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Video on "Changes in the Arctic"

               
Changes in the Arctic.

The temperatures in the Arctic continue to rise at three times the global annual average, driving many of the changes underway in the Arctic. Most prominently, snow and ice are melting at an increasing rate. This impacts both local ecosystems and the global climate system. It contributes to rising sea levels, and is likely to provoke extreme temperature events beyond the Arctic. The effects of a shifting Arctic climate are felt across the high latitudes and beyond – with global environmental, economic, and social implications.




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Melting ice: 

Snow and ice are melting at an increasing rate, contributing to rising sea levels 
The loss of sea ice threatens the habitat of marine mammals and disrupts the food supply of Arctic communities

Loss of sea ice and ocean warming :

The loss of reflective sea ice and ocean warming are changing the abundance and range of fish species
The longer ice-free season exposes Arctic communities to erosion from winter storms


Transformation of the tundra :

The tundra is being transformed from a carbon sink to a carbon source due to increased wildfires
The tundra is becoming a source of carbon to the atmosphere, which is already absorbing record levels of heat-trapping fossil fuel pollution

Other changes:

Declines of previously large inland caribou herds
Increasing winter precipitation, Changes in food webs, prey populations, and the arrival of new marine mammal species
Expansion of harmful algal blooms.