Antarctic sea ice extent 2021

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Understanding climate: Antarctic sea ice extent NOAA

  1. Sea ice concentration is the percent areal coverage of ice within the data element (grid cell). Sea ice extent is the integral sum of the areas of all grid cells with at least 15% ice concentration, while sea ice area is the integral sum of the product of ice concentration and area of all grid cells with at least 15% ice concentration
  2. Antarctic sea ice extent for March 2021 was 4.45 million square kilometers (1.72 million square miles). The magenta line shows the 1981 to 2010 average extent for that month. Sea Ice Index data
  3. Antarctic Sea Ice Variability in the Southern Ocean-Climate System(2017) NASA Finds 2021 Arctic Winter Sea Ice Tied for 7th-Lowest on Record. Sea ice in the Arctic appears to have hit its annual maximum extent after growing through the fall and winter. This year's maximum extent peaked at 5.70 million square miles
  4. Figure 1 shows Antarctic sea ice extent from 1979, when routine monitoring by satellites started, to 2018. Sea ice extent is defined as the area of ocean where at least 15 percent of the surface is frozen. This threshold was chosen because scientists have found that it gives the best approximation of the edge of the ice

The annual cycle of Antarctic sea ice, oscillating from a mean winter extent of ~18.5 × 10 6 km 2 to a mean summer extent of ~3.1 × 10 6 km 2, exerts a strong control on Southern Ocean (SO. The Antarctic sea ice extent during April 2021 was 88,800 square miles (3.4 percent) above average and the largest April sea ice extent since 2016. Sea ice extent was below-average in the northwestern Weddell Sea and northern Ross Sea, where April temperatures were above average On February 21, 2021, Antarctic sea ice reached its annual minimum at 2.6 million square kilometers (1.0 million square miles), slightly below the 1981-2010 average of 2.8 million square kilometers. Interestingly, the minimum in late February was followed by a period of rapid freezing Antarctic sea ice peaks in September (the end of Southern Hemisphere winter) and usually retreats to a minimum in February. These image pairs show the average concentration of Antarctic sea ice for the month of September (left) and the following February (right) from September 1990 to February 2021

June 2021 Arctic Sea Ice News and Analysi

The increase in Antarctic sea ice between 2000 and 2014 accelerated to almost five times the rate observed between 1979 and 1999 12, culminating in a record high annual mean sea-ice extent (SIE. The Antarctic sea ice extent during March 2021 was 4.45 million square km (1.72 million square miles), which is 10.4%, or 420,000 square km (160,000 square miles), above average. This was the largest March Antarctic sea ice extent since 2015 and the tenth largest since records began in 1979 The Antarctic sea ice extent for May 2021 was above average at 10.33 million square km (3.99 million square mi)—the largest May sea ice extent since 2015. Overall, the May 2021 sea ice extent tied with 1998 and 2001 as the 16th largest May extent on record. According to the NSIDC, the Antarctic sea ice grew at a slightly below-average pace. On Sept. 19 this year, for the first time ever since 1979, Antarctic sea ice extent exceeded 7.72 million square miles (20 million square kilometers), according to the National Snow and Ice Data Center. The ice extent stayed above this benchmark extent for several days

Deciphering the rise and fall of Antarctic sea ice exten

  1. By analyzing levels of sea salt in an ice core from the South Pole, researchers now have a record of how Antarctic sea ice has ebbed and flowed every season for the past 11,000 years. Their findings show the band of ice encircling the continent has gradually expanded over the past 10,000 years, with one notable dip in sea ice extent between.
  2. sea ice; climate change; satellite Earth observations; climate trends; Antarctic sea ice; Since the late 1990s, it has been clear that the Arctic sea ice cover has been decreasing in extent over the course of the multichannel passive-microwave satellite record begun in late 1978 (1 ⇓ -3).The decreases have accelerated since the 1990s and have been part of a consistent suite of changes in.
  3. imum around the continent. Antarctic sea ice reached its annual maximum on September 28, 2020, when it spanned 18.95 million square kilometers (7.32 million square miles)
  4. Sea ice in the Arctic appears to have hit its annual maximum extent after growing through the fall and winter. The 2021 wintertime extent reached on March 21 ties with 2007's as the seventh-smallest extent of winter sea ice in the satellite record, according to scientists at the NASA-supported National Snow and Ice Data Center and NASA
  5. Feature | April 2, 2021 Dry Ice: How Expanding Antarctic Sea Ice is Drying the Atmosphere Over the Southern Ocean In this photo taken during a NASA IceBridge science flight off of the coast of Antarctica in fall of 2018, dry and cold winds blowing off the iceshelf over an opening in the sea ice (top of figure) cause evaporation from the ocean surface into the atmosphere, where low clouds form
  6. Sea ice Arctic sea ice winter peak in 2021 is joint-seventh lowest on record Arctic sea ice has reached its maximum extent for the year, peaking at 14.77m square kilometres (km2) on 21 March. This is the joint-seventh smallest winter peak - tied with 2007 - in a satellite record that spans more than four decades
  7. With the exception of last winter, when sea ice reached just 15.047 million square kilometers (5.8 million square miles), sea ice extent in March 2021 was significantly above recent warm years.

