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Does everyone know this one?<br>
<a class="moz-txt-link-freetext" href="http://www.airnow.gov">http://www.airnow.gov</a><br>
<blockquote type="cite">The air quality data used in these maps and
to generate forecasts are collected using either federal reference
or equivalent monitoring techniques or techniques approved by the
state, local or tribal monitoring agencies. Since the information
needed to make maps must be as "real-time" as possible, the data
are displayed as soon as practical after the end of each hour.
Although some preliminary data quality assessments are performed,
the data as such are not fully verified and validated through the
quality assurance procedures monitoring organizations use to
officially submit and certify data on the EPA AQS(Air Quality
System). Therefore, data are used on the AIRNow Web site only for
the purpose of reporting the AQI. Information on the AIRNow web
site is not used to formulate or support regulation, guidance or
any other Agency decision or position.</blockquote>
We're in the dog days of summer now. <a
href="http://www.airnow.gov/index.cfm?action=airnow.local_city&cityid=111"
class="NtnlSummaryCity">Fayetteville, NC</a> -- Yuck!<br>
<br>
I wasn't sure whether the map was from monitored or modeled data.
Sounds like it's monitored.<br>
The models (monitored data is only past-tense, you can only create a
forecast from a model) are amazingly<br>
accurate. At the UNC-A NEMAC <a class="moz-txt-link-freetext" href="http://nemac.unca.edu">http://nemac.unca.edu</a> I used to run
the Community Model for Air <br>
Quality (CMAQ). <a class="moz-txt-link-freetext" href="http://www.cmaq-model.org">http://www.cmaq-model.org</a> It is old. The new
version is called WRF-CHEM. CMAQ <br>
used MET as its meteorology input. WRF is the newer Meterology
model which is actually used by the NOAA-NWS to predict the
weather. CMAQ/WRF-CHEM adds atmospheric chemistry to the
Meteorology model. It consists of emission sources plus
light-driven reactions like NOX+Sunlight->O3<br>
<br>
<br>
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