Sentences with phrase «ice extent compared»

No, Climate Change Deniers and Patsies, Wider Arctic Ice Extent Compared to Last Year's Record Low Does Not Mean «Climate Change is Dead» NOAA: 2012 Was Hottest Year on Record.

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 greatest difference compared with other comparable services is that traditionally they only tell about the extent of the ice or snow situation.

Ola Johannessen and his colleagues at the Nansen Environmental and Remote Sensing Centre in Bergen base their claims on an analysis of two consecutive series of data on the extent of the ice packs which have previously been impossible to compare.

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.

In other words, the reading for May 2008 is compared to the ice extent from May 2007 and also to the average, for the month of May, from 1979 - 2000.

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.

This increase was based on the June ice extent remaining within 1 sigma of the 1981 - 2010 long - term mean and nearly average melt pond coverage compared to recent years.

To illustrate that last point, this animation compares 25 March 2011 ice extent on Greenland's northeast coast with 25 March, 10 April, and 01 June 2010.

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?

Comparing the mean extent for 1999 — 2008, with the July 2008 extent we see a slightly greater ice extent west of Franz Josef Land (FJL), and a slightly smaller extent east of FJL.

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.

Ice coverage in summer 2007 reached a record minimum, with ice extent declining by 42 % compared to conditions in the 198Ice coverage in summer 2007 reached a record minimum, with ice extent declining by 42 % compared to conditions in the 198ice extent declining by 42 % compared to conditions in the 1980s.

Figure 5 compares the April 2011 ice extent with previous years.

When comparing the ice extent for July 2007 with that of 2008 between Svalbard and FJL, the ice edge was much further north in 2007 than in 2008.

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.

A notable feature of the 2013 extent is an ice «tongue» between Franz Josef Land and Novaya Zemlya; further west, the ice extent is relatively far north compared to previous years.

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 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.