National Aeronautics and Space Administration

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    • كانون الثاني 2021
      المصدر: National Aeronautics and Space Administration
      تم التحميل بواسطة: Knoema
      تم الوصول في: 02 شباط, 2021
      تحديد مجموعة بيانات
      NASA Global Temperature Anomaly dataset contains the change in global surface temperature relative to 1951-1980 average temperatures. This research is broadly consistent with similar constructions prepared by the Climatic Research Unit and the National Oceanic and Atmospheric Administration. Credit: NASA Scientific Visualization Studio
    • تشرين الأول 2020
      المصدر: National Aeronautics and Space Administration
      تم التحميل بواسطة: Knoema
      تم الوصول في: 20 تشرين الأول, 2020
      تحديد مجموعة بيانات
      Ozone is a gas made up of three oxygen atoms (O3). It occurs naturally in small (trace) amounts in the upper atmosphere (the stratosphere). Ozone protects life on Earth from the Sun’s ultraviolet (UV) radiation. In the lower atmosphere (the troposphere) near the Earth’s surface, ozone is created by chemical reactions between air pollutants from vehicle exhaust, gasoline vapors, and other emissions. At ground level, high concentrations of ozone are toxic to people and plants.  The maximum of the daily ozone hole size and the minimum of the Southern Hemisphere daily ozone minimums for each year and the date of occurrence. Date links are to the image for the particular day. There are no data for 1995. 
    • أيلول 2021
      المصدر: National Aeronautics and Space Administration
      تم التحميل بواسطة: Knoema
      تم الوصول في: 30 أيلول, 2021
      تحديد مجموعة بيانات
      Carbon dioxide (CO2) is an important heat-trapping (greenhouse) gas, which is released through human activities such as deforestation and burning fossil fuels, as well as natural processes such as respiration and volcanic eruptions. 
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