NASA shows aerosols all over the world in one vivid image



Aerosols – they are all around you and you are inhaling millions of them right now. These small solid and liquid particles suspended in the atmosphere include dust, smoke, pollen, soot and even volcanic ash.

Earth observation satellites use the Moderate Resolution Imaging Spectroradiometer (MODIS) to measure the optical thickness of the aerosol from hundreds of kilometers above the Earth. These measurements are based on the fact that aerosols change the reflection and absorption of visible and infrared light into the atmosphere. NASA has now released a vivid image that shows the aerosol flow over the surface of the earth. According to NASA: "An optical thickness of less than 0.1 (pale yellow) indicates a crystal clear air with maximum visibility, while a value of 1 (reddish brown) indicates very hazy conditions."

The image released on August 23, 2018, illuminates the atmospheric aerosols on that day based on data from satellites Terra, Aqua, Aura and Suomi NPP.

  • The blue color indicates sea salt aerosols, natural aerosols that are entrained in the atmosphere and come from sea spray.
  • The red indicates black carbon particles. Forest fires, emissions from industries and cars are the common source.
  • Dust particles are highlighted in purple.

According to NASA: "On that day huge plumes of smoke were floating over North America and Africa, three different tropical cyclones turned in the Pacific Ocean, and large dust clouds blew over deserts in Africa and Asia."


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NASA shows aerosols all over the world in one vivid image



Aerosols – they are all around you and you are inhaling millions of them right now. These small solid and liquid particles suspended in the atmosphere include dust, smoke, pollen, soot and even volcanic ash.

Earth observation satellites use the Moderate Resolution Imaging Spectroradiometer (MODIS) to measure the optical thickness of the aerosol from hundreds of kilometers above the Earth. These measurements are based on the fact that aerosols change the reflection and absorption of visible and infrared light into the atmosphere. NASA has now released a vivid image that shows the aerosol flow over the surface of the earth. According to NASA: "An optical thickness of less than 0.1 (pale yellow) indicates a crystal clear air with maximum visibility, while a value of 1 (reddish brown) indicates very hazy conditions."

The image released on August 23, 2018, illuminates the atmospheric aerosols on that day based on data from satellites Terra, Aqua, Aura and Suomi NPP.

  • The blue color indicates sea salt aerosols, natural aerosols that are entrained in the atmosphere and come from sea spray.
  • The red indicates black carbon particles. Forest fires, emissions from industries and cars are the common source.
  • Dust particles are highlighted in purple.

According to NASA: "On that day huge plumes of smoke were floating over North America and Africa, three different tropical cyclones turned in the Pacific Ocean, and large dust clouds blew over deserts in Africa and Asia."


Source link

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