Warming in the Arctic is
accelerating. On June 25, 2015, high temperatures hit North America.
Temperatures as high as 30.3°C (86.54°F) were recorded where the
Mackenzie River is flowing into the Arctic Ocean.
temperatures at such locations are very worrying, for a number of
are examples of heatwaves that can increasingly extend far to the
north, all the way into the Arctic Ocean, speeding up warming of
the Arctic Ocean seabed and threatening to unleash huge methane
set the scene for wildfires that emit not only greenhouse gases
such as carbon dioxide and methane, but also pollutants such as
carbon monoxide (that depletes hydroxyl that could otherwise break
down methane) and black carbon (that when settling on ice causes it
to absorb more sunlight).
cause warming of the water of rivers that end up in the Arctic
Ocean, thus resulting in additional sea ice decline and warming of
the Arctic Ocean seabed.
image below shows increased sea surface temperature anomalies in the
Arctic. Note the warming in the area of the Beaufort Sea where
the Mackenzie River is flowing into the Arctic Ocean.
image below further illustrates the situation, with sea ice
thickness (in m) down to zero where the Mackenzie River flows into
the Arctic Ocean and in the Bering Strait where warm water from the
Pacific is entering the Arctic Ocean.
situation is dire and calls for comprehensive and effective action,
as discussed at the Climate