Sentences with phrase «average minimum ice»

If we average the minimum ice extent for that decade it is flat.

Not exact matches

The Arctic ice minimum in 2012 was less than 40 % of the average ice cover during the 1970s.

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.

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).

Though slightly larger than last year, the minimum sea ice extent 2017 is average for the past ten years and far below the numbers from 1979 to 2006.

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

After the 2016 September minimum, the Arctic ice growth was very sluggish, leading to well - below average extent through the 2016/2017 ice - growth season.

Twenty - sixteen also brought forth record - low average Arctic sea ice for much of the year, and the second lowest minimum sea ice cover reported.

The average temperature increase is real and the effects are happening much more rapidly than anything seen in the past 2000 years at a minimum and probably since the last ice age around 12000 years ago.

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.

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.

Then note that the past year's minimum was only half the amount of ice we had on average from 1979 — 2000.

Satellite measurements revealed there was a minimum of 4.6 million sq km of Arctic ice last summer, well below the long - term average but above the record low in 2012 of 3.6 million sq km.

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

(Right) Extents and thicknesses of the Greenland Ice Sheet and western Canadian and Iceland glaciers at their minimum extent during the last interglacial, shown as a multi-model average from three ice modeIce Sheet and western Canadian and Iceland glaciers at their minimum extent during the last interglacial, shown as a multi-model average from three ice modeice models.

Thus if one plots all the minima of the different historical measurements, that gives a better impression of the real «background» CO2 level than the averages: see The same for ocean data and coastal data: all are around the ice core level.

The average historic summer minimum (the yellow line in Fig. 1) indicates large portions of the Chukchi Sea's foraging habitat have been covered with summer ice concentrations of 50 % and greater for much of the 20th century.

NASA satellite data reveals how this year's minimum sea ice extent, reached on Sept. 9 as depicted here, declined to a level far smaller than the 30 - year average (in yellow) and opened up Northwest Passage shipping lanes (in red).

In other words, Arctic sea ice extent has been lower than it was in 1938 - 43 during the entire satellite record, and the current average summer extent is approximately 4.3 million square kilometers lower than the 1940 minimum.

The two lowest September ice extents (2007 and 2012) were also both later than average; this year's minimum is the fourth lowest (see chart below).

The minimum ice extent in September 2009 was greater than the past two Septembers, but again fell below the long - term average.

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.

Given the minimum ice extent is about 4 million km2 and 4000 km3 (an average of 1 meter thickness) the SMOS data is of limited value.

It is important to note that the sea ice minimum has remained well below the long - term average every year since 2007 (Figure 1).

It is important to note that the sea ice minimum has remained well below the long - term average every year since 2007.

After above - average air temperatures and record ice loss in May 2010, the ice extent at the beginning of June fell below the previous record minimum for the same day in 2006.

a Average sea ice concentration 1988 — 2007 for March (winter maximum) and September (summer minimum)(Source: http://nsidc.org/).

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).

Specifically, the estimate is calculated by multiplying the average (for the period 1985 - 2007) amount of ice that does not survive the summer (between the March maximum and the September minimum) by this year's March extent.

The mean minimum ice extent in September, averaged across all ensemble members and corrected for forward model bias, is our projected ice extent.

«Arctic minimum sea ice extent at the end of summer was tied with 2007 for the second - lowest amount during the satellite record starting in 1979, at 33 percent below the long - term average.»

Note that this data gives annual averages, rather than annual minimums, so we can't tell when the Arctic Ocean first becomes ice - free.

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).

The average error for the 2007 - 2015 period is 4.9 % or 0.154 million km2 for daily minimum sea ice area.

While the area covered by ice at the end of the summer of 2009 was nearly a quarter smaller than the average of the past 25 years, nevertheless, it was almost 20 per cent greater than at the 2007 minimum.

For example, additional evidence of a warming trend can be found in the dramatic decrease in the extent of Arctic sea ice at its summer minimum (which occurs in September), decrease in spring snow cover in the Northern Hemisphere, increases in the global average upper ocean (upper 700 m or 2300 feet) heat content (shown relative to the 1955 — 2006 average), and in sea - level rise.

In the 1980's and 199o's, sea ice minimum extent (in September) averaged about 6.5 - 7.5 M sq km.

Possibly because when journalists check, it's the average rate of summer melt as the ice decreases from winter maximum of 14 million square km2 in April toward a minimum of 4.5 million km2 in September.

In April 2012, NSIDC updated its method of calculating daily values for the Arctic sea ice extent minimum from a 5 - day centered average to a 5 - day trailing average.

The paper questioned whether climate change was dangerous for polar bears and whether the region was warming at all, even as NASA reported that the 2007 minimum sea ice levels were at an all - time low, falling to nearly 40 percent below the 1979 - 2000 average.

The 2012 minimum sea ice extent was 49 % below the 1979 to 2000 average and 18 % below the previous record from 2007.