Sentences with phrase «ice record back»

... We've used a range of new data sources to fill gaps and extend the Arctic sea ice record back to 1850.

Not exact matches

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.

This is the furthest back that the ice front has been in recorded history.

Their results overcome a basic problem of trying to discern the deep history of ice from bedrock: every time an ice sheet retreats and then grows back, it scours away the bedrock and the isotope record of its own past.

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.

Current research methods such as ice - core drilling can produce high - quality records of aerosols and soot going back centuries and even millennia, he says, and «these written accounts provide a good complement» to the data.

The commercial whaling boats recorded sea ice and weather data in more than 400 logbooks from voyages dating as far back as the 1840s, with most taking place from the mid-1800s to the early 1900s.

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.

Methane changes much more quickly than CO2 in the ice core records, through the Younger Dryas for example, which lasted 1000 years, methane goes back to glacial values while CO2 sort of hovers in place.

To reach further back in time and provide a long - term record that can inform global climate models, scientists are turning to other means of measuring ice mass.

A new analysis of a Martian rock that meteorite hunters plucked from an Antarctic ice field 30 years ago this month reveals a record of the planet's climate billions of years ago, back when water likely washed across its surface and any life that ever formed there might have emerged.

Fetterer — who recently wrote a guest article for Carbon Brief on piecing together a record of Arctic sea ice back to 1850 — also says the study highlights how important it is to find and preserve old observations:

More climate stories ripped out of the back pages of the news: NASA says the record low Arctic sea ice levels in the last few years are the new normal.

At close to 8,000 cubic kilometres (cubic km), total sea ice volume in November stood at just 48 % of the long - term average and the smallest of any November in the satellite record stretching back to 1979.

Pushed from center stage by the expected record arctic ice and permafrost melt, tropical rain forest destruction has been elbowing its way back through the smoke and into view.

The exhaust system of the new GT Speed has been developed from the free - breathing, low back pressure design first used on the Continental Supersports Ice Speed Record car.

«Performing the original Final Symphony with the LSO back in 2013 was a musical dream come true, and recording the album at Abbey Road Studios was the icing on the cake.

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.

@ Michael Lewis (not that he's still listening) «Ice core records go back thousands of years, but are not helpful in the past 2,000 years.»

Methane changes much more quickly than CO2 in the ice core records, through the Younger Dryas for example, which lasted 1000 years, methane goes back to glacial values while CO2 sort of hovers in place.

Sea ice extent has tracked below 2007 for 100 days, but yesterday it came back above the 2007 daily record.

So I had to back up the story of my trip to Alaska with satellite data on sea ice, and I had to justify my pictures of disappearing glaciers in the Andes with long - term records of mass balance of mountain glaciers.

Jack, given that we are dealing with a system that has a lot of variability in it, exactly how is one to draw any comfort that the record low ice extent and second lowest extent occur in back - to - back years?

Current concentrations of atmospheric carbon dioxide and methane far exceed pre-industrial values found in polar ice core records of atmospheric composition dating back 650,000 years.

My colleagues and I were using what we call proxy records, like corals and tree rings, and ice cores to try and extend the climate record back in time so that we could learn more about natural climate variability.

Back then, what she and a colleague found was not only groundbreaking, it pretty accurately predicted what is happening now in the Arctic, as sea ice levels break record low after record low.

The Little Ice age thermometers collected on my site demonstrates the Earths amazing climate variability, captured all the way back to 1660 by instrumental records.

An ice core - formed by compaction of previous snowfalls - constitutes a historical record of the local climate and atmosphere stretching back over thousands of years.

By drilling into the ice, it is possible to go back in time, year by year, and see a record of past climatic conditions in Antarctica.

It marks the end of a record breaking 7 month stretch where the lakes were covered in at least one ice cube, which is the longest period since satellite records began back in the 70's.

-LSB-...] see this again in the ice core record going back thousands of years (as I noted in this post).

Repeated annual measurements of key glaciers maintains a long - term record of change in the Antarctic that goes back to NASA's Ice, Cloud and Land Elevation Satellite (ICESat) which stopped collecting data in 2009.

-- Arctic sea ice didn't set a record for the annual minimum, but in October and November when sea ice normally starts growing back, it didn't.

That ice core record now extends back 800,000 years, which is about 4x longer than modern humans have existed.

Conditions may potentially rival the 2007 record minimum, if the majority of the remaining first - year ice disappears and some second - year ice at lower latitudes melts back between now and the September minimum.

The regional contributions this month suggest that ice conditions will be below normal relative to the past two to three decades, and that they may potentially rival the 2007 record minimum if multi-year ice at lower latitudes melts back early in the season.

And scientists can sample ice cores, permafrost records, and tree rings to make some assumptions about the sea ice extent going back 1,500 years.

According to NOAA's 2012 Arctic Report Card, the duration of melting at the surface of the ice sheet in summer 2012 was the longest since satellite observations began in 1979, and the total amount of summer melting was nearly double the previous record, set in 2010 (satellite records of melting go back to 1979.)

YES — CO2 HAS BEEN ON AN UPWARD CLIMB, to levels above those seen for the last few ice ages (with the proviso that ice cores records have poorer resolution the further back in time one goes; there may have been short - lived CO2 spikes that we can not see); is all of that human - driven, or is there a natural warming trend driving the release of biotic CO2?

Going back even farther, I. V. Polyakov and others examined Russian historical records of Arctic sea ice extent and thickness starting from the year 1900.

There are temperature records from ice cores going back almost a million years.

Antarctic ice is at a record high, Arctic sea ice is back to normal, and at current rates Greenland would not melt for 13,000 years.

«The 100 - year historical record from ships and settlements going back to 1900 shows a decline in ice extent starting about 1950 and falling below pre-1950 minima after about 1975.»

This method allowed them to see further back than the precision records preserved in cores of polar ice, which go back only 800,000 years.

In reality, by 2012 ice quickly came back and even surpassed the 1979 readings, reaching a new record maximum in the Antarctic in 2014.

Paleoclimatological records are studies of past climate from records that are from proxy data, from ice cores, tree rings, sediments, and they go back thousands of years in the past.

«This is the furthest back that the ice front has been in recorded history.

Back then, Palin was the governor of a state where «coastal erosion, thawing permafrost, retreating sea ice, record forest fires, and other changes are affecting, and will continue to affect, the lifestyles and livelihoods of Alaskans,» as she wrote (in a 2007 administrative order creating the state's Climate Change Sub-Cabinet).

There are ice core records with 50 - year resolution going back to 1000AD: http://cdiac.ornl.gov/trends/co2/graphics/lawdome.gif.