Record minima sea ice extent, summer and winter

February and June 2024

Antarctica

Late summer, late

Antarctic sea ice extent fell to record lows in 2023 for both the summer minimum and the winter maximum.

GCW Sea Ice Assessment for 2023

Great Lakes record low ice cover

February 2024

Great Lakes, USA

Late winter

As of 1 March 2024, ice cover on the Great Lakes (USA) is significantly below average for this time of the year. Peak ice cover on the Great Lakes is typically around 53%. In mid-February this year, it was 2.7%. Lake Erie and Ontario are at or tied with their historic lows, with both being essentially ice-free.

GCW Interesting Events

Record high temperature at Esperanza Base

6, 9 February 2020

Antarctic Peninsula

A few days

The highest temperature ever recorded in Antarctica, 20.75°C (69.35°F) occurred on 9 February 2020 at Argentina's Marambio research base on Seymour Island off the Antarctic Peninsula. A few days earlier, on 6 February 2020, Argentina's Esperanza Base recorded 18.3°C (64.9°F), which surpassed the previous record of 17.5°C (63.5°F) set on 24 March 2015 at the same location. Temperature records from Esperanza date back to 1961.

Phys-Org

Record high temperature north of 80N

Early July

Alert, Canada and Anchorage, Alaska

Two days

Temperatures in Alert, Nunavut, Canada, peaked at 21°C (70°F). The previous temperature record of 20°C for the town was set in 1956. This is the first time that Alert has recorded two consecutive days exceeding 20°C (68°F) in its history. According to Tyler Hamilton of the Weather Network, this is also the first time a temperature warmer than 20°C has been measured north of 80° on the planet. Anchorage, Alaska reached 32°C (89.6°F) on 4 July 2019, shattering the seasonal high of around 24°C (75°F).

The Independent

Record minimum extent for January

1 January 2019

Antarctica

To be determined

On 1 January 2019, the sea ice area around the Antarctic continent was the smallest January area since the satellite record began in 1978. The sea ice area was 30,044 sq km (11,600 sq mi) below the previous record low for 1 January, which was set in 2017.

USA Today, NSIDC

Record snow extent

14-21 June 2017

Southern Argentina and Chile

One week

During 14-21 June 2017, the southern portion of South America was affected by an intense early winter snowstorm that dumped up to 178 cm (70 inches) of snow in mountainous areas of Argentina and Chile and caused record levels of snow extent both in the mountains and in the adjacent plains. Large values of snow fraction, over 70-80%, in savannah areas of southern Argentina indicate a substantial depth of the snow pack of 15-20 cm or more. This snow cover extent, which reached close to 750,000 km2, has not been observed in the region in at least the last twelve years.

P. Romanov, CREST/CUNY (USA)

New record low ice extent for Oct-Mar

October 2016 - March 2017

Arctic Ocean

Six months

October and November set a new record minimum ice extents for their respective months. November was 800,000 km² below November 2006, the previous lowest November. The record respective monthly lows continued through March 2017, when the ice reached its annual maximum extent on March 7. It was the lowest maximum in the 38-year satellite record.

GCW, NSIDC

New record low sea ice extent for November

Nov-16

Antarctica

One month

Antarctic sea ice reached its annual maximum extent much earlier than average on August 31. It reached a new record low (in the satellite era) for the month of November.

NSIDC

Record warm winter months

January-February 2016

Arctic Ocean

Two months

The warmest January and February on record in the Arctic occurred in 2016, with an area-averaged (66-90^oN) temperature anomaly of 5.8^oC, based on the U.S. National Centers for Environmental Prediction (NCEP) and National Center for Atmospheric Research (NCAR) reanalysis products. The unusual warmth covers almost the entire Arctic Ocean, with the Canada Basin and the area north of Franz Josef Land to the North Barents Sea and east of Svalbard having the largests anomalies.

NOAA Arctic theme page

A new record low maximum Arctic sea ice extent

24 March 2016

Arctic Ocean

March

Arctic sea ice extent reached its maximum on 24 March for 2016 with 14.52 million square kilometers; this is the lowest maximum ever recorded during the satellite era. Arctic sea ice was at a record low maximum extent for the second straight year and was 1.12 million square kilometers below the 1981 to 2010 average.

NSIDC - Arctic Sea Ice News and Analysis. NSIDC

Lowest maximum Arctic sea ice extent on record

25 February 2015

Arctic Ocean

February

The maximum Arctic sea ice extent for 2015 was 14.54 million square kilometers which was the lowest maximum ever recorded during the satellite era. The 2015 maximum Arctic sea ice extent was 130,000 square kilometers lower than the previous record low which occurred in 2011 and 1.10 million square kilometers below the 1981 to 2010 average.

NSIDC - Arctic Sea Ice News and Analysis. NSIDC

Maximum Antarctic sea ice extent on record

22 September 2014

Southern Ocean

September

Antarctic sea ice extent reached a new record maximum, since the start of the satellite era, on 22 September 2014. The sea ice extent was 20.11 million square kilometers which exceeded the 1981 to 2010 average maximum extent by 1.54 million square kilometers, and the previous record ice extent in October 2013 by 560,000 square kilometers.

