Tundra Articles

• Snow and Avalanches
  Storms
  Severe Weather
  Geography
  Environmental Issues
  Water
   
  

  Lake effect snow

  Lake effect snow, which can be a type of snowsquall, is produced in the winter when cold winds move across long expanses of warmer lake water, picking up water vapor which freezes and is deposited on ... > more
• Global Warming
  Water
  Geography
  Oceanography
  Climate
  Ice Ages
   
  

  Iceberg

  An iceberg is a large piece of ice that has broken off from a snow-formed glacier or ice shelf and is floating in open water. Since the density of pure water ice is ca. 920 kg/m3, and that of sea ... > more
• Ozone Holes
  Environmental Issues
  Air Quality
  Atmosphere
  Air Pollution
  Pollution
   
  

  Ozone depletion

  Ozone depletion describes the observed loss of ozone in the stratosphere over the past 50 years. It encompasses both a steady thinning of the ozone layer at mid-latitudes and its catastrophic ... > more
• Ozone Holes
  Environmental Issues
  Atmosphere
  Air Quality
  Air Pollution
  Pollution
   
  

  Ozone layer

  The ozone layer is the part of the Earth's atmosphere which contains relatively high concentrations of ozone (O3). "Relatively high" means a few parts per million - much higher than the ... > more
• Mining
  Geology
  Earth Science
  Geochemistry
  Oceanography
  Earthquakes
   
  

  Quartz

  Quartz is one of the most common minerals in the Earth's continental crust. It belongs to the hexagonal crystal system, and is made up of silica (SiO2) tetrahedra. Quartz has a hardness of 7 on the ... > more
• Oceanography
  Geography
  Earth Science
  Water
  Ecosystems
  Ecology
   
  

  Ocean

  Though generally recognized as several 'separate' oceans, these waters comprise one global, interconnected body of salt water often referred to as the World Ocean or global ocean. This concept of a ... > more
• Wildfires
  Natural Disasters
  Earthquakes
  Ecology
  Exotic Species
  Rainforests
   
  

  Wildland fire suppression

  Wildland fire suppression is a unique aspect of firefighting. Wildland firefighting requires different tactics, equipment, and training from the normal structure fire fighting found in populated ... > more
• Geography
  Forest
  Earthquakes
  Water
  Weather
  Global Warming
   
  

  Himalayas

  The Himalayas, also Himalaya, are a mountain range in Asia, separating the Indian subcontinent from the Tibetan Plateau. By extension, it is also the name of the massive mountain system which ... > more
• Ice Ages
  Global Warming
  Climate
  Nature of Water
  Oceanography
  Snow and Avalanches
   
  

  Ice age

  An ice age is a period of long-term reduction in the temperature of Earth's climate, resulting in an expansion of the continental ice sheets, polar ice sheets and mountain glaciers. Glaciologically, ... > more
• Severe Weather
  Storms
  Tornadoes
  Hurricanes and Cyclones
  Snow and Avalanches
  Geomagnetic Storms
   
  

  1993 North American storm complex

  The 1993 North American storm complex, also known as the (Great) Blizzard of 1993, or the Storm of the Century, was a large cyclonic storm that occurred on March to March 15, 1993, on the East Coast ... > more

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