Briefing on Arctic and Antarctic sea ice - June 2021 - Met

Antarctic sea ice extent are characterized by fairly large variations from year to year. The monthly average extent can vary by as much as 1 million square kilometers (386,102 square miles) from the year-to-year monthly average. <p><p>The AMSR-E instrument on the Aqua satellite acquires high resolution measurements of the 89 GHz brightness. South Pole Ice Core Reveals History of Antarctic Sea Ice 12 May 2021. Tracking seasonal changes in sea ice over millennia can give the extent of summer or winter sea ice from times before. Both Arctic and Antarctic sea ice extent are characterized by fairly large variations from year to year. The monthly average extent can vary by as much as 1 million square kilometers (386,102 square miles) from the year-to-year monthly average. The area covered by Antarctic sea ice has shown a small increasing trend Satellite measurements show the average annual sea ice extent in the Arctic has declined by 3.5% to 4.1% per decade since 1979. The summer extent has decreased by 9.4% to 13.6% per decade. In Antarctica the changes have been much more subtle and regionally variable. The western Antarctic Peninsula region has shown a decline in sea ice extent.

NASA Finds 2021 Arctic Winter Sea Ice Tied for 7th-Lowest

  1. Sea ice in the Antarctic showed a slight increase in overall extent from 1979 to 2014, although some areas, such as that to the west of the Antarctic Peninsula experienced a decrease. Short-term trends in the Southern Ocean, such as those observed, can readily occur from natural variability of the atmosphere, ocean and sea ice system
  2. Figures 3 and 4 provide plots of the trends in the Arctic and Antarctic sea ice extents, along with monthly deviations and 12-month running means. The monthly deviations are calculated by taking the individual month's ice extent/area and subtracting from it the average over the course of the data set of the extents/areas for that month
  3. g trend during the past half-century. In addition, a statistically significant anticorrelation between air temperatures and sea-ice extent, as deter
  4. Climate Change Indicators: Arctic Sea Ice. This indicator tracks the extent, age, and melt season of sea ice in the Arctic Ocean. Figure 1. March and September Monthly Average Arctic Sea Ice Extent, 1979-2020. This figure shows Arctic sea ice extent for the months of September and March of each year from 1979 through 2020
  5. Andrew Freedman. Feb. 26, 2021 at 5:25 p.m. UTC. Share. Comment. A large iceberg about 20 times the size of Manhattan broke off the Brunt Ice Shelf in the Weddell Sea section of Antarctica during.

Updated Mar. 19, 2021 12:13 PM PDT. Copied. The National Snow and Ice Data Center (NSIDC) has released the latest 30-year climatology of the daily median Arctic sea ice extent for the calendar. Features. This app displays the monthly mean sea ice extent for the Arctic and Antarctic along with the historical median extent. Additionally, graphs are used to visualize the minimum and maximum extent for each year (top), and the monthly time series for each year (bottom). Use the top graph to select specific years to display in the map

Sea ice extent around Antarctica on September 26. Yellow line shows median September sea ice extent from 1979 to 2000 In contrast to the Arctic, sea ice around the Antarctic had been increasing in extent since the 1970s, but then rapidly decreased to record low levels, with the greatest decline in the Weddell Sea Average Arctic sea ice volume in May 2021 was 21,500 km 3. This value is the 7th lowest on record for May about 1,700 km^3 above the record set in 2017. Monthly ice volume was 38% below the maximum in 1979 and 25% below the mean value for 1979-2020. Average May 2021 ice volume was 1 sigma above the 1979-2020 trend line

