MSGID: 1:317/3 63b5beaf   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
   January 4, 2023 - Haze over China   
      
      Aerosols   
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      A thick aerosol haze blanketed North Central China on the opening days   
      of 2023. The Moderate Resolution Imaging Spectroradiometer acquired a   
      true-color image of a gray blanket swathing the region on January 3.   
      
      The haze is so thick that it obscures most of the North China Plan, the   
      agricultural heartland of the country, from view. Beijing, the   
      country’s capital city, is hidden under the aerosol haze in the upper   
      left (northeast) section of the image. The gray shroud thins against   
      the Western Hills (Xishan) as the elevation rises, but seeps into   
      valleys and over rivers where it forms sinuous and branching patterns.   
      
      Outbreaks of severe haze in this region are frequent, especially during   
      cooler temperatures. They generally occur during the winter because of   
      temperature inversions. Air normally cools with altitude, but during an   
      inversion warm air settles above a layer of cool air near the surface.   
      The warm air acts like a lid and traps pollutants near the surface,   
      especially in basins and valleys. Common sources of pollution in the   
      winter include coal and wood burning for heat, industrial activity, and   
      vehicle emissions. Smoke from fires and dust storms can also contribute   
      to poor air quality.   
      
      Image Facts   
      Satellite:  Terra   
      Date Acquired: 1/3/2023   
      Resolutions:  1km (897.3 KB),  500m (2.6 MB),  250m (7.8 MB)   
      Bands Used: 1,4,3   
      Image Credit: MODIS Land Rapid Response Team, NASA GSFC   
      
      
      
   https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2023-01-04   
       
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