Sentences with phrase «annual sea ice extent»

«Regarded as one of the world's most productive marine environments, the Bering Sea is widely thought to be rapidly warming and losing sea ice... Results show that, rather than declining, mean annual sea ice extent in the Bering Sea has exhibited no significant change over the satellite sea ice record (1979 — 2009).

Average annual sea ice extent in both polar regions was low in 2016.

When averaging daily data from the National Snow and Ice Data Center, and noting that there was an unanticipated sensor transition during the year, the estimated average annual sea ice extent in the Arctic was approximately 3.92 million square miles, the smallest annual average in the record.

Not exact matches

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.

In Antarctica, this year's record low annual sea ice minimum of 815,000 square miles (2.11 million square kilometers) was 71,000 square miles (184,000 square kilometers) below the previous lowest minimum extent in the satellite record, which occurred in 1997.

The area of the Arctic Ocean covered by sea ice in September, when the annual minimum occurs, was the sixth lowest extent in the satellite record, going back to 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.

On September 10, Arctic sea ice reached its annual minimum extent at 1.60 million square miles, statistically tying 2007 as the second smallest extent in the 1979 — 2016 satellite record, according to the National Snow and Ice Data Centice reached its annual minimum extent at 1.60 million square miles, statistically tying 2007 as the second smallest extent in the 1979 — 2016 satellite record, according to the National Snow and Ice Data CentIce Data Center.

On August 31, the Antarctic sea ice reached its annual maximum extent at 7.12 million square miles.

We have just passed the annual maximum in Arctic sea ice extent which always occurs sometime in March.

After that, the sea ice will begin its course towards its annual minimum of both extent and volume in mid-September.

I have often used quadratic fits of annual minimum Arctic sea ice extent to forecast the future value.

This marks the beginning of the ritual of the annual sea ice watch that includes predictions of the extent and rank of this year's sea ice minimum, as well as discussion about the timing of its eventual demise.

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.

Published trends in peer - reviewed articles on Antarctic sea ice extent (all on annual average extent):

ScienceDaily (Oct. 3, 2008)-- Arctic sea ice extent during the 2008 melt season dropped to the second - lowest level since satellite measurements began in 1979, reaching the lowest point in its annual cycle of melt and growth on Sept. 14, according to researchers at the University of Colorado at Boulder's National Snow and Ice Data Center.&raqice extent during the 2008 melt season dropped to the second - lowest level since satellite measurements began in 1979, reaching the lowest point in its annual cycle of melt and growth on Sept. 14, according to researchers at the University of Colorado at Boulder's National Snow and Ice Data Center.&raqIce Data Center.»

In March 2017, the annual maximum extent of Arctic sea ice hit a record low for the third straight year, according to the US National Snow and Ice Data Centice hit a record low for the third straight year, according to the US National Snow and Ice Data CentIce Data Centre.

Ice around Iceland (the number of weeks when ice was observed in this case) must correlate very well with the arctic sea ice extent / area, at least with the annual maximIce around Iceland (the number of weeks when ice was observed in this case) must correlate very well with the arctic sea ice extent / area, at least with the annual maximice was observed in this case) must correlate very well with the arctic sea ice extent / area, at least with the annual maximice extent / area, at least with the annual maximum.

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.

The paper actually talks about total snowfall, not extent and it does point out that it is autumn sea ice extent that is the important factor, whereas Willis has looked at total annual sea ice area and snow extent as opposed to total fall.

Tagged annual summer minimum, arctic sea ice, Beaufort Sea, body condition, Cherry, Chukchi, declining sea ice, Eastern Beaufort, good news, heavy sea ice, Hudson Bay, ice - free Arctic, litter size, loss of summer ice, Pilfold, polar bear, record low, Regehr, ringed seals, Rode, sea ice extent, Southern Beaufort, Stirling, summer ice minimum, summer sea ice, thick spring sea ice, Beaufort Sea, body condition, Cherry, Chukchi, declining sea ice, Eastern Beaufort, good news, heavy sea ice, Hudson Bay, ice - free Arctic, litter size, loss of summer ice, Pilfold, polar bear, record low, Regehr, ringed seals, Rode, sea ice extent, Southern Beaufort, Stirling, summer ice minimum, summer sea ice, thick spring Sea, body condition, Cherry, Chukchi, declining sea ice, Eastern Beaufort, good news, heavy sea ice, Hudson Bay, ice - free Arctic, litter size, loss of summer ice, Pilfold, polar bear, record low, Regehr, ringed seals, Rode, sea ice extent, Southern Beaufort, Stirling, summer ice minimum, summer sea ice, thick spring sea ice, Eastern Beaufort, good news, heavy sea ice, Hudson Bay, ice - free Arctic, litter size, loss of summer ice, Pilfold, polar bear, record low, Regehr, ringed seals, Rode, sea ice extent, Southern Beaufort, Stirling, summer ice minimum, summer sea ice, thick spring sea ice, Hudson Bay, ice - free Arctic, litter size, loss of summer ice, Pilfold, polar bear, record low, Regehr, ringed seals, Rode, sea ice extent, Southern Beaufort, Stirling, summer ice minimum, summer sea ice, thick spring sea ice extent, Southern Beaufort, Stirling, summer ice minimum, summer sea ice, thick spring sea ice, thick spring ice

After an unusually cool summer in the northernmost latitudes, Arctic sea ice appears to have reached its annual minimum extent on September 13, 2013.

