Urban Carbon Monoxide (CO) during the Global Economic Recession
Motivation: To determine whether a CO trend related to economic activity could be observed.
Examined July monthly averages from 2005 to 2012 for 10 urban areas.
Decrease going into 2008 or 2009 (worst years of the Recession).
Often another decrease into 2011.
Generally, rebound in 2012
Figure 1: AQS shows a sharp decrease in 2007 and 2008; Rebound in 2012