Sentences with phrase «ice records observed»

2018 and 2017 are the two lowest winter time Arctic sea ice records observed.

Not exact matches

Nie and Garzione suggest that the fluctuating Antarctic ice sheet in the late Miocene, at a time when there was minimal ice in the Northern Hemisphere, exerted the dominant control on the 100,000 year cycles observed in the Qaidam Basin record.

«Although a direct causal link has not been established between the atmospheric phenomena observed in late October 2012 and the record - breaking sea - ice loss observed during the preceding summer months, all of the observations are consistent with such an interpretation,» states the Oceanography article.

AWI researchers observed a considerable decrease in the thickness of the sea ice as early as the late summer of 2015, even though the overall ice covered area of the September minimum ultimately exceeded the record low of 2012 by approximately one million square kilometres.

That helped drive last summer's near - record thaw of Arctic sea ice, second only to the dramatic melt observed in 2007.

When the researchers compared their results with the output of a number of climate models, they found that several of the newer models that have higher resolution and use updated ice sheet configurations do «a very good job» of reproducing the patterns observed in the proxy records.

Complementary analyses of the surface mass balance of Greenland (Tedesco et al, 2011) also show that 2010 was a record year for melt area extent... Extrapolating these melt rates forward to 2050, «the cumulative loss could raise sea level by 15 cm by 2050 ″ for a total of 32 cm (adding in 8 cm from glacial ice caps and 9 cm from thermal expansion)- a number very close to the best estimate of Vermeer & Rahmstorf (2009), derived by linking the observed rate of sea level rise to the observed warming.

The record melting of Arctic sea ice observed this summer and fall led to record - low levels of ice in both September and October, but a record - setting pace of re-freezing in November, according to the NASA Earth Observatory.

Indeed, Claude Lorius, Jim Hansen and others essentially predicted this finding fully 17 years ago, in a landmark paper that addressed the cause of temperature change observed in Antarctic ice core records, well before the data showed that CO2 might lag temperature.

Evaluating ocean and atmospheric observations with advanced modeling tools, scientists from NOAA and CIRES found that about 60 percent of 2016's record warmth was caused by record - low sea ice observed that year, and the ensuing transfer of ocean heat to the atmosphere across wide expanses of ice - free or barely frozen Arctic Ocean.

More importantly, we must wonder what the satellites would have observed happening in the Antarctic when Roald Amundsen sailed through the Arctic in 1903 - 1905 on the small wooden ship Gjøa when the Northwest Passage was open to sailing vessels, and again in 1940 - 42 and 1944 (St. Roch), it is possible the reduction in Arctic ice is not an indicator of warming, since it was balanced by record high Antarctic ice levels and a rising trend line for the data set since 1979.

Ever since satellites allowed a detailed view of the Arctic and its ice, a pronounced decrease in summer sea ice cover has been observed (with this year setting a new record low).

Global mean temperatures in 2011 did not reach the record - setting levels of 2010, but were still the highest observed in a La Niña year, and Arctic sea - ice extent fell to near - record - low levels.

For now, all NSIDC and NASA researchers can do is observe and record these rising and decreasing sea ice levels.

«Using a GCM, can we regenerate the land temperature record from the ocean record using observed SSTs and sea ice distribution as a boundary condition?

Their estimates, however, for the increases in nitrate and ammonium associated with a Younger Dryas — size comet are orders of magnitude larger than observed in the Summit Greenland ice core records; the Younger Dryas nitrate and ammonium increases are at most just half of the Tunguska increase.

The National Snow and Ice Data Center (NSIDC) issued a preliminary announcement on September 19 noting that it was likely the minimum extent for the year and the lowest extent observed in the 33 - year satellite record.

The 800 year lag is observed in ice core records following (and prior to) Glacial Minima (Gm).

This is not what is observed in, e.g., the ice core record, hence your assumptions are wrong.

In fact, 2015 and early 2016 set records for the most sea ice extent observed.

This week, it was those darn walruses, who — after a summer when Arctic sea ice was at its sixth - lowest level on record — mobbed an Alaska beach in the largest such haul - out ever observed there.

Although ice extent at the end of June 2010 was slightly lower than that observed in 2007 (Figure 2), the persistence of the Arctic Dipole Anomaly (DA) throughout the summer of 2007 resulted in an acceleration of ice loss in July that led to the record low ice extent in September 2007.

The drop in estimate values between the two first Outlooks reflected in part record ice loss rates observed in June.

These have been observed in the paleo record including ice core data plus many historical references, so are very likely to be real (unlike unicorns, which have only been sighted after a night of heavy drinking).

• Create a Bias - corrected Observed Ice Thickness Record consisting of all of the observations in the Sea Ice CDR adjusted by subtracting a constant bias for each system which is found relative to a standard observation system (submarines).

