New University of Colorado at Boulder calculations indicate the record low
minimum extent of sea ice across the Arctic last September has a three - in - five chance of being shattered again in 2008 because of continued warming temperatures and a preponderance of younger, thinner ice.
Not exact matches
«The autumn volume
of the
sea ice (as opposed to the
extent) is still close to its
minimum record,» Robert Meisner, spokesman for European Space Agency, said yesterday.
In the last three years, the
sea ice's
extent - the ocean area in which a defined
minimum of sea ice can be found — was at its lowest in the 30 - year satellite record.
An image
of an area
of the Arctic
sea ice pack well north of Alaska, captured by the MODIS instrument on NASA's Aqua satellite on Sept. 13, 2013, the day before the National Snow and Ice Data Center estimated Arctic sea ice to have reached its minimum extent for the ye
ice pack well north
of Alaska, captured by the MODIS instrument on NASA's Aqua satellite on Sept. 13, 2013, the day before the National Snow and
Ice Data Center estimated Arctic sea ice to have reached its minimum extent for the ye
Ice Data Center estimated Arctic
sea ice to have reached its minimum extent for the ye
ice to have reached its
minimum extent for the year.
As the Arctic
sea -
ice reaches its summer
minimum extent, it is clear that it has yet again shrunk to one
of the smallest areas in recent decades, 10 % above the record
minimum set last year.
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.
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 2007
minimum occurred on September 18
of that year, when Arctic
sea ice extent stood at 4.15 million square kilometers (1.60 million square miles).
To think that now the Antarctic
sea ice extent is actually reaching a record
minimum, that's definitely
of interest.»
It's unclear whether this year's strong El Niño event, which is a naturally occurring phenomenon that typically occurs every two to seven years where the surface water
of the eastern equatorial Pacific Ocean warms, has had any impact on the Arctic
sea ice minimum extent.
According to a NASA analysis
of satellite data, the 2015 Arctic
sea ice minimum extent is the fourth lowest on record since observations from space began.
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).
«Arctic
sea ice once again shows considerable melting: With a
minimum extent of ca. 4.7 million square kilometres, Arctic
sea ice continues to retreat.»
The exact date and value
of the
minimum sea ice extent in 2017 can only be determined in the coming weeks, after a significant increase.
Extent of Arctic sea ice in September 2016 versus the 1981 - 2010 average minimum extent (gold
Extent of Arctic
sea ice in September 2016 versus the 1981 - 2010 average
minimum extent (gold
extent (gold line).
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.
Least unexpected observations: (Joint winners) 2008 near - record
minima in Arctic
sea ice extent, last decade
of record warmth, long term increases in ocean heat content, record increases in CO2 emissions.
Since that time, winter
sea ice extent has dropped 3.2 percent per decade, while the summer
minimum has seen an even steeper drop
of 13.7 percent per decade.
The
minimum Arctic
sea ice has declined by a little over half since its maximum
extent of the past three decades.
The data presented here indicate that the area
of undersaturation presently extends to approximately 20 %
of the Canadian Basin in the late summer months, when
sea ice is near its
minimum extent.
Although there is still definitely a declining trend in Arctic
sea ice (2009 and 2008 were still the second and third lowest
sea ice extents, after 2007) there was a lot
of hype surrounding the 2007
minimum even though that was partly just natural variability in the Arctic climate.
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.
Just to return to one
of the suggested topics, Arctic
sea ice extent appears to have passed its
minimum for this year with a value higher than has recently been the case.
This means the expectation is that the
minimum Arctic
Sea Ice extent this year will be below that
of 2007.
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 summ
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 summ
Ice Outlook 2009, an effort to collate and compare a variety
of studies aiming to project the
minimum ice extent each summ
ice extent each summer.
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.
My bet is that this year's Arctic
Sea ice extent ice will not fall below last year's
minimum (4.28 or 2.77), because last year's
minimum was very low in comparison to all other years
of record (1979 - current).
So, I was curious about your recent paper and whether there was any discussion
of changes in the THC poleward
of the GIS shelf vs the data from the RAPID program line located at 26.5 N. With the decline in
minimum extent and volume
of sea -
ice, one might expect to see more THC sinking into the Arctic Ocean, with consequences for both climate and weather.
The consolidated database shows that there is no precedent as far back as 1850 for the 21st century's
minimum ice extent of sea ice on the pan-Arctic scale....
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.
I view the question
of whether the
minimum sea ice extent sets a new record this year as secondary.
WattsUpWithThat.com, 4.9, Heuristic Website devoted to climate and weather polled its readers for the best estimate
of 2012
sea ice extent minimum by choosing bracketed values.
Jin (IARC), 5.06, Modeling (same as June) A coupled
ice - ocean model forecast
of the September
sea ice extent minimum.
Scientists use the summer
minimum as one measure
of the
extent of Arctic
sea ice for that year.
Now it's official: as
of September 16, according to the National Snow and
Ice Data Center, the sea ice covering the Arctic Ocean reached a record low minimum exte
Ice Data Center, the
sea ice covering the Arctic Ocean reached a record low minimum exte
ice covering the Arctic Ocean reached a record low
minimum extent.
Shorefast
ice conditions along the northeastern Chukchi
Sea coast (Barrow to Wainwright) reflect the combination
of late freeze - up after the 2012 record
minimum summer
ice extent and persistent westerly flow advecting warm air throughout fall and early winter.
Why, because the current
sea ice extent is already lower than the average
minimum for the decade
of the 90s?
This month's report includes details on the causes
of the 2012
minimum, the use
of sea ice volume versus
extent,
sea ice in climate models, and late spring 2013 conditions.
Klazes (Public), 3.6 (95 % confidence interval
of + / - 0.9), Statistical September
extent is predicted using an estimated
minimum value
of the PIOMAS arctic
sea ice volume and a simple model for volume -
extent relationship.
Please note that this is not an announcement
of the
sea ice minimum extent for 2012.
The
minimum ice extent was the second lowest in the satellite record, after 2007, and continues the decadal trend
of rapidly decreasing summer
sea ice.
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
UPDATE 27 AUGUST: Sunday's data confirms that the previous
sea -
ice extent minimum of 24 September 2007 was broken last Friday, 24 August 2012.
This year's
minimum follows a record - breaking summer
of low
sea ice extents in the Arctic.
Liu, J., M. Song, R. Horton, and Y. Hu, 2015: Revisiting the potential
of melt pond fraction as a predictor for the seasonal Arctic
sea ice extent minimum.
However, despite the fact that their own data show that
sea ice extent stayed at that value for three days, NSIDC has chosen the last day
of that 3 - day period rather than the first to represent the 2015
minimum.
In the summer
of 2012, Arctic
sea ice has broken the previous record for
minimum extent (set in 2007), fallen below 4 million square kilometers, and, as
of September 17, dropped below 3.5 million square kilometers in
extent.
Arctic
sea ice in 2017 had record - low
extents for much
of the first five months
of the year, though it recovered a bit after that to show only the eight lowest summer
minimum on record.