Sentences with phrase «years ice record»

In Wisconsin scientists have analyzed data collected by Aldo Leopold 61 years ago, and also 100 years ice record data.

Not exact matches

In March 2017, sea ice around the North and South Poles reached record lows for that time of year.

When I imagined my summer break this year, all I could think about was going to the beach, sipping iced tea, and catching up on my favorite classic films I've recorded throughout the semester.

Australian scientists have welcomed the success of a five - year Greenland ice core drilling project that is expected to reveal a record of more than 130 000 years and provide an insight into future global climate.

Despite the worst ice conditions in years and a near catastrophic tent fire, we survived for 24 days on the ice and set the record for the first mother and son team to reach one of the Earth's poles by foot.

Researchers established the first camp here in 1989, at the start of an international effort that drilled the 3,053 - meter - long Greenland Ice Sheet Project - 2 ice core, retrieving a record of climate over the previous 110,000 yeaIce Sheet Project - 2 ice core, retrieving a record of climate over the previous 110,000 yeaice core, retrieving a record of climate over the previous 110,000 years.

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.

From disease to weather patterns, the meltdown of Arctic sea ice — close to record levels again this year — is changing the globe

«Northern Hemisphere snow cover has decreased and Arctic Sea ice has been at record low levels in the past three years.»

Manley's Central England record coincides well with the year - to - year rises and falls of temperature proxies: tree rings and written records of when winter ice spread over rivers or harbors and trees sprouted leaves.

Dust found in the ice gives a record of what was in the air thousands of years ago, whether from volcanic eruptions or human activity, and the isotopic composition of the hydrogen and oxygen molecules in the snow give a record of the temperature of the earth at the time.

(By September, the Arctic area covered by sea ice was the third - lowest recorded since 1979 — the other record years were 2007 and 2008.)

The last seven years witnessed the seven lowest minimum extents since satellite observations began in 1979, and there was last a record high with Arctic ice cover two decades ago, according to federal data.

This year's Arctic sea ice cover currently is the sixth - lowest on modern record, a ranking that raises ongoing concerns about the speed of ice melt and the effects of ice loss on global weather patterns, geopolitical fights, indigenous peoples and wildlife, scientists said yesterday.

Researchers were astounded when, in the fall of 2007, they discovered that the year - round ice pack in the Arctic Ocean had lost some 20 percent of its mass in just two years, setting a new record low since satellite imagery began documenting the terrain in 1978.

In Greenland lead isotopes in ice cores reveal a record of lead pollution from Roman smelting in Spain some 2,000 years ago.

«That's the other remarkable thing about this research,» said Osterberg, «not only are we seeing strong agreement between the two Denali cores, we are finding the same story of intensified storminess recorded in ice cores collected 13 years and 400 miles apart.»

By piecing together an 18 - year record of ice shelf thinning from three different sets of satellite data, the researchers found that some ice shelves in West Antarctica have lost as much as 18 % of their volume in the last 2 decades.

«That is very exciting because a lot of interesting things happened with Earth's climate prior to 800,000 years ago that we currently can not study in the ice core record.»

Researchers have a record of atmospheric carbon dioxide stretching back millions of years thanks to ice cores from Antarctica, which contain trapped gas bubbles, snapshots of ancient air.

Winter sea ice has been at record lows for the past three years, according to the U.S. National Snow and Ice Data Centice has been at record lows for the past three years, according to the U.S. National Snow and Ice Data CentIce Data Center.

In contrast, Bierman and colleagues» data provides a record of continuous ice sheet activity over eastern Greenland but can't distinguish whether this was because there was a remnant in East Greenland or whether the ice sheet remained over the whole island, fluctuating in size as the climate warmed and cooled over millions of years.

In addition, the report notes that three of the warmest years on record — 2014, 2015 and 2016 — occurred since the last report was released; those years also had record - low sea ice extent in the Arctic Ocean in the summer.

Since that year the minimum ice cover has declined rapidly, dwindling to an all - time record low of 3.4 million square kilometers on September 16, 2012.