According to the National Snow and Ice Data Center (NSIDC, Sept. 20 report), the annual sea ice minimum extent was reached on Sept. 13, 20Ice Data Center (NSIDC, Sept. 20 report), the annual sea ice minimum extent was reached on Sept. 13, 20ice minimum extent was reached on Sept. 13, 2013.

Figure 8: NSIDC annual NH sea ice extent and polynomial fit (red) vs. the GFDL annual NH sea ice extent model and polynomial fit (blue) from 1979 through 2011.

Annual Antarctic sea ice extent (total area of at least 15 % ice concentration) for selected years since 1979.

Here is the rate of change in sea ice extent filtered with 182 day gaussian to remove the annual cycle.

Annual average Arctic sea ice extent was the flavour du jour in certain quarters not so very long ago.

The criterion adopted here for having sufficiently removed the short term variability in order to get a stable estimation of the turning point (minimum sea - ice extent) of the annual cycle, was that there shall be only one change of direction.

Resources [1] The NH sea - ice extent data are provided by NSIDC as daily anomalies form an average cycle plus the annual cycle which has been subtracted.

There is a clear non linear nature to the variation in the timing of the annual minimum in Arctic sea - ice extent from NSIDC.

So an increased GHG effect should manifest in the polar regions in a decrease in winter sea ice extent and a smaller increase in summer sea ice extent relative to the winter maximum extent (ie a smaller annual range in sea ice extent).

After reaching its annual peak extent at the end of winter, Arctic sea ice contracts as temperatures rise through spring and summer.

Figure 4: Arctic sea ice reached its lowest annual extent — the absolute minimum — on September 15, 2007.

I wonder if the Fourier method of harmonics breakdown would have any practical use in analyzing the annual Arctic sea ice extent cycle and its (future) deviations.

The bright white central mass shows the perennial sea ice, which is just the multi-year ice that has survived at least one summer, while the larger light blue area shows the full extent of the winter sea ice including the average annual sea ice during the 2012 months of November, December and January.

What the report says about sea ice and climate change: Since the early 1980s, annual average Arctic sea ice has decreased in extent between 3.5 percent and 4.1 percent per decade, become 4.3 to 7.5 feet (1.3 and 2.3 meters) thinner.

The annual Arctic sea ice extent decreased over the period 1979 — 2012 by between 3.5 and 4.1 % per decade.

Satellite data since 1978 show that annual average arctic sea ice extent has shrunk by 2.7 [2.1 to 3.3] % per decade, with larger decreases in summer of 7.4 [5.0 to 9.8] % per decade.

«Based on a new analysis of passive microwave satellite data, we demonstrate that the annual mean extent of Antarctic sea ice has increased at a statistically significant rate of 0.97 % dec - 1 since the late 1970s.»

Arctic sea ice reached its maximum annual extent on March 21, and the amount measured was the fifth - lowest level ever recorded.

NOAA@NSIDC is pleased to announce that the Google Earth animation for the maximum annual Arctic sea ice extent has been updated.

I think Crispwell was referring to the Antarctic sea ice which is growing a slightly larger annual extent which is a little odd when you consider the globe is warming.

The Arctic sea ice extent undergoes a pronounced annual cycle, with maximum extent of about 14 M sq km in March.

An anthropogenic signal is detected in Arctic Sea Ice Extent (SIE) with all ensembles for the annual time series and also for September and March separately.

Arctic sea ice extent in September, the seasonal low point in the annual cycle, has been declining at a rate of 13.4 percent per decade.

There is very high confidence that CMIP5 models realistically simulate the annual cycle of Arctic sea - ice extent, and there is high confidence that they realistically simulate the trend in Arctic sea - ice extent over the past decades.

> «But just don't go and say «There is very high confidence that climate models realistically simulate the annual cycle of Arctic sea ice extent».

I think that the statement you highlight — «There is very high confidence that climate models realistically simulate the annual cycle of Arctic sea ice extent, and there is high confidence that they realistically simulate the trend in Arctic sea ice extent over the past decades» — is correct as stated.

There is very high confidence that CMIP5 models realistically simulate the annual cycle of Arctic sea - ice extent