The Changing Arctic Climate

As global temperatures rise,
the Arctic is experiencing the fastest rates of warming.

-3.5 -3 -2 -1 0 1 2 3 4 4.5
Rate of temperature change (°F per century)

+4.2°F per century

The rate of warming in Alaska is more than
double that of the contiguous United States.

Between 1925 and 2023, Alaska's North Slope
experienced the fastest rate of temperature
change of anywhere measured in the U.S.

Warming has major consequences
for Alaskan people and ecosystems.

-40

40 or more

No data

- Change in annual unfrozen days

mikA.kkkkkklA

GROUND
TEMPERATURE

The number of days each
year that Alaska's ground
surface is unfrozen
has increased at a if
rate of about four I
days per decade. I "

-0.3 to 0 to 0.3 to 0.6 to 0.9 to 1.2 to

0 0.3 0.6 0.9 1.2 1.5
Change in underground permafrost
temperature (°F) per decade

PERMAFROST

Following air temperature
trends, permafrost has
warmed more	r\ i,

quickly in northern £ -
Alaska than	I

interior Alaska.

September, 1979 September, 2023

SEA ICE

September 2023 sea ice
extent was the:

5th lowest for any

September on record and

n OS below the 1981- 2020
average sea ice extent.

epa.gov/climate-indicators

December 2024
EPA 430-F-24-010

¦ • ' ¦ v - m
^ •. -

-------