Sentences with phrase «ice recorded during»

While a 14 % loss is not an insignificant amount, it's smaller than some of the changes in Antarctic sea ice recorded during the middle of the 20th century, as estimated from whaling ship logbooks, the paper says.

Not exact matches

To calculate the correlation during the Little Ice Age, researchers compared the core data with proxies for precipitation data, such as data from tree rings, cave formations and other natural records.

«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.

«This highly unusual state of the atmosphere has been linked to record low sea ice cover during summer over the Arctic Ocean.

To get these findings, a NASA - funded team led by Laurence Smith, chair of the geography department at UCLA, spent six days on the ice during July 2012 — directly after a record - setting ice sheet melt.

Guliya is thought to be the best record of midlatitude climate during the last ice age, and its ice may well turn out to be a Rosetta Stone for interpreting how Asia responds to a changing climate.

During a record melting jag this past summer, the Greenland ice sheet lost 552 billion tons (19 billion tons lower than the previous low), and the volume of sea ice fell to half the volume it had four years ago.

«According to the fossil record of bones, roadrunners didn't appear until very recently, in the last million years during the Ice Age.

In 2002 a Rhode Island — sized hunk of the Larsen B ice shelf on the Antarctic Peninsula shattered into thousands of icebergs during the peninsula's hottest summer on record (SN: 3/30/02, p. 197).

The spectacular ice cave at Scărișoara fills a crucial piece of the puzzle of past climate change in recording what happens during winter.»

But during the 6 weeks the researchers spent on the Gould documenting the interaction between humpbacks and krill in Wilhelmina Bay and nearby waters, they counted 306 humpbacks parked on the huge krill swarm, and a total of 500 throughout the unusually ice - free bay at the record - setting density of 5.1 whales per square kilometer.

Ice core records are rich archives of the climate history during glacial - interglacial cycles over timescales of up to ~ 800 kyr before the current age.

The biggest area of anomalous warmth in February was the Arctic, which also had record - low sea ice levels during January and February.

In the early 1990s, they re-created a history of the Earth's atmosphere throughout the past 400,000 years — a record of our planet's air during the past four ice ages.

study published June 25 by the Proceedings of the National Academy of Sciences, the Greenland ice core drifts notably from other records of Northern Hemisphere temperatures during the Younger Dryas, a period beginning nearly 13,000 years ago of cooling so abrupt it's believed to be unmatched since.

The overall Arctic sea ice cover during June averaged 4.09 million square miles, the lowest in the satellite record for the month, according to the NSIDC.

The lowest extent on record came during the remarkable summer melt season of 2012, fueled in part by summer storms that moved ice into warm waters.

are now thought of as inaccurate because the lower layers of the ice sheet have become buckled and jumbled up However, at least one major cold and dry event during the Eemian seems to be corroborated by the terrestrial pollen record from Europe and China (Zhisheng & Porter 1997).

Ice Age paleontologist Prof. Dr. Ralf - Dietrich Kahlke of the Senckenberg Research Station for Quaternary Paleontology in Weimar recorded the maximum geographic distribution of the woolly mammoth during the last Ice Age and published the most accurate global map in this regard.

It was largely positive during the winter of 2007 - 8, which followed the previous sea ice record low, and then turned record negative during the winter of 2009 - 10, during which the infamous «Snowmageddon» blizzard occurred along the East Coast.

Applications of foraminiferal δ11B to the geological record are highlighted, including studies that trace CO2 storage and release during recent ice ages, and reconstructions of pCO2 over the Cenozoic.

Evidence for regional warmth during medieval times can be found in a diverse but more limited set of records including ice cores, tree rings, marine sediments, and historical sources from Europe and Asia, but the exact timing and duration of warm periods may have varied from region to region, and the magnitude and geographic extent of the warmth are uncertain.

High - Resolution Accumulation and Aerosol Records during the Past 2000 Years from an East Antarctic Ice Core Array.

More recent studies, with much more precise correlation between ice cores and global temperature records, have shown that temperature and CO2 changed synchronously in Antarctica during the end of the last ice age, and globally CO2 rose slightly before global temperatures.

For example, the 2012 record minimum came during the remarkable summer melt season of 2012 and was fueled in part by summer storms that moved ice into warm waters.

An ultra-high resolution continuous record of methane variations during the last glacial - interglacial transition from the WAIS Divide ice core.

A new high - precision record of.13 C of CO2 during the last millennium from the WAIS Divide Ice Core.

The major areas of anomalous warmth were around the Arctic, which also saw record low sea ice extent during January and February.

