NASA Jet Propulsion Laboratory California Institute of Technology Follow this link to skip to the main content

BEACON eSpace at Jet Propulsion Laboratory >
JPL Technical Report Server >
JPL TRS 1992+ >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2014/40921

Title: Nighttime OClO in the winter Arctic vortex
Authors: Canty, T.
Riviere, E. D.
Salawitch, R. J.
Berthet, G.
Renard, J.-B.
Pfeilsticker, K.
Dorf, M.
Butz, A.
Bosch, H.
Stimpfle, R. M.
Wilmouth, D. M.
Richard, E. C.
Fahey, D. W.
Popp, P. J.
Schoeberl, M. R.
Lait, L. R.
Bui, T. P.
Keywords: Arctic vortex
ozone depletion
chlorine activation
Issue Date: 4-Jan-2005
Publisher: the American Geophysical Union
Citation: Journal Of Geophysical Research, Vol. 110, D01301, doi:10.1029/2004JD005035, 2005
Abstract: We show that a nighttime profile of OClO in the Arctic vortex during the winter of 2000 is overestimated, by nearly a factor of 2, using an isentropic trajectory model constrained by observed profiles of ClOx (ClO + 2 X ClOOCl) and BrO. Calculated abundances of nighttime OClO are shown to be sensitive to the abundance of BrOx (BrO + BrCl), details of the air parcel history during the most recent sunrise/sunset transitions, and the BrCl yield from the reaction BrO + ClO. Many uncertainties are considered, and the discrepancy between measured and modeled nighttime OClO appears to be robust. This discrepancy suggests that production of OClO occurs more slowly than implied by standard photochemistry. If the yield of BrCl from the reaction of BrO + ClO is increased from 7% (JPL 2002 value) to 11% (near the upper limit of the uncertainty), good agreement is found between measured and modeled nighttime OClO. This study highlights the importance of accurate knowledge of BrO + ClO reaction kinetics as well as air parcel trajectories for proper interpretation of nighttime OClO. These factors have a considerably smaller impact on the interpretation of OClO observations obtained during twilight (90° ≤SZA ≤ 92°), when photolytic processes are still active.
URI: http://hdl.handle.net/2014/40921
Appears in Collections:JPL TRS 1992+

Files in This Item:

File Description SizeFormat
04-2728.pdf294.81 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, but are furnished with U.S. government purpose use rights.

 

Privacy/Copyright Image Policy Beacon Home Contact Us
NASA Home Page + Div 27
+ JPL Space
Site last updated on December 5, 2014.
If you have any comments or suggestions for this web site, please e-mail Robert Powers.