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

Weigel, Ralf; Mahnke, Christoph; Baumgartner, Manuel; Dragoneas, Antonis; Vogel, Bärbel; Ploeger, Felix; Viciani, Silvia; D'Amato, Francesco; Bucci, Silvia; Legras, Bernard; Luo, Beiping; Borrmann, Stephan

doi:https://doi.org/10.5194/acp-21-11689-2021

Articles | Volume 21, issue 15

Atmos. Chem. Phys., 21, 11689–11722, 2021

https://doi.org/10.5194/acp-21-11689-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

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

Atmos. Chem. Phys., 21, 11689–11722, 2021

https://doi.org/10.5194/acp-21-11689-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 15

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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Month	HTML	PDF	XML	Total
Dec 2020	44	12	0	56
Jan 2021	26	13	1	40
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Mar 2021	64	21	0	85
Apr 2021	21	17	0	38
May 2021	26	12	1	39
Jun 2021	27	15	0	42
Jul 2021	22	19	0	41
Aug 2021	354	98	4	456
Sep 2021	113	48	1	162
Oct 2021	100	61	0	161
Nov 2021	86	49	0	135
Dec 2021	67	32	1	100
Jan 2022	24	22	1	47
Feb 2022	26	9	1	36
Mar 2022	24	13	0	37
Apr 2022	13	23	1	37
May 2022	15	10	0	25

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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.

Article

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

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