The contributions of chemistry and transport to low arctic ozone in March 2011 derived from Aura MLS observations

  title={The contributions of chemistry and transport to low arctic ozone in March 2011 derived from Aura MLS observations},
  author={Susan E. Strahan and Anne R. Douglass and Paul A. Newman},
  journal={Journal of Geophysical Research: Atmospheres},
  pages={1563 - 1576}
Stratospheric and total columns of Arctic O3 (63–90oN) in late March 2011 averaged 320 and 349 DU, respectively, 50–100 DU lower than any of the previous 6 years. We use Aura Microwave Limb Sounder (MLS) O3 observations to quantify the roles of chemistry and transport and find there are two major reasons for low O3 in March 2011: heterogeneous chemical loss and a late final warming that delayed the resupply of O3 until April. Daily vortex‐averaged partial columns in the lowermost stratosphere… 

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