Sentences with phrase «sea ice extent compared»

Further, it only took one month of persistent wind conditions to slow the rate of sea ice loss, resulting in an increase in 2009 sea ice extent compared to 2007 and 2008.

The remaining estimates fall into «high» and «low» extent groupings: the low extent group with a range of 4.2 to 4.7 million square kilometers, representing a continued loss of sea ice extent compared to 2008/2009, and the high extent group of 5.4 to 5.7 million square kilometers, suggesting a return to the long - term trend for summer sea ice loss.

However, a number of models that have fairly thick Arctic sea ice produce a slower near - term decrease in sea ice extent compared to observations (Stroeve et al., 2007).

The June Outlook for arctic sea ice in September 2010 shows reasonable arguments for either a modest increase or decrease in September 2010 sea ice extent compared to the last two years (5.4 million square kilometers in 2009 and 4.7 million square kilometers in 2008).

Not exact matches

The algorithm allowed the team to compare the extent of sea ice over the whole period from 1978 to 1994.

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).

Comparing the dataset with modern satellite records, the researchers find that Antarctic summer sea ice extent was «surprisingly comparable» to what it is today.

«What this study shows is that summer sea ice in the Antarctic might not be particularly sensitive to a warming climate compared to the Arctic, however it does leave open the possibility that there has been a decrease in ice extent of at most 14 %.»

Just look at the plots taken from CMIP4 and CMIP5 models when they are compared with measured extents from NSIDC data then tell us where you would place your bet for a summer free of sea ice.

Just look at the plots taken from CMIP4 and CMIP5 models when they are compared with measured extents from NSIDC data then tell us where you would place your bet for a summer free of sea ice.

Check out the difference in extent of most mountain glaciers compared to 30 years ago, or the extent of sea ice in the arctic ocmpared to a few decades ago.There are many manifestations all around us.

For the latest forecasts of this summer's Arctic ice retreat, have a look at Sea Ice Outlook 2009, an effort to collate and compare a variety of studies aiming to project the minimum ice extent each summice retreat, have a look at Sea Ice Outlook 2009, an effort to collate and compare a variety of studies aiming to project the minimum ice extent each summIce Outlook 2009, an effort to collate and compare a variety of studies aiming to project the minimum ice extent each summice extent each summer.

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.

Any curve that represents the sea ice extent this year can not be compared to last year's curve — it would be comparing apples to oranges.

In that sense one could argue that Arctic sea ice extent at least in 1940 was «very low» compared to the early and mid 20th Century, but compared to the past 20 years it was actually very high.

This begs the obvious question - in the scientific literature, how does Arctic sea ice extent during the period 1938 - 43 compare to the rest of the 20th Century and current levels?

Will an excess of 2.0 Mkm ^ 2 in September be «trivial» compared to a total of 20.0 Mkm ^ 2 sea ice extents?

NSIDC reported that the 2010 seasonal sea ice maximum was quite late (31 March compared to the climatological date of 26 February) and the total maximum ice extent approached the climatological mean.

Comparing the latest ice age data from Maslanik and Fowler (see Maslanik contribution) for 21 June 2010 (Figure 6) to current (20 July) ice extent data shows that the ice edge has retreated back to the boundary between first - year and multi-year ice pack in the eastern Arctic and in the Beaufort and Chukchi seas.

Looking at AR5, these seem to be the take away messages: «Comparing trends from the CCSM4 ensemble to observed trends suggests that internal variability could account for approximately half of the observed 1979 — 2005 September Arctic sea ice extent loss.»

Figure 1: This image compares the average sea ice extent for September 2007 to September 2005; the magenta line indicates the long - term median from 1979 to 2000.

Again, we are comparing these Outlook values to the September average sea ice extent as provided by NSIDC.

While the winter / spring 2008 sea - ice extent has rebounded from the 2007 negative mega-anomaly, the age - class distribution at present is negatively skewed compared to satellite climatology and even the values for 2007, as is ice concentration within the ice - ocean margin that defines extent.

Even if the 2008 summer sea ice minimum extent appeared to be slightly above the 2007 all - time record minimum, according to passive radiometers, it does not seem like the ice mass budget is significantly different in 2008 compared with 2007.

Compared to last year, the sea - ice extent is similar, but the ice age data indicates that the ice pack is more vulnerable to loss this year.

Another way to look at sea ice extent it to compare the current level to long term averages.

