A. T. Machado3, Beat Schmid1, Trismono Krisna5, Mikhail Pekour1, John Hubbe1, Andreas Giez6, Bernadett Weinzierl6, Martin Zoeger6, Christiane Schulz8, Mira L. Pöhlker8, Hans Schlager6, Micael A. Cecchini9, Meinrat O. Andreae8,10, Scot T. Martin4, Suzane S. de Sa4, Jiwen Fan1, Jason Tomlinson1, Stephen Springston2, Ulrich Pöschl8, Paulo Artaxo11, Christopher Pöhlker8, Thomas Klimach8, Andreas Minikin12, Armin Afchine14, and Stephan Borrmann13,8 Fan Mei et al.
  • 1Pacific Northwest National Laboratory, Richland, WA, USA
  • 2Brookhaven National Laboratory, Upton, NY, USA
  • 3National Institute for Space Research (INPE), SãoPaulo, Brazil
  • 4Harvard University, Cambridge, MA, USA
  • 5University of Leipzig, Leipzig, Germany
  • 6Deutsches Zentrum für Luft-und Raumfahrt (DLR), Oberpfaffenhofen, Germany
  • 8Max Planck Institute for Chemistry, Mainz, Germany
  • 9University of São Paulo (USP), São Paulo, Brazil
  • 10Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, USA
  • 11Instituto de Física, Universidade de São Paulo, São Paulo, Brazil
  • 12DLR Oberpfaffenhofen, Flight Experiments Facility, Wessling, Germany
  • 13Institute for Physics of the Atmosphere, Johannes Gutenberg University, Mainz, Germany
  • 14Research Centre Jülich, Institute for Energy and Climate Research 7: Stratosphere (IEK-7), Jülich, Germany

Abstract. 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. This issue is partially a result of the incomplete understanding of aerosol-cloud interactions. One objective of the GoAmazon2014/5 and ACRIDICON-CHUVA projects was to improve the understanding of the influence of the emissions of 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 September 1 to October 10, 2014, comprehensive instrument suites collected data from several ground sites. In a coordinated way, the advanced suites of sophisticated instruments were deployed in situ both from the U.S. Department of Energy Gulfstream-1 (G1) aircraft and the German High Altitude and Long-Range Research Aircraft (HALO) during three coordinated flights on September 9, 21, and October 1. Here we report on the comparison of measurements collected by the two aircraft during these three flights. Such comparisons are difficult to obtain, but they are 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 particles number concentration and size distribution, cloud condensation nuclei concentration, ozone, and carbon monoxide concentration, cloud droplet size distribution, and downward solar irradiance. We find that the above measurements from the two aircraft agreed within the range given by the measurement uncertainties. Aerosol chemical composition measured by instruments on HALO agreed with the corresponding G1 data collected at high altitudes only. Furthermore, possible causes of discrepancies between the data sets collected by the G1 and HALO instrumentation are addressed in this paper. Based on these results, criteria for meaningful aircraft measurement comparisons are discussed.

Fan Mei et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Fan Mei et al.
Total article views: 558 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
433 123 2 558 24 4 1
  • HTML: 433
  • PDF: 123
  • XML: 2
  • Total: 558
  • Supplement: 24
  • BibTeX: 4
  • EndNote: 1
Views and downloads (calculated since 29 Apr 2019)
Cumulative views and downloads (calculated since 29 Apr 2019)
Viewed (geographical distribution)  
Total article views: 450 (including HTML, PDF, and XML) Thereof 450 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
No saved metrics found.
No discussed metrics found.
Latest update: 21 Oct 2019
Publications Copernicus
Short summary
In 2014, the U.S. DOE G1 aircraft and the German HALO aircraft overflew the Amazon basin to study how aerosols influence cloud cycles under the clean condition and around a tropical megacity. This manuscript describes how to meaningfully compare similar measurements from two research aircraft and identify the potential measurement issue. We also discuss the uncertainty range for each measurement for further usage in model evaluation and satellite data validation.
In 2014, the U.S. DOE G1 aircraft and the German HALO aircraft overflew the Amazon basin to...