Such an extended ice sheet associated with strong katabatic winds should have caused polynya - like open - water conditions in front of the ice sheet (Fig. 5a), resulting in increased fluxes of phytoplankton, ice algae and terrigenous matter as observed in the PS2757 - 8 record (Fig. 2c and Fig. 6, Scenario 2), i.e., a situation similar to that proposed for the Barents Sea continental margin (Fig. 5a) 57, 58.

Tropical cyclone activity and intensity increasing Record droughts, floods, heat waves, cold spells, high tides occurring Unequivocal warming of the climate system observed with very high confidence that human activities are to blame Temperature rising even more dramatically in Arctic, threatening ice loss and extinction of species Halving human CO2 emissions immediately might save the planet from catastrophe.

Global sea ice (Arctic plus Antarctic) continues to track at record low levels in the satellite record, but the deviation from average has moderated compared to what was observed in November.

Those dangers are now being dramatically demonstrated around the globe: drought in the Marshall Islands in the Pacific, which has forced the government there to issue a state of emergency warning; France observed its warmest winter since records began; while the sea ice that has formed in the Arctic this winter is about a million square kilometres less than its average for this time of year.

The prediction is initialised with the mean of the observed sea ice extent for September 2009 - 2013 and an ensemble prediction is created simply by adding all of the observed changes in the sea ice extent record from one September to the next over the historical period 1979 - 2013.

The summer of 2012 brought Greenland far more extensive melt than anything observed in the satellite record: in July 2012, surface melt extended over nearly the entire ice sheet.

Observed ice extent rapidly decreased over the last week of June, and the ensemble forecast has bifurcated in response to evolving conditions with three ensemble members indicating record ice loss.

... Our analysis shows that the wind anomalies related to the negative SAM during the 2016/17 austral summer contributed to the record minimum Antarctic sea ice extent observed in March 2017.

The researchers assert that the record - breaking sea ice loss from summer 2012, combined with the unusual atmospheric phenomena observed in late October, appear to be linked to global warming.

That was the reaction from scientist after scientist to a new report by the World Meteorological Organisation (WMO), which documented record - breaking droughts, heatwaves, rainfall, melting of sea ice and a host of tangible signs observed in 2016 that the Earth's climate has changed.

Of course, we all know that Arctic sea ice has been on a downward trend since satellite records started in 1979, reversing a growing trend from the 1940s to the 1970s, which was observed by other means by mostly Russian records.

The dramatic increase in ice is evident, when compared to the record - low amount observed Sept. 16 (below, right).

Still, the extent of sea ice recorded in November was well shy of the median extent observed over the past quarter century, as the image from Nov. 14 (above, right) shows.

«This situation is unlike anything observed in previous record low ice seasons,» said Mark Drinkwater of the European Space Agency's Oceans / Ice Unice seasons,» said Mark Drinkwater of the European Space Agency's Oceans / Ice UnIce Unit.

The ice core data is insensitive to an epoch of 50 to 100 years, such as that observed in the full MLO record.

Second, and less important but still rather spectacular, was the melting of virtually every square inch of the surface of this ice sheet over a short period of a few days during the hottest part of the summer, a phenomenon observed every few hundred years but nevertheless an ominous event considering that it happened just as the aforementioned record ice mass loss was being observed and measured.

After all, at the same time the Arctic was melting, the Antarctic Ice Cap at the South Pole was setting a record for the greatest extent of polar ice in observed history and at the same time South America and much of the Southern Hemisphere was experiencing the coldest and longest winter in at least 50 yeaIce Cap at the South Pole was setting a record for the greatest extent of polar ice in observed history and at the same time South America and much of the Southern Hemisphere was experiencing the coldest and longest winter in at least 50 yeaice in observed history and at the same time South America and much of the Southern Hemisphere was experiencing the coldest and longest winter in at least 50 years.

Ice loss during the second half of August was in fact the slowest observed during the last decade, resulting in the observed, unexceptional September sea ice extent being recorded despite the extremely low ice conditions present at the start of the summIce loss during the second half of August was in fact the slowest observed during the last decade, resulting in the observed, unexceptional September sea ice extent being recorded despite the extremely low ice conditions present at the start of the summice extent being recorded despite the extremely low ice conditions present at the start of the summice conditions present at the start of the summer.

The paper found the pattern was observed during the winter of 2012 - 2013, following the lowest fall sea ice extent on record in September 2012.

Our proxy - based reconstructed history of late - summer Arctic sea ice extent over the period AD 561 — 1995 is presented in Fig. 3a along with the observed sea ice record.

However, the full study does indicate that multi-meter sea level rise before 2100 is likely, based on ice loss doubling times, paleoclimate records and observed ocean current changes, among other factors.

2017 set a new record for the lowest winter maximum sea ice extent observed.

Now comes a report in the UK Daily Mail that «eminent scientists» have observed a record return of the Arctic ice cap as it grows by 60 percent in a year, covering with ice almost 1 million more square miles of ocean than in 2012.

As has been observed in the paleo record, there seem to be two basic default modes, Hot House and Ice Box.

The mean ice extent for July was 8.39 million square kilometers, the second lowest July ice extent observed during the satellite data record.