Articles | Volume 13, issue 10
Atmos. Meas. Tech., 13, 5739–5761, 2020
https://doi.org/10.5194/amt-13-5739-2020
Atmos. Meas. Tech., 13, 5739–5761, 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 et al.

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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.