Current Events

  • Atmospheric CO2 Level Tops 400 ppm
    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm rep...Read more

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    Atmospheric CO2 Level Tops 400 ppm

    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well. The level of atmospheric greenhouse gases continues to increase, now over 120 ppm since the Industrial Revolution began. For more on the Keeling Curve, see http://keelingcurve.ucsd.edu/. Find out more about greenhouse gases and warming.
  • Massive Tornado Outbreak on Tornado Alley
    The week of May 19 brings dozens of tornadoes to Tornado Alley in the states of Oklahoma, Kansas, Io...Read more

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    Massive Tornado Outbreak on Tornado Alley

    The week of May 19 brings dozens of tornadoes to Tornado Alley in the states of Oklahoma, Kansas, Iowa, Illinois and Missouri. On May 20th, a massive tornado struck Moore, Oklahoma, devastating communities - destroying over 100 homes and hitting two elementary schools and a hospital - with many casualties and deaths. Our thoughts are with our friends and colleagues suffering from these storms. For more on the May 20th storms, see the NOAA Storm Prediction Center Storm Report.
  • Kansas Legislator Proposes Bill to Outlaw Sustainability Education
    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of ...Read more

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    Kansas Legislator Proposes Bill to Outlaw Sustainability Education

    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of sustainability. Here is a link to the one-page bill: http://www.kslegislature.org/li/b2013_14/measures/documents/hb2366_00_0000.pdf. See report on Bloomberg News.

Earth's Polar Regions

Do you wonder what Earth's Polar Regions are like? Where do polar bears live? Where do penguins swim? Why does the Sun never shine in winter in the Arctic? Why does aurora occur near the Earth’s Poles? How big are the Earth’s ice caps, and are they changing? The Earth’s Polar Regions are hosts to unique phenomena and ecosystems – both fascinating and beautiful. Explore the Earth’s Arctic and Antarctic through the links in this section.
A sinuous glowing band of <a href="/earth/Magnetosphere/aurora.html&dev=1">aurora</a> (the Aurora Australis or Southern Lights) loops around the <a href="/earth/polar/polar_south.html&dev=1">southern polar</a> region in the distance as viewed by astronauts onboard the space shuttle on <a href="http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/archives/sts-39.html">STS-039</a>.     <a href="/earth/Magnetosphere/aurora/aurora_colors.html&dev=1">Aurora are produced</a> when <a href="/physical_science/physics/atom_particle/particle_radiation.html&dev=1">energetic particles</a> entering the Earth's atmosphere from space interact with <a href="/physical_science/physics/atom_particle/atom.html&dev=1">atoms</a> and <a href="/earth/geology/molecule.html&dev=1">molecules</a> in the atmosphere and release energy, emitted as light. <p><small><em>Courtesy of NASA, Astronaut Overmeyer and Dr. Hallinan</em></small></p>Icebergs floating near Cape York, Greenland in September 2005. Icebergs are large pieces of ice floating in the <a href="/earth/Water/ocean.html&dev=1">ocean</a> that have broken off of <a href="/earth/polar/cryosphere_glacier1.html&dev=1">ice shelves or glaciers</a> in <a href="/earth/polar/polar.html&dev=1">Earth's polar regions</a>. They are a part of the <a href="/earth/polar/cryosphere_intro.html&dev=1">cryosphere</a>.  Approximately 90% of an iceberg's <a href="/glossary/mass.html&dev=1">mass</a> is below the surface of the seawater. Because ice is less dense than water, a small portion of the iceberg stays above the seawater.<p><small><em>Image courtesy of Mila Zinkova, Creative Commons Attribution ShareAlike license</em></small></p>Roaming across Arctic <a href="/earth/polar/sea_ice.html&dev=1">sea ice</a>, <a href="/earth/polar/polar_bears_jan07.html&dev=1">polar bears</a> peer through cracks in the ice to look for ringed seals, their favorite food, in the water below. Almost all of a polar bear's food comes from the sea. The <a href="/earth/polar/sea_ice.html&dev=1">floating sea ice</a> is a perfect vantage point for the bears as they hunt for food. Unfortunately, the amount of sea ice floating in the <a href="/earth/polar/polar_north.html&dev=1">Arctic region</a> is shrinking each year, and getting farther apart.<p><small><em>Image courtesy of Ansgar Walk. Creative Commons Attribution-Share Alike 2.5 Generic license.</em></small></p><a href="/earth/polar/inuit_culture.html&dev=1">The Inuit</a> are the native cultures that continue to live on coastal areas of <a href="/earth/polar/arctic_tundra.html&dev=1">Arctic tundra</a> in Canada, Alaska (USA), Siberia (Russia), and Greenland. This picture shows several Inuit constructing an igloo with blocks of <a href="/earth/polar/cryosphere_snow1.html&dev=1">snow</a> in November, 1924. Traditionally, Inuit lived in igloos during the coldest months and tent-like huts during the warmer months.<p><small><em> Library of Congress Prints and Photographs, Photograph by Frank E. Kleinschmidt</em></small></p>Did you know that the Earth’s <a href="/earth/polar/polar_geog.html&dev=1">geographic North pole</a> is not in the same place as the Earth’s <a href="/earth/Magnetosphere/earth_north_magnetic_pole.html&dev=1">North magnetic pole</a>?  They are actually several hundred kilometers apart, making navigation with a compass impossible near the poles.  This picture illustrates where they were in 2005.  Right at the geographic poles, the <a href="/sun/sun.html&dev=1">Sun</a> shines for half the year and it is dark for the other half of the year. This makes a year like one long day.<p><small><em>Image courtesy of Windows to the Universe</em></small></p>Greenland’s <a href="http://www.windows2universe.org/earth/polar/cryosphere_glacier1.html">ice sheet</a> saw a record <a href="http://www.windows2universe.org/headline_universe/olpa/greenland_10dec07.html">melt</a> in July 2012. Scientists studying this event have found that this melting event was triggered by an influx of unusually warm air and amplified by the presence of a blanket of thin low-level <a href="http://www.windows2universe.org/earth/Atmosphere/cloud.html">clouds</a> which pushed temperatures up above freezing. For more information see the <a href="http://www.news.wisc.edu/21638">press release</a> from the University of Wisconsin Madison.<p><small><em>Image courtesy of University of Wisconsin-Madison</em></small></p>

