Articles | Volume 14, issue 5
Atmos. Meas. Tech., 14, 3217–3231, 2021
https://doi.org/10.5194/amt-14-3217-2021
Atmos. Meas. Tech., 14, 3217–3231, 2021
https://doi.org/10.5194/amt-14-3217-2021

Research article 03 May 2021

Research article | 03 May 2021

Intercomparison of thermal–optical carbon measurements by Sunset and Desert Research Institute (DRI) analyzers using the IMPROVE_A protocol

Xiaolu Zhang et al.

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Short summary
Three models of carbon analyzer were used in the past decade to measure carbonaceous particles from samples collected within the Chemical Speciation Network. This study compares results from these analyzer models to investigate the impact on long-term data from instrument differences. Good agreement was found among the three models for total carbon, organic carbon, and elemental carbon, while the reasons for and implications of some notable differences in their subtractions are investigated.