The team of researchers examined the hydroclimatic and societal impacts in Egypt of a sequence of tropical and high - latitude volcanic eruptions spanning the past 2,500 years, as known from modern ice - core records.

The record follows a trend over the past three years of anomalously high winter ice extents, providing a stark contrast to the inexorable decline of Arctic sea ice

May and June this year also saw record low sea ice levels, though the decline eased off in July.

The incident, which was monitored and recorded by satellite images, aerial photography and a research vessel navigating through the resulting icebergs, is the largest single event in a 30 - year series of ice shelf retreats in the area.

«Ice cores only tell you about temperatures in Antarctica,» Shakun notes of previous studies that relied exclusively on an ice core from Antarctica that records atmospheric conditions over the last 800,000 yeaIce cores only tell you about temperatures in Antarctica,» Shakun notes of previous studies that relied exclusively on an ice core from Antarctica that records atmospheric conditions over the last 800,000 yeaice core from Antarctica that records atmospheric conditions over the last 800,000 years.

Still, sea ice is far below the long - term average and stands to rank among the lowest years on record at its end - of - summer nadir.

«The iceberg is one of the largest recorded and its future progress is difficult to predict,» said Adrian Luckman, professor at Swansea University and lead investigator of Project MIDAS, which has been monitoring the ice shelf for years.

Arctic sea ice reaches its peak at the end of the winter; last year that winter peak set a record low.

They then used the satellite record of Arctic sea ice extent to calculate the rates of sea ice loss and then projected those rates into the future, to estimate how much more the sea ice cover may shrink in approximately three polar bear generations, or 35 years.

Arctic sea ice has hit a record low for the third year in a row.

Ice keeps a record of environmental changes as it accumulates over thousands of years, so the longer the core, the better.

In 2005, the European Consortium for Ice Coring in Antarctica (EPICA) drilled an ice core in Dome C on east Antarctica's plateau that stretches our record of the ancient atmosphere back 800,000 years (Quaternary Science Reviews, DOI: 10.1016 / j.quascirev.2010.10.00Ice Coring in Antarctica (EPICA) drilled an ice core in Dome C on east Antarctica's plateau that stretches our record of the ancient atmosphere back 800,000 years (Quaternary Science Reviews, DOI: 10.1016 / j.quascirev.2010.10.00ice core in Dome C on east Antarctica's plateau that stretches our record of the ancient atmosphere back 800,000 years (Quaternary Science Reviews, DOI: 10.1016 / j.quascirev.2010.10.002).

To piece together this puzzle, Yale University historian Joseph Manning and his colleagues first compared records of Nile River heights dating back to A.D. 622 with volcanic eruptions recorded in ice cores from Greenland and Antarctica that date back 2,500 years.

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.

We present a synthesis of decadally resolved proxy temperature records from poleward of 60 ° N covering the past 2000 years, which indicates that a pervasive cooling in progress 2000 years ago continued through the Middle Ages and into the Little Ice Age.

Once the LGM came to a close, however, the climate began to warm, the sea level rose and ice masses started melting away, allowing the Native American founder population to enter into North America nearly 15,000 years ago, according to the genetic record.

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.

NSIDC will issue a formal announcement at the beginning of October with full analysis of the possible causes behind this year's ice conditions, particularly interesting aspects of the melt season, the set up going into the winter growth season ahead, and graphics comparing this year to the long - term record.

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 record lowest extent in the 37 - year satellite record occurred on September 17, 2012 when sea ice extent fell to 3.39 million square kilometers (1.31 million square miles).

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.

This year's record low sea ice maximum extent might not necessarily lead to a new record low summertime minimum extent, since weather has a great impact on the melt season's outcome, Meier said.

This year's record low happened just two years after several monthly record high sea ice extents in Antarctica and decades of moderate sea ice growth.

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

«There are already places in the Andes, for instance, where records of the last 30 to 40 years have disappeared because of surface ice melting,» Rignot says.

The sea ice reached its maximum winter extent unusually early this year and has been falling fast, to a new record low for this time of year (see graph below).