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I agree, expect AR5 Final Draft also concludes that there's no clear trend in most forms of "extreme wx" (so far at least). This is my summary...
That's my understanding, but I worked at only one NWS office that was an upper air site (Brownsville, TX) in the mid-late 1990s. I know at that...
For what it's worth, near-surface absolute humidity has increased since the 1970s, but the moistening over land has abated during "recent years",...
That's the reason I used EPA as the data source. No caveats, no exclusions, just the average lifetime emission factors of all modern gasoline and...
But is it "skewing of data" to point out that EPA has lower lifetime average emissions factors in general for modern diesel passenger cars than...
Agree that diesels with DPF don't work well in true city driving. Constant-speed highway driving is more appropriate. However, DPF has been shown...
Here are some graphics which may clarify the particle emissions from the various gasoline and diesel engine technologies... This is a graphic of...
Agree, and the warm, sunny, dry weather is actually the main factor. It's usually accompanied by a subsidence inversion which would effectively...
From the linked paper... What are "associated gasolines (aquazole and diester 30%)"?
Thank you! This is more what I'm looking for.
Could be. The reason for my skepticism in automatically indicting diesels is that the same assumptions were made in the U.S. decades ago. I too...
Appreciate that, but I'm still looking for composition data of the PM10 and PM2.5. Here is a site I use for speciated PM data in the U.S.......
Yes, VOC tends to be associated with pre-combustion HC vapors. Evaporative gasoline vapors would also be an example of VOC. NMOG does include...
Thanks. It still doesn't look like it provides speciated data on the PM (at least not that I can find).
HC is essentially a subset of VOC. Both are gases/vapors. HC = hydrocarbons VOC = volatile organic compounds (e.g., hydrocarbons, alcohols,...
I've been trying to locate a site which provides speciated PM data in Europe, but haven't found anything yet. Do you know of one GC? Since...
This is exactly why I don't like the term "smog". It's too ambiguous. Photo-chemical "smog" is mainly a result of high ambient ozone...
It should be noted that in the U.S., the EPA's average lifetime emission factors used in its MOVES mobile emissions model is lower...
Regarding the air quality episode in Paris, a complete air monitoring profile would be needed to attribute the AQ problems to any particular...
Rob, Thank you for your post. Very informative. One comment about the graphic you included. I have a hypothesis that biogenic VOCs are...
