Sentences with phrase «average sea ice extent of»

The extraordinary 2012 Arctic sea ice melt has resulted in a September average sea ice extent of 3.61 million sq km, according to the latest monthly data from the National Snow and Ice Data Center (NSIDC), smashing the previous record of 4.30 million sq km set in 2007.

NMEFC of China (Li and Li), 4.02 (3.10 - 4.57), Statistical We predict the September monthly average sea ice extent of Arctic by statistic method and based on monthly sea ice concentration and extent from National Snow and Ice Data Center.

Li and Li (NMEFC), 5.48 (4.97 - 5.98), Statistical We predict the September monthly average sea ice extent of Arctic by statistic method.

Not exact matches

We have much better — and more conclusive — evidence for climate change from more boring sources like global temperature averages, or the extent of global sea ice, or thousands of years» worth of C02 levels stored frozen in ice cores.

Substantial reductions in the extent of Arctic sea ice since 1978 (2.7 ± 0.6 percent per decade in the annual average, 7.4 ± 2.4 percent per decade for summer), increases in permafrost temperatures and reductions in glacial extent globally and in Greenland and Antarctic ice sheets have also been observed in recent decades.

The annual average extent of Arctic sea ice is currently declining at about half a million square kilometres per decade — equivalent to about twice the area of the UK.

This image shows a visualization of Arctic sea ice cover on Sept. 12, 2013, with a yellow line showing the 30 - year average minimum extent.

The Arctic's sea ice maximum extent has dropped by an average of 2.8 percent per decade since 1979, the year satellites started measuring sea ice.

But over the past decades, the melt season has grown longer and the average extent of Arctic sea ice has diminished, changing the game for many Arctic marine mammals — namely beluga, narwhal and bowhead whales; ringed, bearded, spotted, ribbon, harp and hooded seals; walruses; and polar bears.

A composite image shows how the extent of Arctic sea ice in September 2016 compared with a 30 - year average for the month (yellow line).

Satellites show the extent of Arctic sea ice on Sept. 16, 2012 as compared to the average minimum from the past 30 years (yellow line).

Through satellite images, researchers have observed a steep decline in the average extent of Arctic sea ice for every month of the year.

Extent of Arctic sea ice in September 2016 versus the 1981 - 2010 average minimum extent (gold Extent of Arctic sea ice in September 2016 versus the 1981 - 2010 average minimum extent (gold extent (gold line).

August Arctic sea ice extent is decreasing at an average rate of 10.2 percent per decade.

July Arctic sea ice extent is decreasing at an average rate of 7.3 percent per decade.

Arctic sea ice extent was below normal for the 11th consecutive April this year, covering an average of 5.7 million square miles (14.7 million square kilometers) 2.1 percent below the 1979 - 2000 average extent and the 15th smallest April extent since records began in 1979.

Current predictions [5], [6] suggest that trends in sea ice extent will alter in the second half of this century and that the annual average sea ice extent will diminish by 33 %; most of this retreat is expected to occur in winter and spring [5], [6], with attendant risks for emperor penguins.

There was a USGS 2010 paper by D Douglas that predicted «For the Bering Sea, median March ice extent is projected to be about 25 percent less than the 1979 — 1988 average by mid-century and 60 percent less by the end of the century» But if Bering ice is driven by the PDO I suspect that prediction will fail.

If you plot the average Arctic Sea Ice extent for 20 years, the you should also plot the monthly maximum and minimum values on the same figure so that we can get some perspective on where the 2007 and 2008 data falls in the context of annual variability, or examine for trends.

There was a USGS 2010 paper by D Douglas that predicted «For the Bering Sea, median March ice extent is projected to be about 25 percent less than the 1979 — 1988 average by mid-century and 60 percent less by the end of the century» But if Bering ice is d»

The graph below (high - resolution copy) shows the range of the forecasts for early September, the point when the sea ice typically reaches its minimum extent, compared to recent years and the average over the period of precise satellite measurement.

Overall, sea ice extent declined at a slightly slower rate than normal (relative to the 1981 - 2010 average rate) during June (Figure 6), losing a total of 1.6 million km2 as noted in NSIDC's Arctic Sea Ice News and Analysis reposea ice extent declined at a slightly slower rate than normal (relative to the 1981 - 2010 average rate) during June (Figure 6), losing a total of 1.6 million km2 as noted in NSIDC's Arctic Sea Ice News and Analysis repoice extent declined at a slightly slower rate than normal (relative to the 1981 - 2010 average rate) during June (Figure 6), losing a total of 1.6 million km2 as noted in NSIDC's Arctic Sea Ice News and Analysis repoSea Ice News and Analysis repoIce News and Analysis report.

The predicted September monthly average sea ice extent is 5.48 (4.97 - 5.98) million km2 which is same to the result of June Report.

Sea ice extent was below average in the Barents Sea on the Atlantic side of the Arctic.

Why, because the current sea ice extent is already lower than the average minimum for the decade of the 90s?

As of September 5, sea ice extent remains below average everywhere except for a small area within the Laptev Ssea ice extent remains below average everywhere except for a small area within the Laptev SeaSea.

bozzza @ 424, For one theory see: http://forum.arctic-sea-ice.net/index.php/topic,724.msg60178.html#msg60178 I believe that the current downward fluctuation in Antarctic Sea Ice Extent if likely associated with the influence of our currently strong El Nino on the average location of the Amundsen Bellingshausen Sea Low.

