Sentences with phrase «year ice core record»

Two likely stratospheric volcanic eruptions in the 1450s C.E. found in a bipolar, subannually dated 800 year ice core record.

Cole - Dai, J., D.G. Ferris, A.L. Lanciki, J. Savarino, and J.R. McConnell (2013) Two climate - impacting volcanic eruptions in the 1450s C.E. found in a bipolar, sub-annually dated 800 - year ice core record, J. Geophys.

Not exact matches

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.

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.

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.»

«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.

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.

«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.

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.

The ice core provides a complete record of the climate in the northern hemisphere over the past 250 000 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.

Paleoclimate: I don't know for sure, but this record is too long (1 million years) to be an ice core, so I'm guessing it's a stacked sediment core, showing delta - O18 from ocean foraminifera.

Sigl, M., J. R. McConnell, L. Layman, O. Maselli, K. McGwire, D. Pasteris, D. Dahl - Jensen, J.P. Steffensen, R. Edwards, R. Mulvaney (2013) A new bipolar ice core record of volcanism from WAIS Divide and NEEM and implications for climate forcing of the last 2000 years, J. Geophys.

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 present ice ages are the most studied and best understood, particularly the last 400,000 years, since this is the period covered by ice cores that record atmospheric composition and proxies for temperature and ice volume.

«The ice core record ends about 450 years ago, so the modern melt rates in these cores are the highest of the whole record that we can see,» Osterberg said.

The analyses of two ice cores from a southern tropical ice cap provide a record of climatic conditions over 1000 years for a region where other proxy records are nearly absent.

Atmospheric CO2 Over the Last 1000 Years: WAIS Divide Ice Core Record.

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

A 420 Year Annual 10Be Record from the WAIS Divide Ice Core.

An independent, annually dated ice core record of explosive volcanism from WAIS Divide synchronized to EPICA Dome C over the last 27,000 years.

Atmospheric CO2 over the last 1000 years: A high - resolution record from the West Antarctic Ice Sheet (WAIS) Divide ice coIce Sheet (WAIS) Divide ice coice core.

A new bipolar ice core record of volcanism from WAIS Divide and NEEM and implications for climate forcing of the last 2000 years.

Ice core records prove that current levels of carbon dioxide and methane, both important greenhouse gases, are higher than any previous level in the past 400,000 years.

@ 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.

A full 900,000 years of ice core temperature records and carbon dioxide content records show CO2 increases follow increases in Earth's temperature instead of leading them.

The so - called «Keeling Curve» of CO2 concentrations since 1958 looks like a spike against the 800,000 - year ice - core record of this atmospheric trace gas.

* Watanabe K., Kamiyama K., Watanabe O. & Satow K., 1998: Evidence for an 11 - year cycle of atmospheric H2O2 fluctuation recorded in an ice core at the coastal region, East Antarctica.

You may now understand why global temperature, i.e. ocean heat content, shows such a strong correlation with atmospheric CO2 over the last 800,000 years — as shown in the ice core records.

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.

The ice core record of the last 420,000 years shows exactly the opposite.

The marine coring record for the Arctic suggests that the Artic has never been (summer time) ice free for at least hundreds of millions of years; you'll have to find the papers and look at the extent of coverage yourself.

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.

Over the last 35 years, our research team has recovered ice - core records of climatic and environmental variations from the polar regions and from low - latitude high - elevation ice fields from 16 countries.

Or again, in the ice core records, temperature is clearly driving the CO2 levels with a lag of about 800 years.

Suffice it to say that the GISP2 ice core recorded temperatures much higher for most of the past 4,000 years.

Ice core records have a very bad resolution of about 20 - 30 years (ice age gas age) looking at the period 1925 - 1950, so it can not resolve a possible CO2 peIce core records have a very bad resolution of about 20 - 30 years (ice age gas age) looking at the period 1925 - 1950, so it can not resolve a possible CO2 peice age gas age) looking at the period 1925 - 1950, so it can not resolve a possible CO2 peak.

To answer the question of the Medieval Warm Period, more than 1,000 tree - ring, ice core, coral, sediment and other assorted proxy records spanning both hemispheres were used to construct a global map of temperature change over the past 1,500 years (Mann 2009).

The «hockey stick» describes a reconstruction of past temperature over the past 1000 to 2000 years using tree - rings, ice cores, coral and other records that act as proxies for temperature (Mann 1999).

An analysis of the GISP2 ice core record from Greenland reveals that abrupt climate events appear to be paced by a 1,470 - year cycle with a period that is probably stable to within a few percent; with 95 % confidence the period is maintained to better than 12 % over at least 23 cycles.

Past climates have left records in ice and ocean - sediment cores that provide some of the best available evidence.1 A couple of kilometres beneath the surface of the Antarctic and Greenland ice - sheets lies ice which has been there for tens of thousands of years.

... According to the marine records, the Eemian interglacial (William: Eemain is the name of the last interglacial period, the current interglacial period is called the Holocene) ended with a rapid cooling event about 110,000 years ago (e.g., Imbrie et al., 1984; Martinson et al., 1987), which also shows up in ice cores and pollen records from across Eurasia.

The ice core recovered from Vostok, Antarctica, records over 400,000 years of climate history.

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.

And according to scientists who have 800,000 years of carbon records derived from glacial ice core samples, there is a strong link between earth temperatures and increased carbon dioxide levels in the atmosphere.