Partitioning between the inorganic chlorine reservoirs HCl and ClONO 2 during the Arctic winter 2005 from the ACE-FTS

• Published in: Atmospheric Chemistry and Physics
• Main Authors: Dufour, G., Nassar, R., Boone, C. D., Skelton, R., Walker, K. A., Bernath, P. F., Rinsland, C. P., Semeniuk, K., Jin, J. J., Mcconnell, J. C., Manney, G. L.
• Other Authors: Department of Chemistry, NASA Headquarters, Department of Space Science and Engineering Toronto, York University Toronto, Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), New Mexico Institute of Mining and Technology New Mexico Tech (NMT)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2006
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; Arctic
• Online Access: https://hal.science/hal-00295951; https://hal.science/hal-00295951/document; https://hal.science/hal-00295951/file/acp-6-2355-2006.pdf; https://doi.org/10.5194/acp-6-2355-2006

International audience From January to March 2005, the Atmospheric Chemistry Experiment high resolution Fourier transform spectrometer (ACE-FTS) on SCISAT-1 measured many of the changes occurring in the Arctic (50?80° N) lower stratosphere under very cold winter conditions. Here we focus on the partitioning between the inorganic chlorine reservoirs HCl and ClONO 2 and their activation into ClO. The simultaneous measurement of these species by the ACE-FTS provides the data needed to follow chlorine activation during the Arctic winter and the recovery of the Cl-reservoir species ClONO 2 and HCl. The time evolution of HCl, ClONO 2 and ClO as well as the partitioning between the two reservoir molecules agrees well with previous observations and with our current understanding of chlorine activation during Arctic winter. The results of a chemical box model are also compared with the ACE-FTS measurements and are generally consistent with the measurements.