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Explore Earth's Polar Regions

Geography and Geology at the Poles

Location The polar regions are the areas that surround Earth’s geographic North and South Poles. ...Read more

Magnetic Field at the Poles

Earth has a magnetic field. If you imagine a gigantic bar magnet inside of Earth, you'll have ...Read more

Polar Atmosphere

Phenomena in the Polar Atmosphere There are some unique phenomena that happen in the atmosphere ...Read more

Polar Oceans

There are two oceans in Earth’s polar regions: the Arctic Ocean, which occupies most of the ...Read more

Ice (The Cryosphere!)

The cryosphere includes the parts of the Earth system where water is in its frozen (solid) ...Read more

Polar Life

All sorts of living things call Earth’s polar regions home – from tiny lichens encrusting the ...Read more

Climate Change in Polar Regions

The effects of climate change are not felt with the same intensity in all parts of the world. ...Read more

Our Changing Planet

When we look around us, we can see that our planet's climate is changing rapidly. The National ...Read more

Arctic Cultures

There are people of different cultures and backgrounds who live in the Arctic region. Read ...Read more

Exploration at the Poles

Polar exploration includes the physical exploration of the Arctic and the Antarctica. The Arctic ...Read more

Postcards from the Poles

Antarctica is unique. It's cold. It's remote. And for the most part it is covered with ice. ...Read more

More about Earth's Polar Regions

Historical Events

5/24 Nicholas Copernicus, a Polish astronomer, died on this date in 1543 Details
5/30 7.5 magnitude quake hits Quetta, Pakistan in 1935
5/31 7.9 magnitude earthquake hits Peru in 1970

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Did you know?

Did you know that it can get as cold as -70 degrees Celsius in the Arctic tundra during the winter?

Did you know that Earth is the largest and densest rocky planet in the solar system?

 

Earth and Space Science Concept of the Day

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Umbra
xUmbra : The shadow cast by a celestial body

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Research Highlights

Caribbean Coral Reef Protection Efforts Miss the Mark

Conservation efforts aimed at protecting endangered Caribbean corals may be overlooking regions where corals are best equipped to evolve in response to global warming and other climate challenges. That's...Read more

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