Arctic Matters The Global Connection to Changes in the Arctic (2015) / Chapter Skim
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Global Impacts
Global Impacts
Pages 15-21
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From page 15... ...
Greenland Ice Sheet contributed 1.3 mm (0.05 inches) -- more than 40 percent -- of the total According to measurements from a variety of global sea level rise observed each year.
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From page 16... ...
The jet stream -- an air current generated when colder air masses from the Arctic meet warmer air masses from the tropics -- is a major influence on weather in the Northern Hemisphere. Source: NASA 16 global impacts Arctic Matters
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From page 17... ...
Paul Oberlander, Woods Hole Oceanographic Institution The 2014 National Research Council workshop Scientists cannot currently predict with a high report Linkages Between Arctic Warming and Mid- degree of certainty exactly how climate change will Latitude Weather Patterns summarizes presen- affect ocean circulation. One possibility research tations by meteorologists and climate scientists ers are studying is whether changes in the Arctic about how climate change in the Arctic might Ocean might slow a major current in the Atlantic affect weather elsewhere in the world.
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From page 18... ...
Changes in the Arctic marine ing ecosystem may threaten existing populations. environment could have important implications Atlantic cod, for example, have been displacing for this global food source, with potential effects the endemic polar cod in the waters surrounding on local communities, regional labor markets, the Norwegian archipelago Svalbard.
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From page 19... ...
has been a key concern among scientists since summer Arctic sea ice cover began shrinking in recent decades. As more solar energy is absorbed by the ocean, air, and icy land masses, it enhances the ongoing warming in the Arctic region, which is more pronounced than anywhere else on the planet.
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From page 20... ...
If large areas of per rapid changes in physical, biological, and human mafrost were to thaw, all of that previously-frozen systems around the globe. plant matter would begin to decompose, releasing huge quantities of carbon into the atmosphere in Releasing ancient stores of greenhouse the form of carbon dioxide or methane.
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From page 21... ...
Finally, if a fire is severe enough an abrupt release of a large quantity of methane to burn the surface organic layer of soil, it can speed could cause larger, more rapid climate changes, but the thawing of permafrost below, accelerating the the magnitude of the effect would taper gradually release of carbon from the previously frozen soil. as the methane breaks down in the atmosphere to form carbon dioxide.
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