Antarctic sea ice extent simulated by the CMIP5 climate models. Credit: Eayrs et al. [2019] , Figure 7 On the whole, climate models do a reasonable job of capturing the seasonal cycle of Antarctic. Furthermore, our newly developed Climatological Sea Ice Anomaly Index (CSIAI) highlighted the particular years of anomalous Antarctic sea ice variability (Figure 5). Both the phenomenon of the ADP and years of extreme sea ice extent (max. SIE in 2014, min. SIE in 2017) were reliably identified by the CSIAI Oct 7, 2014: Sea ice surrounding Antarctica reached a new record high extent this year, covering more of the southern oceans than it has since scientists began a long-term satellite record to map sea ice extent in the late 1970s. The upward trend in the Antarctic, however, is only about a third of the magnitude of the rapid loss of sea ice in the Arctic Ocean Data: The Paris Climate Agreement and future sea-level rise from Antarctica; Table: Axios VisualsSea-level rise from glaciers and ice sheets is closely tied to the pace and extent of global warming during the next several decades, data from two major new ice melt studies show.Between the lines: Coastal communities might be able to adapt to the sea-level rise contribution from Antarctica alone. The sea ice cover of the Southern Ocean reached its yearly maximum extent on Oct. 6. At 7.27 million square miles (18.83 million square kilometers), the new maximum extent falls roughly in the middle of the record of Antarctic maximum extents compiled during the 37 years of satellite measurements - this year's maximum extent is both the 22nd lowest and the 16th highest

Current State of Sea Ice Cover Eart

While ice cover in the Arctic continues its downward spiral, something counterintuitive is happening in the Antarctic.. The thin crust of sea ice floating around Antarctica expanded this year to. For example, in recent years, the Arctic's ice extent has dropped from yearly peaks of around 14-15 million sq km. to lows of around 4-5 million sq. km, while the Antarctic's sea ice extent. Arctic sea ice loss is matched by Antarctic sea ice gain. In fact, the global sea-ice record shows virtually no change throughout the past 30 years, because the quite rapid loss of Arctic sea ice since the satellites were watching has been matched by a near-equally rapid gain of Antarctic sea ice. Indeed, when the summer extent of Arctic sea. The extent of sea ice in the Antarctic increased above the 1981-2010 average for the first time in four years. It came dangerously close to the 2017 levels (a standout year with record minimums. The relationship between changes in sea ice drift and changes in sea ice area extent is not well understood. Climate models simulate processes in the oceans and atmosphere with specified atmospheric carbon dioxide levels and other factors, to characterize how Earth systems may interact and change in the future

April 2021 Arctic Sea Ice News and Analysi

Our study will open a hitherto unexplored direction and motivate the science community to study the large effects that Antarctic sea ice loss will have on the climate system. The years 2017 and 2018 set records for minimum sea ice extent in Antarctica The product has two primary components: (1) total sea ice extent and sea ice area values, and (3) images of sea ice concentration, extent, trends, and anomalies. Concentration is the percent coverage of ice within each grid cell. Extent is the total area covered by at least 15% concentration of ice

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October 9, 2014. Scientists first started routinely tracking the sea ice that surrounds Antarctica in 1979, and of all the years since, none had a higher sea ice extent than this one. According to. The National Snow and Ice Data Center reported that as of Sept. 19, for the first time since 1979, Antarctic sea ice extent exceeded 7.72 million square miles. The average maximum extent between. Introduction. Most Antarctic apex predators breed during the austral spring in the Southern Ocean, the start of which in September is also the month of maximum ice extent around Antarctica (Gloersen et al., Reference Gloersen, Campbell, Cavalieri, Comiso, Parkinson and Zwally 1993).The ice-covered ocean is difficult to access for ship- and helicopter-based surveys This winter, the maximum total Antarctic sea ice extent was reported to be 19.47 million square kilometres, which is 3.6% above the winter average calculated from 1981 to 2010

