In situ observation of new particle formation (NPF) in the tropical tropopause layer of the 2017 Asian monsoon anticyclone – Part 2: NPF inside ice clouds

Weigel, Ralf; Mahnke, Christoph; Baumgartner, Manuel; Krämer, Martina; Spichtinger, Peter; Spelten, Nicole; Afchine, Armin; Rolf, Christian; Viciani, Silvia; D'Amato, Francesco; Tost, Holger; Borrmann, Stephan

doi:https://doi.org/10.5194/acp-21-13455-2021

Articles | Volume 21, issue 17

Atmos. Chem. Phys., 21, 13455–13481, 2021

https://doi.org/10.5194/acp-21-13455-2021

© 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, 13455–13481, 2021

https://doi.org/10.5194/acp-21-13455-2021

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

Articles | Volume 21, issue 17

Research article

10 Sep 2021

Research article | 10 Sep 2021

In situ observation of new particle formation (NPF) in the tropical tropopause layer of the 2017 Asian monsoon anticyclone – Part 2: NPF inside ice clouds

Ralf Weigel et al.

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Month	HTML	PDF	XML	Total
Jan 2021	115	48	2	165
Feb 2021	32	14	0	46
Mar 2021	58	22	6	86
Apr 2021	38	19	1	58
May 2021	41	16	2	59
Jun 2021	32	7	0	39
Jul 2021	38	11	1	50
Aug 2021	25	8	0	33
Sep 2021	239	61	6	306
Oct 2021	128	105	0	233
Nov 2021	89	70	0	159
Dec 2021	66	23	1	90
Jan 2022	24	21	0	45
Feb 2022	27	15	2	44
Mar 2022	14	12	0	26
Apr 2022	11	10	1	22
May 2022	12	5	0	17

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Short summary

In July and August 2017, the StratoClim mission took place in Nepal with eight flights of the M-55 Geophysica at up to 20 km in the Asian monsoon anticyclone. New particle formation (NPF) next to cloud ice was detected in situ by abundant nucleation-mode aerosols (> 6 nm) along with ice particles (> 3 µm). NPF was observed mainly below the tropopause, down to 15 % being non-volatile residues. Observed intra-cloud NPF indicates its importance for the composition in the tropical tropopause layer.

Article

In situ observation of new particle formation (NPF) in the tropical tropopause layer of the 2017 Asian monsoon anticyclone – Part 2: NPF inside ice clouds

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