No matter what their current record might be, when you see the team take the ice (preferably during the Battle of Alberta) you'll feel that rush of pride that reminds you why Edmonton is such a wonderful city.

In the second of this two - part podcast series, produced on the occasion of the first exhibition dedicated to Avercamp, Arthur Wheelock talks with curator Bianca du Mortier about Avercamp's 17th - century theatrical settings on ice, which not only depict a tremendous diversity of subjects but also record daily life during the Dutch Golden Age.

In any event, there is unequivocal geologic evidence for parts of the GIS still in tact during the last interglacial, and Northern Hemisphere ice core records (see NEEM) now go back that far, which rules out ice - free conditions at the time in the NH.

Since the volume of ice at risk under BAU is within a factor of two of the volume of ice at risk during a deglaciation under orbital forcing, while the forcing is much more rapidly applied under BAU, looking at sea level rise rates in the paleo - record might actually be considered a search for lower limits on what to expect if reticence did not run so strongly in our approach.

During the record - setting wildfire season of 2012, Box was anxious to quickly get to Greenland to collect samples of the ice to see if soot from Colorado was landing on the glaciers, but by that time, traditional sources of science research funding were already allocated, so in his unorthodox, punk rock style, Box set out on his own and set up The Dark Snow Project to crowd - fund his research.

During the so - called Holocene Climate Optimum, from approximately 8000 to 5000 years ago, when the temperatures were somewhat warmer than today, there was significantly less sea ice in the Arctic Ocean, probably less than 50 % of the summer 2007 coverage, which is absolutely lowest on record.

Arctic sea ice has been shrinking more rapidly, falling to its lowest volume and second lowest area on record during the 2011 summer melt season.

if the proxy record showed a period longer than 50 yr of cooling, wetness or dryness during the Little Ice Age, and similarly for a period of 50 yr or longer for warming, wetness or dryness during the Medieval Warm Period??

Not surprisingly given the record minimum ice extent last Fall, my subjective impression during our 2008 airborne hydrographic survey was that there was much more first - year ice (hasn't survived a summer) than in previous years.

To put those questions into perspective, the U.S. CCSP claims «According to paleoclimatic records, there is no evidence of an ice - free summer Arctic during the last 800 millennia...»

Combined climate / ice sheet model estimates in which the Greenland surface temperature was as high during the Eemian as indicated by the NEEM ice core record suggest that loss of less than about 1 m sea level equivalent is very unlikely (e.g. Robinson et al. (2011).

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

However, during the mid-2000s, with several fewer years in the observational record, the trend in Antarctic sea ice extent was reported to be considerably smaller and statistically indistinguishable from zero.

There is other evidence that can be used to calculate the temperatures and CO2 levels before the times recorded in the ice cores, and also during the times of the ice cores.

The lowest amounts of Arctic sea ice on record since satellite monitoring began in 1979 have all been recorded during the last six years.

Evidence for regional warmth during medieval times can be found in a diverse but more limited set of records including ice cores, tree rings, marine sediments, and historical sources from Europe and Asia, but the exact timing and duration of warm periods may have varied from region to region, and the magnitude and geographic extent of the warmth are uncertain.

Research indicates that the Arctic had substantially less sea ice during this period compared to present Current desert regions of Central Asia were extensively forested due to higher rainfall, and the warm temperate forest belts in China and Japan were extended northwards West African sediments additionally record the «African Humid Period», an interval between 16,000 and 6,000 years ago when Africa was much wetter due to a strengthening of the African monsoon While there do not appear to have been significant temperature changes at most low latitude sites, other climate changes have been reported.

«The hypothesis that the CO2 rise during the interglacials caused the temperature to rise requires an increase of about 6 °C per 30 % rise in CO2 as seen in the ice core record.

During the last ice age, over 20 abrupt and dramatic climate shifts occurred that are particularly prominent in records around the northern Atlantic (see Section 6.4).

The occurrence of artefacts in earlier ice core records mainly from Greenland drill sites [enrichment of CO2 due to chemical reactions in the ice; depletion of CO2 due to fractionation during clathrate formation (5)-RSB- can be avoided by careful sample selection.

Because hurricane caused flooding was more prevalent during the Little Ice Age when Atlantic temperatures averaged 1 to 2 degrees F colder than today researchers concluded, «The frequent occurrence of major hurricanes in the western Long Island record suggests that other climate phenomena, such as atmospheric circulation, may have been favorable for intense hurricane development despite lower sea surface temperatures.»

Warmest decades of the Medieval Warm Period, and coolest decades of the Little Ice Age, after re-centering each reconstruction to match the instrumental temperature record during the period of overlap.