Computer Science – Sound
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3323812f&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 23, CiteID L23812
Computer Science
Sound
19
Atmospheric Composition And Structure: Evolution Of The Atmosphere (1610, 8125), Atmospheric Composition And Structure: Middle Atmosphere: Composition And Chemistry, Atmospheric Composition And Structure: Middle Atmosphere: Constituent Transport And Chemistry (3334)
Scientific paper
We report a steady decrease in the upper stratospheric and lower mesospheric abundances of hydrogen chloride (HCl) from August 2004 through January 2006, as measured by the Microwave Limb Sounder (MLS) aboard the Aura satellite. For 60°S to 60°N zonal means, the average yearly change in the 0.7 to 0.1 hPa (~50 to 65 km) region is -27 +/- 3 pptv/year, or -0.78 +/- 0.08 percent/year. This is consistent with surface abundance decrease rates (about 6 to 7 years earlier) in chlorine source gases. The MLS data confirm that international agreements to reduce global emissions of ozone-depleting industrial gases are leading to global decreases in the total gaseous chlorine burden. Tracking stratospheric HCl variations on a seasonal basis is now possible with MLS data. Inferred stratospheric total chlorine (ClTOT) has a value of 3.60 ppbv at the beginning of 2006, with a (2-sigma) accuracy estimate of 7% the stratospheric chlorine loading has decreased by about 43 pptv in the 18-month period studied here. We discuss the MLS HCl measurements in the context of other satellite-based HCl data, as well as expectations from surface chlorine data. A mean age of air of ~ 5.5 years and an age spectrum width of 2 years or less provide a fairly good fit to the ensemble of measurements.
Bernath Peter
Boone Carl
Cunnold Derek
Drouin B.
Elkins J.
No associations
LandOfFree
Temporal decrease in upper atmospheric chlorine does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Temporal decrease in upper atmospheric chlorine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temporal decrease in upper atmospheric chlorine will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1544894