tag:blogger.com,1999:blog-6168620747792092240.post4659199758367877517..comments2024-03-27T15:09:59.039-06:00Comments on Wasatch Weather Weenies: Above My Pay GradeJim Shttp://www.blogger.com/profile/15799757451626876963noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-6168620747792092240.post-89153347821870213412016-02-13T08:08:25.538-07:002016-02-13T08:08:25.538-07:00As someone who is not a Weather Weenie and knows n...As someone who is not a Weather Weenie and knows nearly nothing about air monitoring I find it concerning that during this inversion the sole station (DAQ Hawthorne) reported on by the media and apparently used by schools for recess cancellation has consistently had values far below the Trax line, Neil Armstrong Academy, and the University of Utah monitors. <br /><br />The DAQ web site states that the "data is not quality assured." Should we reasonably assume the DAQ Hawthorne monitor is accurate or at least more accurate a than the others? Should we be relying on this one monitor?<br /><br />According to the DAQ the air quality never approached the 90 ug/m3 need to trigger public school recess cancellation. If their data is not robust, it may matter not just for the potential health impacts of area children but also because multiple days of indoor recess might be a direct impact to a larger number of households and might make for a big news event, which might get the attention of Utah legislatures. Would the differences in reported data have been large enough to have an effect on individual actions and future policy or legislation? Would the differences in reported levels affected federal/EPA oversight?<br /><br />According to the Hawthorne site this pollution event abruptly ended in the wee hours of the morning. Has our air been clean for the last 7 hours? I look out the window and find that hard to swallow. This reduces my faith in the Hawthorne site or at least in its exclusive use by media and policy makers.<br /><br />QHW<br />2016-02-13 07:00 Local<br />0.10 ug/m3<br /><br />MTMET<br />2016-02-13 07:50 Local<br />93.00 ug/m3<br /><br />NAA<br />2016-02-13 07:55 Local<br />93.00 ug/m3Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6168620747792092240.post-74440574113475802016-02-11T17:00:11.838-07:002016-02-11T17:00:11.838-07:00Today's Tribune article is way understating th...Today's Tribune article is way understating the PM 2.5 levels:<br /><br />Utah's bad air is the worst it's been in years -- and it's likely to stick around - http://www.sltrib.com/news/3524088-155/utahs-bad-air-is-the-worstKurthttps://www.blogger.com/profile/08262008007311658043noreply@blogger.comtag:blogger.com,1999:blog-6168620747792092240.post-36007006928604790442016-02-11T17:00:00.924-07:002016-02-11T17:00:00.924-07:00Today's Tribune article is way understating th...Today's Tribune article is way understating the PM 2.5 levels:<br /><br />Utah's bad air is the worst it's been in years -- and it's likely to stick around - http://www.sltrib.com/news/3524088-155/utahs-bad-air-is-the-worstKurthttps://www.blogger.com/profile/08262008007311658043noreply@blogger.comtag:blogger.com,1999:blog-6168620747792092240.post-29252079844119130452016-02-11T16:57:19.989-07:002016-02-11T16:57:19.989-07:00This comment has been removed by the author.Kurthttps://www.blogger.com/profile/08262008007311658043noreply@blogger.comtag:blogger.com,1999:blog-6168620747792092240.post-77894307596410787852016-02-11T08:11:43.887-07:002016-02-11T08:11:43.887-07:00With regards to the humidity comments, the discrep...With regards to the humidity comments, the discrepancy begins to show up overnight and, at least yesterday, maximized around noon. The humidity in the afternoon on prior days was dipping down to 70% or lower, sometimes for a few hours. There was only a very brief drop to 70% yesterday afternoon (roughly during the PM2.5 drop in the NAA graph above - extreme right of the graph), but otherwise it was 90% or higher for most of the day. Thus, my take is this is still in play.<br /><br />I picked NAA, but this discrepancy is evident relative to all U of U sensors, including the one on the Trax line closer to Hawthorne. I picked NAA for convenience. Jim Shttps://www.blogger.com/profile/15799757451626876963noreply@blogger.comtag:blogger.com,1999:blog-6168620747792092240.post-62704414598940736412016-02-11T07:53:29.624-07:002016-02-11T07:53:29.624-07:00This is interesting. A few thoughts:
- The trend...This is interesting. A few thoughts:<br /><br />- The trends between NAA and QHW are basically identical.<br /><br />- Highest humidity should have been at night and early AM. The discrepancy shows up in the afternoon. This goes against and idea that maybe the high humidity caused an instrument problem.<br /><br />- The two observing sites are not exactly close to each other. NAA is in West Valley while QHW is 700 East 1700 South. A little surprising to explain the difference soley on their locations, but much larger differences have been observed in our Valley. Yesterday was a day with eroding stratus. Perhaps this has something to do with it.<br /><br />- Two different instruments. Trend was the same but magnitudes will be different simply because the two instruments are different. Big magnitude difference though.tcruickshttps://www.blogger.com/profile/06730530603038741779noreply@blogger.com