Sentences with phrase «with sea ice extent»

Moreover, the spring melt is now proceeding very rapidly with sea ice extent already below last's year level on this date and identical to that of 2008.

The sea ice extent of September has a good correlation with the sea ice extent of Jan to Apr of the same year and the extent of September 3 years ago.

Unfortunately, the RECOVERY form that FREEZING COLD anomaly seems to have come to an end, with the sea ice extent STILL in the top 10 % of the last 10,000 years.

The decrease has been greatest during summer, with sea ice extent reducing by around 12 % per decade since the satellite record began in 1979.

Similar problems can arise with sea ice extent changes.

Even though the area of Antarctic ice has increased in recent years the volume has fallen so, with sea ice extents, it isn't simply a question of deducting one increase from another decrease.

Not exact matches

Climate changes that began ~ 17,700 years ago included a sudden poleward shift in westerly winds encircling Antarctica with corresponding changes in sea ice extent, ocean circulation, and ventilation of the deep ocean.

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.

«This year is the fourth lowest, and yet we haven't seen any major weather event or persistent weather pattern in the Arctic this summer that helped push the extent lower as often happens,» said Walt Meier, a sea ice scientist with NASA's Goddard Space Flight Center in Greenbelt, Maryland.

In contrast, the Scripps team opted to directly correlate albedo measurements made by NASA's CERES instrument data with observations of sea ice extent made by the Special Sensor Microwave Imager (SSM / I) radiometers aboard Defense Meteorological Satellite Program satellites.

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).

«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.»

I think that the GCMs do a good job for most of the planet, but independent work suggest local problems in the Arctic associated with a misrepresentation of the sea - ice extent.

Consistent with observed changes in surface temperature, there has been an almost worldwide reduction in glacier and small ice cap (not including Antarctica and Greenland) mass and extent in the 20th century; snow cover has decreased in many regions of the Northern Hemisphere; sea ice extents have decreased in the Arctic, particularly in spring and summer (Chapter 4); the oceans are warming; and sea level is rising (Chapter 5).

The Arctic's sea ice extent reached an all - time low in September 2012, with the smallest recorded extent since satellite observations began.

The global mean temperature rise of less than 1 degree C in the past century does not seem like much, but it is associated with a winter temperature rise of 3 to 4 degrees C over most of the Arctic in the past 20 years, unprecedented loss of ice from all the tropical glaciers, a decrease of 15 to 20 % in late summer sea ice extent, rising sealevel, and a host of other measured signs of anomalous and rapid climate change.

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

The estimated DJFM Antarctic sea ice extent climatology for the period 1897 — 1917, with and without the inclusion of the Worby and Comiso offset (an offset between where satellites and human observers view the sea ice edge), is plotted alongside time series of DJFM mean sea ice extent calculated from HadISST2.2, NASA Team and NASA Bootstrap sea ice datasets.

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.

With increasingly less multi-season ice, rebuilding previous sea ice extent gets harder and harder.

February saw record low sea ice extent, with ice running 448,000 square miles below average.

Historically, a new low sea ice extent (area) is set every five years, with small recoveries in - between.

Observed decreases in arctic sea ice extent have been shown to be inconsistent with simulated internal variability, and consistent with the simulated response to human influence, but SH sea ice extent has not declined.

Current predictions [5], [6] suggest that trends in sea ice extent will alter in the second half of this century and that the annual average sea ice extent will diminish by 33 %; most of this retreat is expected to occur in winter and spring [5], [6], with attendant risks for emperor penguins.

With that type of mild weather, it's not surprising that January also had a record low sea ice extent for the month.

February saw record low sea ice extent, with ice running a significant 448,000 square miles below average.

With only 30 + year time series of sea ice extent or volume, this is something difficult to do so we have to strive to construct longer time series that allow an assessment of natural variability at those times scales.

A smaller ice sheet extent might still respond with the observed high rate of sea level rise (5 m per century) if the warming is much more rapid than when ice sheets were more extensive.

I think that the GCMs do a good job for most of the planet, but independent work suggest local problems in the Arctic associated with a misrepresentation of the sea - ice extent.

Low maximum sea ice extent also occurred over periods of some decades (e.g., mid-seventeenth and mid-eighteenth centuries, early fifteenth and late thirteenth centuries), with absolute values in some cases as low as the twentieth century ones, but these periods were in no case as persistent as in the twentieth century. . .

You complain that there was no mention of Arctic Sea Ice Extent in the Guardian article reporting exceptional warm temperatures up in the high Arctic yet I contrasted that report of exceptional warmth with JAXA Arctic SIE values of recent days.

The lag between decreases in sea ice extent during late summer and changes in the mid-latitude atmospheric circulation during other seasons (when the recent loss of sea ice is much smaller) needs to be reconciled with theory.

I don't know if it would be possible to force a climate model with the observed sea ice extent evolution (and an extrapolation) to get some information what this might produce.

«I think the natural variability component of Arctic sea ice extent is in the process of bottoming out, with a reversal to start within the next decade.

Global climate model projections (in CMIP3 at least) appear to underestimate sea ice extent losses with respect to observations, though this is not universally true for all models and some of them actually have ensemble spreads that are compatible with PIOMAS ice volume estimates and satellite observations of sea ice extent.

# 51 — Dan, I respectfully disagree with your comment that «these types of attempts are used to recreate the extent of the sea ice as best we can.»

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 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.

I'm sure this is true for Arctic sea ice extent trends as well, even though Gavin said he was fine with Judith's quoted paragraph pertaining to sea ice.

Historically, a new low sea ice extent (area) is set every five years, with small recoveries in - between.

By contrast, true Ice Ages drastically reshaped the planet, with much greater changes in global temperature, sea level, and ice exteIce Ages drastically reshaped the planet, with much greater changes in global temperature, sea level, and ice exteice extent.

This second hypothesis is compatible with reconstructions from dinocysts that suggest maximum sea - ice extent during the early Holocene.»

The paper, combining evidence of driftwood accumulation and beach formation in northern Greenland with evidence of past sea - ice extent in parts of Canada, concludes that Arctic sea ice appears to have retreated far more in some spans since the end of the last ice age than it has in recent years.

Using comprehensive data sets of observations made between 1979 and 2001 of sea ice thickness, draft, extent, and speeds, we find that it is possible to tune model parameters to give satisfactory agreement with observed data, thereby highlighting the skill of modern sea ice models, though the parameter values chosen differ according to the model forcing used.

Hence, a «healthy» sea - ice state is a state with both large volume or large extent.

Predicting sea ice extent is easy if you can mentally calculate wind variations, momentum, sea currents, multi year ice compression ratios, tidal synergy with weather patterns, the AO, the temperature of ice sea water and air, how cloudy it will be, salinity, pycnocline convection rates, sea surface to air interface, CO2 exchange, ice thickness distributions.....

Our results hence show that the observed evolution of Arctic sea - ice extent is consistent with the claim that virtually certainly the impact of an anthropogenic climate change is observable in Arctic sea ice already today.»

This finding is consistent with the expected effect of increasing greenhouse gas concentrations and with other observed evidence of a changing climate such as reductions in Arctic sea ice extent, melting permafrost, rising sea levels, and increases in heavy downpours and heat waves.

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 weatWith 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 weatwith consequences for both climate and weather.

Francis & Hunter found that the downward long - wave radiation associated with a retreating sea - ice extent is more important (a stronger effect) than cloud modulation of SW also associated with the sea - ice extent.