Articles | Volume 14, issue 7
https://doi.org/10.5194/amt-14-5049-2021
https://doi.org/10.5194/amt-14-5049-2021
Research article
 | 
27 Jul 2021
Research article |  | 27 Jul 2021

Ethane measurement by Picarro CRDS G2201-i in laboratory and field conditions: potential and limitations

Sara M. Defratyka, Jean-Daniel Paris, Camille Yver-Kwok, Daniel Loeb, James France, Jon Helmore, Nigel Yarrow, Valérie Gros, and Philippe Bousquet

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Short summary
We consider the possibility of using the CRDS Picarro G2201-i instrument, originally designed for isotopic CH4 and CO2, for measurements of ethane : methane in near-source conditions. The work involved laboratory tests, a controlled release experiment and mobile measurements. We show the potential of determining ethane : methane with 50 ppb ethane uncertainty. The instrument can correctly estimate the ratio in CH4 enhancements of 1 ppm and more, as can be found at strongly emitting sites.