Both 2007 and 2008 qualify as major outliers compared to previous summer minimum sea ice extents over the last three decades.

Sea ice extent in both 2012 and 2007 represent large reductions compared to the preceding year.

We compared 23,000 days of observations in those records with late twentieth - century observations, and concluded that the extent of the sea ice at the end of winter was pretty much the same in the nineteenth and late twentieth century, but that the end - of - summer Arctic sea ice retreat is greater today than it was then.

It should be recalled that we are comparing these Outlook values to the September average sea ice extent as provided by the National Snow and Ice Data Center (NSIDice extent as provided by the National Snow and Ice Data Center (NSIDIce Data Center (NSIDC).

For example Arctic Sea Ice volume and extent has not dramatically declined this year as compared to the last few more recent years.

Satellite data reveal how the new record low Arctic sea ice extent, from Sept. 16, 2012, compares to the average minimum extent over the past 30 years (in yellow).

While the initial ice cover is remarkably low in the Barents and Kara seas, the forecast suggests limited reductions in ice extent on the Pacific side of the Arctic as compared with recent years.

If the increasing number of sunspots would bring the Arctic index into «a positive phase» as well, then temperature isolation of the High North would in the winters months improve compared to recent years [which brought temperature records over Greenland and the Arctic Ocean — and a smallest ice extent last winter], perhaps allowing for some extra sea ice recovery.

But looking at the May 2016 melt pond fraction in our sea ice simulation, the pond fraction is higher in the Kara Sea, north of Svalbard and in the Fram Strait compared to May 2015 and with a lesser extent to May 2012, but lower in the East Siberian Sea and the Arctic Bassea ice simulation, the pond fraction is higher in the Kara Sea, north of Svalbard and in the Fram Strait compared to May 2015 and with a lesser extent to May 2012, but lower in the East Siberian Sea and the Arctic BasSea, north of Svalbard and in the Fram Strait compared to May 2015 and with a lesser extent to May 2012, but lower in the East Siberian Sea and the Arctic BasSea and the Arctic Basin.

Compared to the Arctic, Antarctic sea - ice extent is not as strongly influenced by recent global warming, with year - to - year climate variability still playing a large role in year - to - year changes in Antarctic sea - ice extent.

At the same time, they point towards below normal ice extent in the Barents / Kara Sea, also compared to the record minimum in 2007, which they see coupled to oceanic processes and promoting further warming of surface waters in the region.

The study was conducted by climate researchers at the University of Reading, and it approximates that the extent to which the Antarctic summer sea ice has diminished doesn't exceed a 14 percent rate compared to the beginning of the 20th century.

The site writes that despite all the global warming and ice - melt fantasies circulating through the circles of climate alarmism, «Arctic sea ice extent in July 2015 increased strongly compared to a year earlier.»

If you felt so inclined, you could even compare sea ice extent in July 2007 and 2008, to show just how remarkably quickly the Arctic recovered from its historic low.

Figure 2: Arctic sea ice extent, September 2017, compared to the record low year of 2012 and the 1981 - 2010 average.

Figure 5: Arctic sea ice extent for September 2017 according to HadISST1.2, compared to an extrapolation from the long - term linear trend and predictions submitted to the three SIPN reports.

When compared (validated) against historical sea ice observations it was found that the reconstruction not only had a dominant temperature - related signal, but that the proxy - based reconstruction also had a second signal which corresponded with variations in sea ice cover (extent), therefore confirming the 2nd network signal was a proxy for Arctic sea ice cover (as shown in figure 1).

Both articles claimed that Arctic sea ice extent grew 60 percent in August 2013 as compared to August 2012.

Figure 1: Median and interquartile range of July SIO predictions, compared with observed September mean sea ice extent.

Ice extent in the Beaufort and Chukchi Seas remains high compared to the 2007 minimum.

Figure 2: Median and interquartile range of NCAR and NSIDC pool predictions, compared with observed September mean or one - day minimum sea ice extent.

Ice extent in the Beaufort, Chukchi, and East Siberian Seas remain high compared to the 2007 record minimum, however, the overall ice extent could still rival the 2007 record minimum particularly if winds over the next few weeks push the ice northwaIce extent in the Beaufort, Chukchi, and East Siberian Seas remain high compared to the 2007 record minimum, however, the overall ice extent could still rival the 2007 record minimum particularly if winds over the next few weeks push the ice northwaice extent could still rival the 2007 record minimum particularly if winds over the next few weeks push the ice northwaice northward.