Antarctic sea ice melts during the early part of the year but typically packs it back on by September. The ice broke last year's record for extent on Monday, according to a report in New Scientist Antarctic sea ice extent reached a record high this year on 22 September, topping 20 million square kilometers for the first time since 1979, according to the National Snow and Ice Data Center

Arctic sea ice extent reached its lowest point this year on September 16, 2012 when sea ice extent dropped to 3.41 million square kilometers (1.32 million square miles) Measurement of sea ice is important for safety of navigation and for monitoring the environment, particularly the climate.Sea ice extent interacts with large climate patterns such as the North Atlantic oscillation and Atlantic Multidecadal Oscillation, to name just two, and influences climate in the rest of the globe.. The amount of sea ice coverage in the arctic has been of interest for. Extent. The Antarctic sea ice cover is highly seasonal, with very little ice in the austral summer, expanding to an area roughly equal to that of Antarctica in winter.It peaks (~18 × 10^6 km^2) during September, which marks the end of austral winter, and retreats to a minimum (~3 × 10^6 km^2) in February Over the last few years, Antarctic sea ice coverage has rapidly declined ( Climatewire, July 2, 2019). What that means for the Southern Ocean carbon sink is still unclear. Some research has. Antarctic researchers ponder challenges posed by increasing sea ice By Dennis Normile May. 11, 2015 , 1:00 PM Scientists working in Antarctica are feeling the impact of climate change in ways the.

At the other end of the world, Antarctic sea ice is approaching its winter maximum, which occurs a few weeks later. Extent there is looking like the highest since 2014's satellite-era record and. There is currently less sea ice surrounding the Antarctic continent than at any point since reliable records began in 1979. As of Tuesday, it looks like we hit a new record low in the satellite. Any day now, Arctic sea ice is expected to bottom out at its sixth lowest extent on record reports the National Snow and Ice Data Center (NSIDC). Its 2014 extent is roughly 440,000 square miles. In fact, each year from 2012 through 2014 reached a record high for Antarctic sea ice extent. Skeptics have long pointed to ice gain in the Southern Hemisphere as evidence climate change wasn't. Antarctic polar ice extent has set another new record, defying alarmist global warming claims. Surpassing the greatest month-of-April ice extent in recorded history, the new record throws cold.

Climate Change Indicators: Antarctic Sea Ice Climate

  1. Antarctic sea ice shrinks to record low. The extent of sea ice around Antarctica hit a new low in January, bucking an overall growing trend since recordkeeping began in 1979
  2. Polar Chill Grips New Zealand + Antarctic Sea Ice Extent Holding Above 1979-1990 Average April 28, 2021 April 28, 2021 Cap Allon Winter is arriving early across New Zealand, particularly in the South Island where well-below average temperatures and even a dusting of out-of-season snow have set in
  3. In May 2021, Antarctic sea ice extent was very close to the 1991-2020 average, at 10.4 million km 2 on average, less than 0.1 million km 2 below the average for May. Following five years of below average May anomalies (especially large between 2017 and 2019), 2021 is the first May with a close-to-average value
  4. The more rugged Amundsen Sea continental shelf contains the earth's fastest melting ice shelves, which Holland et al (2019) show can be linked to decadal-scale variability in the tropical Pacific, and Jacobs et al. (2021) document as being the primary influence on freshening downstream in the Ross Sea
  5. Compare Maps of Arctic Sea Ice Extent Side-by-Side. The maps below show the extent of sea ice in the Northern Hemisphere around the North Pole. Select a month and year from the popup menus to compare two maps side-by-side. Try this: compare the sea ice in March and September for the same year. compare the sea ice in March for two different years

On Sept. 19, 2014, the five-day average of Antarctic sea ice extent exceeded 20 million square kilometers for the first time since 1979, according to the National Snow and Ice Data Center Antarctic sea ice extent for March 3, 2017 was 2.11 million square kilometres. The orange line shows the 1981 to 2010 median extent for that day. by Sophie Vorrath on 24 June 2021 Declining Antarctic sea ice extents were a cornerstone of climate models - unless they began increasing. It may be that both are just natural fluctuation according to a new paper which shows that the negative phase of the Interdecadal Pacific Oscillation (IPO), which is characterized by cooler-than-average sea surface temperatures in the tropical eastern Pacific, has created favorable. A NASA video shows the evolution of the sea ice cover of the Southern Ocean from its minimum yearly extent to its peak extent. The growth of Antarctic sea ice was erratic this year Antarctic sea ice has declined rapidly since 2014, after almost four decades of growth, according to a new study that looked at 40 years of satellite data

