Premium
Measurements of stratospheric ClO over Antarctica in 1996–2000 and implications for ClO dimer chemistry
Author(s) -
Solomon Philip,
Connor Brian,
Barrett James,
Mooney Thomas,
Lee Adrian,
Parrish Alan
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl015232
Subject(s) - dimer , stratosphere , photodissociation , mixing ratio , atmospheric chemistry , ozone , atmospheric sciences , ozone depletion , drop (telecommunication) , environmental science , meteorology , chemistry , analytical chemistry (journal) , physics , photochemistry , environmental chemistry , organic chemistry , telecommunications , computer science
Measurements of ClO over Antarctica during the 1996 to 2000 ozone holes are compared with predictions of the SLIMCAT model. The model captures all of the major features of the measurements, including the rapid rise in August, the drop in mid or late September due to the arrival of warmer, ClO x poor air overhead, and the deactivation of ClO x into the reservoir species, HCl and ClONO 2 in the ozone poor air. The model uses the standard JPL rates for the photolysis of the ClO dimer ( j ) and for the forward reaction forming the dimer ( k f ). The predicted ClO mixing ratios and columns are in excellent agreement with the measurements. A comparison of the model and data for all 5 years leads to a value of the ratio ( j / k f ) consistent with the standard value, namely 1.06 ± 0.30( j / k f ) JPL .