NSIDC - Arctic Sea Ice News and Analysis. NSIDC

Unusual snow cover extent retreat

April-June 2013

Northern Hemisphere

First half of 2013

Snow cover extent in the NH at the beginning of 2013 was the highest ever recorded. Extent remained fairly high until mid-April, when it began to decrease rapidly. Compared to previous maximum snow retreat figures for 30, 45, and 60 day periods, 2013 shows the most rapid retreat of all recorded years in all three categories.

CIRES, NSIDC, Rutgers Snow Lab. Web

Record minimum Arctic sea ice extent

16 September 2012

Arctic Ocean

Summer

Arctic sea ice extent averaged for September 2012 was 3.41 million square kilometers. This was 3.43 million square kilometers below the 1979 to 2000 average extent, and 690,000 square kilometers less than the previous record low for the month that occurred in 2007.

National Snow and Ice Data Center (USA). NSIDC

Greenland Ice Sheet experiences extensive surface melt

11-12 July 2012

Greenland Ice Sheet (GrIS, GIS)

2 day period

The most recent melt event prior to July 2012 was recorded at Summit in 1889. This instance was one of only eight events to occur in the past ~1500 years. Ice core records from this location suggest this type of melt event generally occurs only once every ~150 years.

NASA's Cryospheric Sciences Program and the National Science Foundation. Journal paper

Extreme temperatures and snowfall over Northern Hemisphere

December 2009 to February 2010

Eurasia, Russia, United States

Winter months

China, South Korea, Italy, Spain, Germany, the U.S., and others reported record or near-record snowfall measurements and/or low temperatures. Inversely, Canada and most of the Arctic region experienced temperatures well above average, as much as +6°C above average, and exceptionally low snowfall. It was Canada's warmest winter on record since 1948.

World Meteorological Organization (WMO/TD-No. 1550)

Wilkins ice shelf collapse

25 March 2008

Wilkins Ice Shelf (WIS), Antarctic Peninsula

Summer months

WIS is unique in that it is primarily composed of sea ice accumulation and only a small portion of the shelf is made up of land-fed glaciers. Recorded break-ups have occurred in 1998, 2008, 2009, and March of 2013. The most recent event included the loss of the ice bridge supporting the shelf. The March 2008 event saw a loss of 405 sq. km of the shelf.

National Snow and Ice Data Center (USA). NSIDC

Loss of ice shelves on Ellesmere Island

22 March 2008

Northern coast of Ellesmere Island

July, August

A portion of the shelf (Ayles) broke free in 2005, leaving Canada with only five ice shelves by 2008--Serson, Petersen, Milne, Ward Hunt, and Markham. July-August 2008 saw collapses or calving of the Ward Hunt and Searson shelves for losses of 42 sq. km and 122 sq. km, respectivly. The Markham shelf completely broke away from the coast for a loss of 50 sq. km.

NASA's Earth Observatory.

Larsen B ice shelf breaks up and disintegrates

31 January 2002

Larsen B Ice Shelf (LBIS), eastern side of Antarctic Peninsula

35 day period

Evidence suggests that the 220-meter thick LBIS had existed for at least 400 years prior to the disintegration event, and probably since the end of the last major glaciation ~12000 years ago. The 720 billion tons of ice that broke off from the shelf may have been a response to fracturing caused by meltwater seeping into surface cracks, resulting in a loss of 1,049 square miles of shelf.

National Snow and Ice Data Center (USA). NSIDC, NASA

Record low temperature for Northern Hemisphere

22 December 1991

Greenland

One day

In September 2020, WMO recognized a temperature of -69.6°C (-93.3°CF) at an automatic weather station in Greenland on 22 December 1991 as the lowest ever recorded in the Northern Hemisphere. The previous temperature record of -67.8°C was recorded at the Russian sites of Verkhoyanksk (February 1892) and Oimekon (January 1933).

WMO

Glacial Lake Outburst Floods (GLOFs) in Himalayas

August 4 1985

Nepal

Summer months

In 1985, the Nepalese glacial lake Dig Tsho burst, causing huge damages to infastructure. Tsho Rolpa, the largest and most dangerous known glacial lake, still poes a threat despite precautions that have been taken. Past GLOFs in the Himalayas have even affected some communities over 100 km downstream.

Germanwatch. Information booklet

Glacial Lake Outburst Floods (GLOFs) in Alps

During summer months of 1968

Switzerland

Summer months

The Swis Alps hold many small glacial lakes in close proximity of small towns and villages, leaving potential for destruction. A GLOF in 1968 of a lake located on the Grubengletscher glacier caused serious damage to the nearby city Saas Balen. A 1996 GLOF in Iceland produced peak flow rates of over 50 000 m³/s, creating a temporary river only second in volume to the Amazon.

Germanwatch. Information booklet