Articles | Volume 21, issue 15
Atmos. Chem. Phys., 21, 11689–11722, 2021
https://doi.org/10.5194/acp-21-11689-2021

Special issue: StratoClim stratospheric and upper tropospheric processes...

Atmos. Chem. Phys., 21, 11689–11722, 2021
https://doi.org/10.5194/acp-21-11689-2021

Research article 06 Aug 2021

Research article | 06 Aug 2021

In situ observation of new particle formation (NPF) in the tropical tropopause layer of the 2017 Asian monsoon anticyclone – Part 1: Summary of StratoClim results

Ralf Weigel et al.

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Ralf Weigel on behalf of the Authors (16 Jun 2021)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (17 Jun 2021) by Martina Krämer
RR by Anonymous Referee #2 (29 Jun 2021)
ED: Publish as is (06 Jul 2021) by Martina Krämer
Short summary
In July and August 2017, eight StratoClim mission flights of the Geophysica reached up to 20 km in the Asian monsoon anticyclone. New particle formation (NPF) was identified in situ by abundant nucleation-mode aerosols (6–15 nm in diameter) with mixing ratios of up to 50 000 mg−1. NPF occurred most frequently at 12–16 km with fractions of non-volatile residues of down to 15 %. Abundance and productivity of observed NPF indicate its ability to promote the Asian tropopause aerosol layer.
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