Articles | Volume 13, issue 10
https://doi.org/10.5194/amt-13-5739-2020
https://doi.org/10.5194/amt-13-5739-2020
Research article
 | 
29 Oct 2020
Research article |  | 29 Oct 2020

Measurement of NOx and NOy with a thermal dissociation cavity ring-down spectrometer (TD-CRDS): instrument characterisation and first deployment

Nils Friedrich, Ivan Tadic, Jan Schuladen, James Brooks, Eoghan Darbyshire, Frank Drewnick, Horst Fischer, Jos Lelieveld, and John N. Crowley

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Latest update: 14 Jun 2024
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Short summary
We present a new instrument for the measurement of NOx and NOy based on a combination of the thermal dissociation of NOy to NOx and cavity ring-down spectroscopic detection of NO2. It features a denuder to separate the contributions of gas-phase and particulate nitrates to NOy. We provide a detailed characterization of the instrument and briefly outline results from first deployments.