Overview of VOC emissions and chemistry from PTR-TOF-MS measurements  during the SusKat-ABC campaign: high acetaldehyde, isoprene and isocyanic acid in wintertime air of the Kathmandu Valley

Sarkar, Chinmoy; Sinha, Vinayak; Kumar, Vinod; Rupakheti, Maheswar; Panday, Arnico; Mahata, Khadak S.; Rupakheti, Dipesh; Kathayat, Bhogendra; Lawrence, Mark G.

doi:10.5194/acp-16-3979-2016

Articles | Volume 16, issue 6

https://doi.org/10.5194/acp-16-3979-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Atmospheric pollution in the Himalayan foothills: The SusKat-ABC...

https://doi.org/10.5194/acp-16-3979-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 16, issue 6

Research article

|

24 Mar 2016

Research article |

| 24 Mar 2016

Overview of VOC emissions and chemistry from PTR-TOF-MS measurements during the SusKat-ABC campaign: high acetaldehyde, isoprene and isocyanic acid in wintertime air of the Kathmandu Valley

Chinmoy Sarkar, Vinayak Sinha, Vinod Kumar, Maheswar Rupakheti, Arnico Panday, Khadak S. Mahata, Dipesh Rupakheti, Bhogendra Kathayat, and Mark G. Lawrence

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Cumulative views and downloads (calculated since 15 Sep 2015)

Month	HTML	PDF	XML	Total
Sep 2015	209	98	5	312
Oct 2015	49	60	9	118
Nov 2015	33	61	10	104
Dec 2015	19	54	7	80
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Jun 2016	37	21	3	61
Jul 2016	24	15	3	42
Aug 2016	33	17	0	50
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Aug 2025	58	40	1	99
Sep 2025	72	21	2	95
Oct 2025	21	40	0	61
Nov 2025	34	20	4	58

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Short summary

First deployment of PTR-TOF-MS in South Asia. High acetaldehyde and biogenic isoprene concentrations detected even in winter in the Kathmandu Valley. Isocyanic acid, formamide, acetamide, naphthalene and nitromethane were detected for the first time in South Asian air. Oxygenated VOCs and isoprene-dominated OH reactivity and ozone production potentials (> 68 % OPP). Regulation of emissions from biomass co-fired brick kilns' by cleaner technology would improve air quality of the valley.