Sea Ice Extent

June 2017 Sea Ice Extent
1981-2010
Anomaly
Trend
(per decade)
Rank
(out of 39 years)
Records
million km2 million mi2 Year(s) million km2 million mi2
Northern Hemisphere 10.76 4.15 -8.58% -3.99% Largest 35th 1979 12.53 4.84
Smallest 5th 2016 10.41 4.02
Southern Hemisphere 12.41 4.79 -7.04% +1.50% Largest 38th 2014 14.69 5.67
Smallest 2nd 2002 12.38 4.78
Globe 23.17 8.95 -7.76% -1.07% Largest 39th 1979 26.72 10.32
Smallest 1st 2017 23.17 8.95

Data Source: National Snow and Ice Data Center (NSIDC). Period of record: 1979–2017 (39 years)

According to the National Snow and Ice Data Center (NSIDC), the Northern Hemisphere (Arctic) sea ice extent — which is measured from passive microwave instruments onboard NOAA satellites — averaged for June 2017 was 11.06 million square km (4.27 million square miles), 900,000 square km (348,000 square miles), or 7.53 percent, below the 1981-2010 average. This was the sixth smallest June Arctic sea ice extent since records began in 1979, but the largest since 2014. For the entire month, the rate of sea ice loss was 81,800 square km (31,600 square miles) per day, which was faster than the 1981-2010 average rate of 56,300 square km (21,700 square miles) per day. By the end of June, the daily sea ice extent was at near record-low levels. Regionally, sea ice extent was below-average in the Chukchi and Barents Seas with near-average ice extent in the Greenland Sea. June Arctic sea ice extent is decreasing at an average rate of 3.6 percent per decade.

The June Southern Hemisphere (Antarctic) sea ice extent was 13.08 million square km (5.05 million square miles), which was 880,000 square km (340,000 square miles), or 6.30 percent, below the 1981-2010 average. This was the second smallest June Southern Hemisphere sea ice extent on record with only the June Antarctic sea ice extent in 2002 smaller. The rate of ice growth slowed early in the month, causing daily sea ice extent to approach near-record low levels. Sea ice was below average in the Bellingshausen Sea and parts of the Amundsen and Ross Seas. Southern Hemisphere June sea ice extent is increasing at an average rate of 1.3 percent per decade, with substantial inter-annual variability.

For further information on the Northern and Southern Hemisphere snow and ice conditions, please visit the NSIDC News page.

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Citing This Report

NOAA National Centers for Environmental Information, State of the Climate: Monthly Global Snow and Ice Report for June 2017, published online July 2017, retrieved on August 18, 2022 from https://www.ncei.noaa.gov/access/monitoring/monthly-report/global-snow/201706.

Metadata

https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.ncdc:C00763