Canadian Ice Service, 3.8, Heuristic Arctic Ocean September sea ice extents (while expected to be well below the 1979 ‐ 2013 average of 6.4 million square kilometres, and while expected to continue to be near or below 4.0 million square kilometres) are therefore expected to experience a slight recovery, preventing a repeat of last year's recoIce Service, 3.8, Heuristic Arctic Ocean September sea ice extents (while expected to be well below the 1979 ‐ 2013 average of 6.4 million square kilometres, and while expected to continue to be near or below 4.0 million square kilometres) are therefore expected to experience a slight recovery, preventing a repeat of last year's recoice extents (while expected to be well below the 1979 ‐ 2013 average of 6.4 million square kilometres, and while expected to continue to be near or below 4.0 million square kilometres) are therefore expected to experience a slight recovery, preventing a repeat of last year's record.

In both the Arctic and the Antarctic «natural causes» (the seasons) are responsible for the seasonal decrease / increase in sea ice extent, which are, of course, much larger than the average annual change.

Not only that, the extent of Arctic sea ice in February was 7.54 percent below the 1981 — 2010 average, and the lowest since record - keeping started in 1979.

Millions of square kilometers sea ice extent Month — last 5 years — baseline End July — 8.73 — 10.10 End Aug — 6.04 — 7.67 End Sep — 5.02 — 7.04 Average — 6.60 — 8.27 Difference 1.67 million square kilometers (msk) Cumulated loss = 20 %

What is also stunning are sea - ice daily extent figures averaging ice loss of more than 100,000 square kilometres per day for the last four days.

For the month of November, the Arctic sea ice extent averaged 9.08 million square kilometers, which is 1.95 million square kilometers below the recorded 1981 to 2010 long - term average for the said month.

Predictions, an early baby El Nino this coming year, 2014, will fade and 2014 will be the 9 nth coldest of recent years Arctic Sea Ice extent will speed up in the coming months and go through the average to record a positive anomaly within 12 weeks.

The figure below shows the average Arctic sea ice extent for each week of the year for every year between 1978 and 2017.

The so - called minimum sea - ice extent in «07 was at that time the lowest since satellite monitoring began in 1979, covering an average of 1.65 million square miles.

Satellite observations indicate that the average Arctic sea ice extent has generally decreased since the start of the satellite records in October 1978.

Much has been made of the fact that the April 2010 sea ice extent data released by the National Snow and Ice Data Center (NSIDC) were near the long - term climatological average (Figure ice extent data released by the National Snow and Ice Data Center (NSIDC) were near the long - term climatological average (Figure Ice Data Center (NSIDC) were near the long - term climatological average (Figure 4).

Last winter, sea ice extent was on the low side, but the melting trajectory looks pretty average for the decade of the 2000's.

The first half of 2017 has seen record low sea ice extents at both poles and near - record global average temperatures — despite the absence of a...

The total extent of the Arctic sea ice reached 5.59 million square miles, which is about 450,000 square miles less than the average and 20,000 square miles more than 2017.

Animation of changes in average September sea ice extent from 1979 through 2016 — with noteworthy natural variability and a long - term decline.

This time series of daily global sea ice extent (Arctic plus Antarctic) shows global extent tracking below the 1981 to 2010 average.

However, the pace of decline returned to near - average rates by July, and the end - of - summer minimum sea ice extent, recorded on September 10, eventually tied for second lowest with 2007 (2012 remains the lowest in the satellite time series by more than 600,000 square kilometers or 232,000 square miles).

Stern: My estimate for September average sea ice extent (4.67 million square kilometers) was simply based on extrapolation of the 10 - year trend (1989 - 2008).

The average arctic sea ice monthly extent for September 2012 was the lowest observed in the satellite era at 3.6 million square kilometers, based on National Snow and Ice Data Center (NSIDC) estimates — 50 % lower than the 1979 - 2000 average of 7.0 million square kilometeice monthly extent for September 2012 was the lowest observed in the satellite era at 3.6 million square kilometers, based on National Snow and Ice Data Center (NSIDC) estimates — 50 % lower than the 1979 - 2000 average of 7.0 million square kilometeIce Data Center (NSIDC) estimates — 50 % lower than the 1979 - 2000 average of 7.0 million square kilometers.

In the Southern Hemisphere, overall sea ice extent shifted from near - average over the first half of the year to sharply below average in mid-August.

This reflects a December pattern of faster - than - average growth in the Arctic, and slightly slower - than average sea ice extent decline in the Southern Ocean.

NSIDC is transitioning the sea ice extent time series graphs to show interquartile and interdecile ranges, with the median extent value, in place of standard deviations and the average values.

Thus, when sea ice is retreating or advancing at a high rate over the course of the month, as was the case for December 2016, the Sea Ice Index monthly average can yield a larger extent than from simply averaging daily extent valusea ice is retreating or advancing at a high rate over the course of the month, as was the case for December 2016, the Sea Ice Index monthly average can yield a larger extent than from simply averaging daily extent valuice is retreating or advancing at a high rate over the course of the month, as was the case for December 2016, the Sea Ice Index monthly average can yield a larger extent than from simply averaging daily extent valuSea Ice Index monthly average can yield a larger extent than from simply averaging daily extent valuIce Index monthly average can yield a larger extent than from simply averaging daily extent values.