Windy Community

    • Register
    • Login
    • Search
    • Unread
    • Categories
    • Groups
    • Go to windy.com
    1. Home
    2. AirPollutant
    A
    • Profile
    • Following 0
    • Followers 0
    • Topics 1
    • Posts 3
    • Best 1
    • Controversial 0
    • Groups 0

    AirPollutant

    @AirPollutant

    1
    Reputation
    7
    Profile views
    3
    Posts
    0
    Followers
    0
    Following
    Joined Last Online

    AirPollutant Unfollow Follow

    Best posts made by AirPollutant

    • RE: Probably wrong units of SO2 concentration

      @idefix37 thank you! Your answers were helpful! I've googled more and found that this is not a trivial task to get ground concentrations from the satellite integral data. There are bunch of complex models and ways to do so. I wonder why the other pollutants are presented in micrograms per m3 and only the SO2 data is in 'unpractical' units. Wish you good luck!

      posted in Bug Reports
      A
      AirPollutant

    Latest posts made by AirPollutant

    • RE: Probably wrong units of SO2 concentration

      @idefix37 thank you! Your answers were helpful! I've googled more and found that this is not a trivial task to get ground concentrations from the satellite integral data. There are bunch of complex models and ways to do so. I wonder why the other pollutants are presented in micrograms per m3 and only the SO2 data is in 'unpractical' units. Wish you good luck!

      posted in Bug Reports
      A
      AirPollutant
    • RE: Probably wrong units of SO2 concentration

      @idefix37 oh, I'm sorry, my bad... Is it possible to convert this to micrograms per m^3 somehow? I tried to google this with no success. I tried to use the formula (Ideal gas law):

      pV=(m/M) RT like this:
      For example in Moscow was 10 milligrams per m2 today
      Temperature = 23 °C = 296 K
      V = 1 m3
      So p = 10e-6 * g = 10e-6 * 9,81 = 9,81e-5 Pa (partial pressure of SO2)
      Molar mass M of SO2 is 64e-3 kg per mole

      m = pM/(RT) = 9,81e-5 * 64e-3 / (8,31 * 296) = 2,6 micrograms per m^3

      But I'm not quite sure if this correct convertion. Russian state threshold limit value of SO2 is 50 micrograms per m3 - it is about 195 milligrams per m2 (by the formula above) in Shanghai is now more than 230 mg/m2
      Is this convertion correct? (seems legit, but...)

      Also I've found another 'bug' : when I flip my phone the value can change up to 10 times in the same area
      Screenshot_2020-08-23-11-45-23-770_com.windyty.android.jpg Screenshot_2020-08-23-11-45-01-360_com.windyty.android.jpg

      posted in Bug Reports
      A
      AirPollutant
    • Probably wrong units of SO2 concentration

      Hi! Here's a screenshot from Android Russian version of Windy. I guess it should be micrograms not milligrams. Screenshot_20200823-021949_Windy.jpg

      posted in Bug Reports
      A
      AirPollutant