Not exact matches
The five lowest summer
sea ice minimums have occurred
over the past five years, researchers noted.
The
minimum Arctic
sea ice has declined by a little
over half since its maximum extent of the past three decades.
Artic
sea ice minimum has been retreating
over the past thirty years (shown in yellow).
As a result, the
sea ice volume at its annual
minimum has declined 75 %
over the past three decades.
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.
And remember, the satellite data are one small part of a vast amount of data that overwhelmingly show our planet is warming up: retreating glaciers, huge amounts of
ice melting at both poles, the «death spiral» of arctic
ice every year at the summer
minimum over time, earlier annual starts of warm weather and later starts of cold weather, warming oceans, rising
sea levels, ocean acidification, more extreme weather, changing weather patterns overall, earlier snow melts, and lower snow cover in the spring...
Arctic
sea ice extent (SIE) has decreased
over recent decades, with record - setting
minimum events in 2007 and again in 2012.
Depending on how the weather plays out
over the next few weeks, that
minimum is likely to fall somewhere between second and fifth place, they estimate — still a remarkably low level that shows how precipitously
sea ice has declined in recent decades.
They collectively conclude that recent September
sea ice minima are more related to longer term shifts in thermal forcing and
ice melt and thus persistence, and in most years, month - to - month meteorological variability
over the summer months tends to cancel out extremes in atmospheric forcing.
Actually Fielding's use of that graph is quite informative of how denialist arguments are framed — the selected bit of a selected graph (and don't mention the fastest warming region on the planet being left out of that data set), or the complete passing
over of short term variability vs longer term trends, or the other measures and indicators of climate change from ocean heat content and
sea levels to changes in
ice sheets and
minimum sea ice levels, or the passing
over of issues like lag time between emissions and effects on temperatures... etc..
Both 2007 and 2008 qualify as major outliers compared to previous summer
minimum sea ice extents
over the last three decades.
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 very small change in ocean water temperatures since
sea ice measurements began in 1979 does not match with gains (or losses) in any season, not from Sept (Arctic
sea ice minimum)
over through winter to March - April
sea ice maximums.
Although there is general consensus in the September Outlook for either persistent conditions or a slight increase
over the 2008
sea ice extent, Outlook contributions which provide probabilistic assessments indicate about a 20 % chance of reaching a new September
sea ice minimum in 2009.
Although the majority of the responses indicate either persistent conditions or a slight increase
over the 2008
sea ice extent, there appears to be about a 20 % chance of reaching a new
minimum in 2009.
Behavior of the
sea ice over the past winter and the spring and the large positive temperature anomalies in the Arctic (as high as 20 degrees C
over large regions in the past winter) suggest that an extent near that of the 2012
minimum may occur again if there is large export of
sea ice out to the Atlantic Ocean via the Fram Strait.
NASA satellites have seen the
minimum summertime
sea ice coverage decline by 13 percent
over the last three decades, along with a decline in
sea ice thickness.
Since the graph isn't fine grained enough to track runs year - to - year, it will be interesting to see if we do experience a resurgence in
sea ice growth
over the next couple of years or if melt just goes straight to the expected
minimum of around 1m km2.
The annual mean Arctic
sea ice extent decreased
over the period 1979 to 2012 with a rate that was very likely in the range 3.5 to 4.1 % per decade (range of 0.45 to 0.51 million km2 per decade), and very likely in the range 9.4 to 13.6 % per decade (range of 0.73 to 1.07 million km2 per decade) for the summer
sea ice minimum (perennial
sea ice).
Yes, after an autumn in which the
sea ice extent curve has tracked pretty closely with 2007 — which ended up with a record - low
minimum — we have had a sharp increase in extent
over the last few weeks.
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 northwa
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 northwa
ice extent could still rival the 2007 record
minimum particularly if winds
over the next few weeks push the
ice northwa
ice northward.