Halocarbon concentration patterns associated with frontal passages
Carter [Michael W.] ; Cronn [Dagmar R.] ; Bamesberger [W. Lee] ; Robinson [Elmer]
Année de publication
1983
The atmospheric mixing ratios of CCl2F2 (F-12) and CCl3F (F-11) increase abruptly up to 14 ppt (F-12) and 8 ppt (F-11) after strong cold fronts pass and decrease abruptly after warm fronts pass at a semi-continuous monitoring station near Pullman, Washington (46°42′N, 117°10′W). We conclude that air masses from higher latitudes (>60°N) can have F-12 and/or F-11 concentrations as much as 5% higher than mid-latitude air masses. Conversely, nitrous oxide shows no significant changes during frontal passages and is uniformly distributed between air masses.
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