The earliest satellite maps of Arctic and Antarctic sea-ice have been assembled by scientists. They were made using data from Nasa's Nimbus-1 spacecraft, which was launched in 1964 to test new. The amount of sea ice in the Arctic and Antarctic can be measured using sea ice 'extent' - the total area of ocean for which at least 15% of the surface in the immediate vicinity is ice-covered. Sea ice extent is not constant throughout the year; sea ice grows and melts in response to the changing season s. Arctic sea ice normally reaches a. September's record-breaking Antarctic sea ice extent. Click image to enlarge. Credit: NOAA climate.gov. That extreme rate of sea level rise is unlikely to play out again in any kind of foreseeable. My investigation into the deceptions involved reveals the full extent of Attenborough's journey to noble cause corruption, ( See March 2021 Ocean Chill Deepens) Sea Ice Extent (Global Antarctic and Arctic) - Day 171 - 2021. Posted on June 22, 2021 by HiFast. sunshine hours

The overall sea ice loss for the planet is about 13,500 square miles per year from 1979 to 2013. Trends in sea ice extent, or area, in the Arctic, Antarctic and globally. Click image to enlarge. 2021 - 2021 795.0 m Antarctic This is 750m VIIRS sea ice thickness for the Antarctic from the NOAA S-NPP satellite. Near-real-time daily data and 4-day composites are available for the past 3 weeks. Gridded Sea Ice Extent and Concentration 1850-Onward from NSIDC. 1850 - 201 Six years ago, experts from 36 research institutes began an extensive comparison of their simulations for the Greenland and Antarctic Ice Sheets, and calculated (for two different climate scenarios) the extent to which melting on the sheets would affect global sea-level rise from 2015 to 2100

The Arctic and the Antarctic are regions that have a lot of ice and act as air conditioners for the Earth system. This year, Antarctic sea ice reached a record maximum extent while the Arctic. The hydrofracture process has been implicated in the collapse of smaller ice shelves in the Antarctic Peninsula, where meltwater forms on the surface of ice shelves during austral summer, but it is not often seen driving through ice as thick as the 1400 meters (4,590 feet) at this location on Amery Ice Shelf Classroom Antarctica is a comprehensive online teaching resource with lesson plans aimed at grades 3 to 8. Keep up to date with the latest news, events and activities in Antarctica with our e-newsletter, Antarctic Insider. The official magazine detailing the activities of the Australian Antarctic program Algorithms for estimating sea-ice extent from remotely sensed microwave sensor data can benefit from knowledge of the a priori distribution of the daily expansion and contraction of the sea-ice pack. To estimate the probability distribution of daily Antarctic sea-ice extent change, two independent sea-ice datasets are analyzed: sea-ice extent derived from the QuikSCAT scatterometer and ice.

RELATED Antarctic sea ice extent sets record low Video returned by the geologists was turned over to a team of marine biologists, including Griffiths, who specialize in studying harsh polar. After three record-high extent years, this year marks a return toward normalcy for Antarctic sea ice. At maximum on October 6, Antarctic sea ice extent measured 7.27 million square miles (18.83.

The ice extent in the Antarctic sea has hit an all-time low, according to researchers after studying the data collected by the US National Snow and Ice Data Centre This past September, at the end of the Southern Hemisphere's winter, the extent of Antarctica's sea ice reached 19.51 million square kilometers, breaking a 35-year record that dated back to. The agency's Antarctic Sea Ice chart (shown below) reveals that this year's extent has been on turbo charge since early February. And now, as of May 10 or day 130, extent is tracking comfortably above the 1979 to 1990 average The Collapse of a Key Antarctic Ice Shelf is Accelerating. New research shows that the ice shelf that forms a buttress against the flow of one of Antarctica's major ice sheets to the ocean is collapsing at an accelerating rate. The future of the Ice Sheet that is key to holding back one of the fastest moving glaciers in Antarctica has been up.

