Publication Date:
2019-07-13
Description:
The oxidizing capacity of the troposphere is controlled, to a large extent, by the abundance of hydroxyl radical (OH). The global mean concentration of OH, [OH]GLOBAL, inferred from measurements of methyl chloroform, has remained relatively constant during the past several decades, despite rising levels of CH4 that should have led to a steady decline. Here we examine other factors that may have affected [OH]GLOBAL, such as the overhead burden of stratospheric O3 and tropospheric H2O, using global OH fields from the GEOS-CHEM Chemistry-Climate Model. Our analysis suggests these factors may have contributed a positive trend to [OH]GLOBAL large enough to counter the decrease due to CH4.
Keywords:
Geosciences (General)
Type:
GSFC-E-DAA-TN7305
,
AGU 2012 Fall Meeting; Dec 03, 2012 - Dec 07, 2012; San Francisco, CA; United States
Format:
application/pdf
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