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Appears it's still primarily coming from gasoline exhaust - Pang et al., “Trends in selected ambient volatile organic compound (VOC)...
Yes, I saw that. Looks like SoCAB has about as high of biogenic NOx emission rate as the Imperial Valley though. NO2 itself isn't really a...
Apparently, there are high biogenic sources of NOx (agriculture) in Southern California. May explain the high satellite depiction of NOx in Bob's...
There was a study conducted a few years ago comparing PN emissions of two Toyota Camrys, one a conventional Camry, the other a Camry Hybrid -...
Bob, no I didn't see the full paper, but I saw a presentation of the paper. It's my understanding that the particle number (PN) was the metric...
I think you may be right!
I contacted the lead author of the ICCT/WVU report (Thompson). It was the report that prompted the investigation into VW (per the EPA NOV)....
Actually, I have, but it was about clarification of the percent of methane in the THC they measured. No one, including EPA, seems to be...
Yes, but as someone who supports diesel engine technology, I'm equally dismayed by all of the coverage of the diesel NOx emissions issue, but...
Apparently not. The EPA asked for additional data from Daimler several moths ago, but no NOV has been issued yet. VW emissions scandal: German...
I contacted the developer of the APEEP model (Muller) by email in January for further clarification of the NOx marginal damage map, specifically...
Thanks for putting that together. Could the high anomalies for San Francisco be the result of close wild fires? Not sure if the data are...
Have you see this graphic from EPA? [IMG] Nitrogen Dioxide Concentrations, Trends, Air Quality Analysis | Pacific Southwest | US EPA Looks...
I downloaded several of the ".do" and ".dat" files, but that model requires a program called "STATA" which has a nearly $1,000 per year...
Bob, If you click on the "AP2 Data Request Form" link, you can get access to several files (after free registration), including damage maps of...
Bob, it actually appears that areas west of the Rockies are less damaged by NOx emissions that just to the east, based on a well-respected damage...
One well-respected damage model (APEEP) actually assesses that NOx emissions are BENEFICIAL in two heavily populated counties in the U.S. (looks...
But NOx is just one of many pollutants produced by mobile sources. All other emissions besides NOx, e.g., VOC, CO, PM, PN, and most unregulated...
I agree that the primary effects of NH3 is from production of secondary PM, both nitrate and sulfate. However, the point is that controlling...
There's another interesting dilemma about NOx emissions that's seldom, if ever, mentioned. According to EPA itself, three-way catalysts on modern...
