The evolution of CLO and NO along air parcel trajectories

M. R. Schoeberl, A. R. Douglass, R. S. Stolarski, P. A. Newman, L. R. Lait, D. Toohey, L. Avallone, J. G. Anderson, William Henry Brune, D. W. Fahey, K. Kelly

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Back trajectory analysis of Arctic and Antarctic aircraft data reveals that high ClO concentrations are associated with predicted polar stratospheric cloud (PSCs) encounters. The ClO concentrations within the Arctic and Antarctic polar vortices vary widely but appear to be inversely related to parcel solar exposure since the last PSC interaction. These results imply that production of NOx from HNO3 photolysis and reaction with OH is the mechanism, for the loss of chlorine radicals through the reformation of chlorine nitrate. Highly denitrified air parcels show no change in ClO with solar exposure. The recovery process is quantitatively duplicated using a model of chemistry along trajectories. Although PSC processing is the primary mechanism for producing elevated ClO amounts, back trajectories apparently unperturbed by PSC's also show slightly elevated ClO levels in 1992 compared to Arctic 1989 and Antarctic 1987 measurements presumably due to the presence of Pinatubo aerosol.

Original languageEnglish (US)
Pages (from-to)2511-2514
Number of pages4
JournalGeophysical Research Letters
Volume20
Issue number22
DOIs
StatePublished - Jan 1 1993

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polar stratospheric cloud
trajectory
trajectories
chlorine
air
chlorine nitrate
trajectory analysis
polar vortex
photolysis
encounters
aircraft
nitrates
aerosols
recovery
vortices
chemistry
aerosol
interactions
exposure

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Schoeberl, M. R., Douglass, A. R., Stolarski, R. S., Newman, P. A., Lait, L. R., Toohey, D., ... Kelly, K. (1993). The evolution of CLO and NO along air parcel trajectories. Geophysical Research Letters, 20(22), 2511-2514. https://doi.org/10.1029/93GL01690
Schoeberl, M. R. ; Douglass, A. R. ; Stolarski, R. S. ; Newman, P. A. ; Lait, L. R. ; Toohey, D. ; Avallone, L. ; Anderson, J. G. ; Brune, William Henry ; Fahey, D. W. ; Kelly, K. / The evolution of CLO and NO along air parcel trajectories. In: Geophysical Research Letters. 1993 ; Vol. 20, No. 22. pp. 2511-2514.
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Schoeberl, MR, Douglass, AR, Stolarski, RS, Newman, PA, Lait, LR, Toohey, D, Avallone, L, Anderson, JG, Brune, WH, Fahey, DW & Kelly, K 1993, 'The evolution of CLO and NO along air parcel trajectories', Geophysical Research Letters, vol. 20, no. 22, pp. 2511-2514. https://doi.org/10.1029/93GL01690

The evolution of CLO and NO along air parcel trajectories. / Schoeberl, M. R.; Douglass, A. R.; Stolarski, R. S.; Newman, P. A.; Lait, L. R.; Toohey, D.; Avallone, L.; Anderson, J. G.; Brune, William Henry; Fahey, D. W.; Kelly, K.

In: Geophysical Research Letters, Vol. 20, No. 22, 01.01.1993, p. 2511-2514.

Research output: Contribution to journalArticle

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Schoeberl MR, Douglass AR, Stolarski RS, Newman PA, Lait LR, Toohey D et al. The evolution of CLO and NO along air parcel trajectories. Geophysical Research Letters. 1993 Jan 1;20(22):2511-2514. https://doi.org/10.1029/93GL01690