[kepler-dev] Ozone warning current and warning levels

[Dan Higgins]

Bertram,

    Check out
http://www.arb.ca.gov/aqd/aqinfo.htm

for hourly info on ozone and other pollutants for various spots in Ca. 
PPM (or PPB - parts per billion) seems like a good unit to me. To 
convert to mass per unit volume, one needs the air density (which 
depends on pressure, temperature, water vapor, etc.).  So can a Kepler 
ontology figure all this out?!

(Or just give up the idea of jogging in Southern Califormia :-) )

Dan Higgins

Bertram Ludaescher wrote:

>Hi:
>
>On a sunny day like this I ask myself is it healthy to go for a jog or
>not (and I'm always looking for reasons not to ;-)
>
>Can someone tell me where I find the current ozone readings say for
>San Diego? Live data streams and all that jazz...
>
>For example, I found this:
>	http://www.sdapcd.co.san-diego.ca.us/air/data/8hour_web.txt
>
>First I note that 8h averages are of course a bit euphemistic: when I
>run for an hour and the peak is right then, I won't feel the effect of 
>an 8 hour average ;-)
>
>Also: What kind of strange unit is PPM? I guess parts per million. 
>But how do I compare this to the values that I find elsewhere, for
>example on several European pages I found "microgram / m^3". 
>How do I go from PPM to the latter??? Figure out the density, pressure 
>etc of air? The same for ozone? Man... complicated..
>
>Unit converters to the front!! Give us the equations!
>
>Bertram
>
>PS yes, that makes a nice Kepler workflow too: send me a message to my 
>cell phone when the 3 hour average lies above the "warning level". Of
>course the averaging should be done in Kepler... piece of cake...
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