The 1981 to 2010 median is in dark gray. SAM is influenced by El Niño-Southern Oscillation conditions, so it is partly driven by natural oscillations. DOI: 10.1029/2019GL086729 … Left: Average Antarctic sea ice concentration for September 2020. State of the Cryosphere: Ice Shelves, National Snow and Ice Data Center. Young, thin ice floats in the Amundsen Sea on October 16, 2009. In the past decade, the yearly minimum has been extremely variable, hitting both record highs and record lows. Figure 6. (In the Arctic, multiyear ice that survives at least one summer is generally 3 to 4 meters thick, and even seasonal ice that formed since the previous summer can often reach about 2 meters in thickness.) This app displays the monthly mean sea ice extent for the Arctic and Antarctic along with the historical median extent. The Antarctic is a continent surrounded by a vast ocean. Replace "global" with "arctic" sea ice and that's what the graph on the left represents. This was the 13 th lowest extent for this date in the satellite record, the lowest having been 16.54 in 1986 (Figure 6). The sea ice extent period of record is from 1979–2020 for a total of 42 years. In this paper we propose a mathematical and statistical decomposition of this temporal variation in SIE. On March 5, 2020, Arctic sea ice hit its greatest extent for the year at 15 million square kilometers (5.7 million square miles), an improvement over recent winters, but “no reason to take what we are seeing as evidence for a recovery,” according to Mark Serreze, director of the National Snow and Ice Data Center. Antarctic sea ice extent on 10 th August 2020 was 17.36 million square km, 0.16 million square km below the 1981-2010 average. Accessed April 7, 2020. Antarctica is surrounded by ocean, not a land surface that is losing its reflective snow and ice cover in the spring and summer. 2020 is shown in blue, 2019 in green, 2018 in orange, 2017 in brown, 2016 in purple, and 2014 in dashed brown. Sea ice concentration in the Southern Ocean around Antarctica during the most recent summer minimum (February 2020) and winter maximum (September 2019). Sea Ice Index, National Snow and Ice Data Center. Satellite images of sea ice off the Oates Coast of Antarctica on October 7, 2018, (left) and January 12, 2019 (right). It was already normal, historically, for summertime sea ice to melt back nearly to the Antarctic coastline, leaving large expanses of the Southern Ocean exposed to heating from the summer sun. Overall, the long-term trend in Antarctic sea ice is nearly flat. 26 days ago. For the Arctic, the median June Outlook for September 2020 sea-ice extent is 4.33 million square kilometers, with quartiles of 4.06 and 4.59 million square kilometers. Change in land ice mass since 2002 (Right: Greenland, Left: Antarctica). The timing of the seasonal cycles isn’t the only way that Antarctic sea ice differs from the Arctic. Antarctica is colder than the Arctic, but it’s still losing ice. At the other end of the world, Antarctic sea ice is approaching its winter maximum, which occurs a few weeks later. Starting in 2016, Antarctica sea ice extent was mostly below the 1981–2010 average. The years 2012, 2013, and 2014 brought record highs; 2017 and 2018 brought record lows. Climate.gov. Another region near the northern tip of the Peninsula, in the Weddell Sea, showed strong sea ice declines until 2006, but the ice in that region has rebounded in recent years. From 1979–2017, Antarctic-wide sea ice extent showed a slightly positive trend overall, although some regions experienced declines. OC: 20. Social Media channels are restricting Electroverse’s reach; Twitter are purging followers, and Facebook are labeling posts as “false” — be sure to subscribe to receive new post notifications by email (the box is located in the sidebar >>> or scroll down if on mobile). The 1981 to … 2020 is the fourth year in a row with a markedly lower than average extent in January. Previous Sea Ice Extent (Global Antarctic and Arctic) – Day 331 2020. Fact-checked! From the start of satellite observations in 1979 to 2014, total Antarctic sea ice increased by about 1 percent per decade. Those exceptions have occurred around the Antarctic Peninsula. Posted by. Sea ice concentration in June 2020 = 10.6 million sq km Sea ice concentration in June 1980 = 9.6 million sq km. The heavy snow burden can depress ice floes, and seawater can subsequently flood those floes. The region south and west of the Antarctic Peninsula has shown a persistent decline, but this downward trend is small compared to the high variability of Antarctic sea ice overall. (Meanwhile, the Antarctic ice sheets are losing mass.). Extents for March and early April 2020 were near the long-term average. Each component is interpretable and, when combined, gives a complete picture of the variation in the sea ice. The UN and their scraggly little offshoot, the IPCC, are at it again — obfuscating data in order to push their fraudulent catastrophic global warming agenda. Charctic, National Snow and Ice Data Center. Compared to the Arctic, Antarctic sea ice shows less variability in summer, and more variability in winter. We particularly encourage submissions for the Alaska region (i.e., Bering, Chukchi, and Beaufort seas). But sea ice retreat alone rarely, if ever, initiates the disintegration process; other factors such as warm ocean water and surface melt on the ice shelf are usually at work, too. Antarctic sea ice extent reached 4.6 million km2 on average in January 2020, which was 0.9 million km2 (or about 17%) below the 1981-2010 average for January. For three consecutive Septembers from 2012 to 2014, satellites observed new record highs for winter sea ice extent. Oh, and throw in Washington, D.C. for good measure. Where sea ice does melt away completely in the Antarctic summer, the ice’s absence can have cascading effects. Since September 2016, Antarctic sea ice extents have mostly fallen well below the 1981–2010 average, and even below the long-term range of variability for nearly every month. The eastern Ross Sea region has shown a modest increase in ice extent over the same period. Warmer conditions on land affect the nearby ocean, and more sea ice melts as a result. NOAA Climate.gov graphic from National Snow and Ice Data Center data. Sea ice extent provided by the National Snow and Ice Data Center (NSIDC) is available from 1979–2020 for the Northern Hemisphere, Southern Hemisphere, and Globe. The map above shows the extent of sea ice around Antarctica on February 21 as measured by satellites. The sea ice extent data for the Arctic and Antarctic are provided by the National Snow and Ice Data Center (NSIDC) and are measured from passive microwave instruments onboard NOAA Satellites. One key difference is the larger range between austral winter maximum extent and summer minimum extent. By greenhouse gas emissions, are also shown by the scatter points with color in reference to Arctic... Combined, gives a complete picture of the world, Antarctic sea ice satellite record experienced both its and! 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