Sea Ice - NOAA Arctic
WEBSea ice extent. One of the most commonly used indicators of long-term Arctic sea ice conditions is sea ice extent, which is defined as the total area covered by ice of at least 15% concentration. The primary source of extent observations is the 45-year record (starting in 1979) derived from satellite-borne passive microwave sensors.
Current State of Sea Ice Cover | Earth - NASA
WEB2 days ago · Color-coded map of the daily sea ice concentration in the Northern Hemisphere for the indicated recent date along with the contours of the 15% edge during the years with the least extent of ice (in red) and the greatest extent of ice (in orange) during the period from November 1978 to the present.
Arctic Change: Ice - Sea Ice - National Oceanic and Atmospheric ...
WEBThe sea ice area for the Arctic shows near-record minimums since 2002. The maps below show the areas for September (shaded) relative to the median extent (purple line). The median extent is based on the period 1981-2010.
Sea Ice Index Daily and Monthly Image Viewer
WEBThe daily Sea Ice Index provides a quick look at Arctic-wide changes in sea ice. It provides consistently processed daily ice extent and concentration images and data since 1979.
Sea Ice - NOAA Arctic
WEBThe substantial decline in Arctic ice extent since 1979 is one of the most iconic indicators of climate change. The seasonal cycle of Arctic sea ice is characterized by the maximum annual extent in March, decreasing through spring and summer to an annual minimum extent in September.
Sea Ice - NOAA Arctic
WEBSea ice extent. Sea ice extent, defined as the total area covered by ice of at least 15% concentration, is a common metric to assess seasonal and long-term changes in Arctic sea ice. Starting in 1979, there is now a 44-year record of ice extent derived from a consistent series of satellite-borne passive microwave sensors.
Charctic Interactive Sea Ice Graph - National Snow and Ice Data …
WEBVisualize sea ice extent (area of ocean with at least 15 percent sea ice concentration) data for the Arctic and Antarctic. View and compare sea ice extent data for any year or any combination of years from 1979 to present (including near-real-time daily data).
Arctic Sea Ice Minimum Extent | Vital Signs – Climate Change: …
WEBKey Takeaway: Summer Arctic sea ice extent is shrinking by 12.2% per decade due to warmer temperatures. Arctic sea ice reaches its minimum extent (the area in which satellite sensors show individual pixels to be at least 15% covered in ice) each September.
Climate Change Indicators: Arctic Sea Ice | US EPA - U.S.
WEBJun 27, 2024 · Figure 1 shows Arctic sea ice extent from 1979, when routine monitoring by satellites started, to 2023. Sea ice extent is defined as the area of ocean where at least 15 percent of the surface is frozen.
Arctic Sea Ice Extent | CMEMS - Copernicus
WEBThe Arctic sea ice extent decreased by 12.5% per decade from 1979 to 2021. Most of the Arctic sea ice is becoming seasonal and does not last from year to year, meaning it grows in the winter and melts in the summer. The fifteen lowest minimum Arctic sea ice extents have all been recorded since 2007.
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