New Year Antarctic sea ice coverage at lowest sinceArctic sea ice extent drops to 2nd lowest minimum on

Multi-decadal trends in Antarctic sea-ice extent driven by

Sea-level rise from glaciers and ice sheets is closely tied to the pace and extent of global warming during the next several decades, data from two major new ice melt studies show.. Between the lines: Coastal communities might be able to adapt to the sea-level rise contribution from Antarctica alone through 2100 at lower warming scenarios. However, there would be big increases in that sea. Since 2014, Antarctic sea ice extent has plummeted, on average losing an area of ice (280,000 square miles) larger than the size of France each year Following the collapse of grounded ice in marine-based sectors of the West Antarctic Ice Sheet (WAIS), viscoelastic crustal rebound will steadily reduce the volume of the accommodation space for meltwater from the retreating ice sheet and thus increase the total global mean sea level (GMSL) rise within the open ocean (9-14) Global warming is expanding the extent of sea ice around Antarctica in winter in a paradoxical shift caused by cold plumes of summer melt water that re-freeze fast when temperatures drop, a study.

Assessing the Global Climate in April 2021 News

Antarctic sea ice increased slightly in 2018, but still was the second-lowest since 1979. Even though ice is growing this time of year in Antarctica, levels in the last two months were the lowest. The Ross Sea, which faces New Zealand, has seen a dramatic increase in peak ice extent and 80 more days of ice cover since 1979, when satellites began tracking changes

Sea Ice Highs and Lows - NASA Earth Observator

The map shows the average sea ice extent for Oct. 2020 (white), measuring 5.28 million sq km against the 1981-2010 October average (yellow line). The Oct. 2020 extent was 3.07 million sq km lower. 470. 470. Groundbreaking 3D mapping of previously inaccessible areas of the Antarctic has found that the sea ice fringing the vast continent is thicker than previous thought. Two expeditions to. Both the Arctic and Antarctic experienced record lows in sea ice extent in November, with scientists astonished to see Arctic ice actually retreating at a time when the region enters the cold darkness of winter. (The Guardian) (National Snow & Ice Data Center) The common denominator between the Arctic and Antarctic record minimum sea ice extent this Fall is the wind: together with a. That fact alone is the key as to why these two parts of the globe are subject to different sea-ice-forming and sea-ice-melting meteorological processes. Extent of Arctic sea ice on September 17, 2014 The existing Antarctic ice sheet is considered the biggest block of ice on Earth, thereby encompassing over 14 million square kilometers. Once the ice sheet melts, the sea levels would increase by around 60 m. Earth Day 2021: Remote Islands Shed Light on the Extent of Worldwide Plastic Pollution. Emma Nichols

Rise in sea level from ice melt in Greenland and

Guest post: Deciphering the rise and fall of Antarctic sea

Increased growth in Antarctic sea ice during the past 30 years is a result of changing weather patterns caused by the ozone hole according to new research published this week Antarctic sea ice is poised to set a record maximum this year, now at 7.6 million square miles and continuing to increase, the ice center noted on its website. Sea ice data goes back to 1979.


World of Change: Antarctic Sea Ice - NAS

Antarctic sea ice had been slowly increasing during the 40 years of measurements and reached a record maximum in 2014. But since then sea ice extent has nosedived, reaching a record low in 2017 Antarctic sea ice at its peak extent can cover 20 million square km; the research team on the other hand looked at just six small boxes some 500m along the square

Rapid decline in Antarctic sea ice in recent years hints

Arctic sea ice extent eighth lowest on record, says NASA - At 4.64 million square kilometres, this year's Arctic sea ice minimum extent is the eighth lowest in the consistent long-term satellite record, which began in 1978, NASA's satellite data analysis shows. Arctic sea ice appeared to have reached its yearly lowest extent on September 13, the US space agency said Antarctic sea ice loss is good news for the continent's penguins Researchers had previously illuminated a link between sea ice extent in Antarctica and breeding success among Adelie penguin. Antarctic penguins are 'happier with less sea ice', scientists find. Adelie penguins are pretty slow waddlers overland and can access food more easily in ice-free conditions, say researchers Sedimentation of 13C-rich organic matter from Antarctic sea-ice algae: A potential indicator of past sea-ice extent. Geology, 1999. Andrew McMinn. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. Academia ©2021.

January | 2021 | Arctic Sea Ice News and Analysis