Articles | Volume 20, issue 14
Research article
22 Jul 2020
Research article |  | 22 Jul 2020

Particle number concentrations and size distribution in a polluted megacity: the Delhi Aerosol Supersite study

Shahzad Gani, Sahil Bhandari, Kanan Patel, Sarah Seraj, Prashant Soni, Zainab Arub, Gazala Habib, Lea Hildebrandt Ruiz, and Joshua S. Apte


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Joshua Apte on behalf of the Authors (25 May 2020)  Author's response    Manuscript
ED: Publish as is (08 Jun 2020) by Veli-Matti Kerminen
Short summary
Delhi, India, has had the highest fine particle mass (PM2.5; diameter < 2.5 µm) concentrations of any megacity on the planet in recent years. Here, we undertook a year of detailed measurements of particle size distributions. We observed that the number count of ultrafine particles (diameter < 100 nm) – unlike PM2.5 – is not dramatically elevated in Delhi. Using observations and a simple model, we illustrate how the high amount of PM2.5 in Delhi may suppress ultrafine particle concentrations.
Final-revised paper