Sentences with phrase «of deep ice cores»

We show that DNA and amino acids from buried organisms can be recovered from the basal sections of deep ice cores, enabling reconstructions of past flora and fauna.

But few talks went without a slide showing the wiggly line of a deep ice core.

Not exact matches

«Most people assume that it's a question of just drilling deeper for ice cores, but it's not that simple,» said Edward Brook, an Oregon State University geologist and co-author on the study.

Enter a new breed of drill, designed to do fast, cheap reconnaissance instead of extracting a single, intact ice core, as previous deep drills have done.

It is only recently that very deep cores have been drilled — and three of them contain ice more than 160,000 years old.

Gard found similar fossils deeper down in the sediment cores, indicating that the Arctic ice partially cleared at various times from about 128 000 to 71 000 years ago — a period covering the latest interglacial and the early part of the latest ice age.

Analysing new data from marine sediment cores taken from the deep South Atlantic, between the southern tip of South America and the southern tip of Africa, the researchers discovered that during the last ice age, deep ocean currents in the South Atlantic varied essentially in unison with Greenland ice - core temperatures.

Understanding how that would affect the climate will require going beyond historical records of climate change, or even the information encoded in tree rings or ice cores, to what scientists call «deep time» records of conditions on Earth, according to a new NAS analysis.

Now, new evidence from a marine sediment core from the deep Pacific points to warmer ocean waters around Antarctica (in sync with the Milankovitch cycle)-- not greenhouse gases — as the culprit behind the thawing of the last ice age.

The simple fact is that every scientist now involved in climate science, from the study of isotope ratios in deep ice cores to the emission of methane from tropical forests, is not only a scientist, but a political commentator and activist.

Five millennia of surface temperatures and ice core bubble characteristics from the WAIS Divide deep core, West Antarctica.

The WAIS Divide deep ice core WD2014 chronology — Part 1: Methane synchronization (68 - 31 ka BP) and the gas age — ice age difference Climate of the Past, 11, 153 - 173

A state - of - the - art continuous ice core analytical system was used to analyze ~ 3 cm by ~ 3 cm longitudinal samples from ~ 1300 to ~ 3404 m depth in the recently collected WAIS Divide deep ice core from West Antarctica.

The WAIS Divide deep ice core WD2014 chronology — Part 1: Methane synchronization (68 - 31 ka BP) and the gas age — ice age difference Climate of the Past, 11, 153 - 173 \ nBuizert, C., and 15 others.

A state - of - the - art continuous ice core analytical system was used to analyze samples from ~ 1.5 to ~ 577 m depth in the recently collected WAIS Divide deep ice core from West Antarctica.

Here we present a chronology for the deep part of the core (67.8 - 31.2 ka BP), which is based on stratigraphic matching to annual - layer - counted Greenland ice cores using globally well - mixed atmospheric methane.

DEEP FREEZE: Petrenko holds a sample of ancient ice in his Ice Core Lab in Hutchison Haice in his Ice Core Lab in Hutchison HaIce Core Lab in Hutchison Hall.

Thin Section Analysis of the WAIS Divide Deep Ice Core.

Five millennia of surface temperatures and ice core bubble characteristics from the WAIS Divide deep core, West Antarctica, Paleoceanography, 31 (3), p. 416 - 433.

We've added another map, Outpost 92 — a frozen, deep core mining facility drowning in snow and ice, cut off in the face of an onrushing blizzard.

The PSP - 2000 was made available in Piano Black, Ceramic White, Ice Silver, Mint Green, Felicia Blue, Lavender Purple, Deep Red, Matte Bronze, Metallic Blue and Rose Pink as standard colors (not all colors were available in all countries), and had several special edition colored and finished consoles for games including Final Fantasy VII: Crisis Core (Ice silver engraved), Star Ocean: First Departure (Felicia Blue engraved), Gundam (Red gloss / matte black), and Monster Hunter Freedom (Gold silkscreened) PSPs in Japan, Star Wars (Darth Vader silkscreened) and God of War: Chains of Olympus (Kratos silkscreened) PSPs in North America, a The Simpsons (bright yellow with white buttons, analog and UMD drawer) PSP in Australia and New Zealand, and Spider - Man (Red gloss / matte black), and Final Fantasy VII: Crisis Core (Ice silver engraved) PSPs in Europe.

For Fred Singer, a climatologist at the University of Virginia and another co-author, the current warming «trend is simply part of a natural cycle of climate warming and cooling that has been seen in ice cores, deep sea sediments and stalagmites... and published in hundreds of papers in peer reviewed journals.»

1966 Emiliani's analysis of deep - sea cores shows the timing of ice ages was set by small orbital shifts, suggesting that the climate system is sensitive to small changes.

In my briefings to the Association of Small Island States in Bali, the 41 Island Nations of the Caribbean, Pacific, and Indian Ocean (and later circulated to all member states), I pointed out that IPCC had seriously and systematically UNDERESTIMATED the extent of climate change, showing that the sensitivity of temperature and sea level to CO2 clearly shown by the past climate record in coral reefs, ice cores, and deep sea sediments is orders of magnitude higher than IPCC's models.

These bubbles had disappeared completely by 1100 meters, most probably as a result of the diffusion of gas molecules into the ice lattice, and this, together with the formation below 1200 meters of an oriented crystal fabric (characterized by a strong vertical orientation of crystallographic c axes) is believed to be responsible for the greatly increased ductility of the deeper cores.

Two papers report analyses of this deep ice, including the lowest carbon dioxide concentration so far measured in an ice core.

Study of the ice core recovered by Russian scientists from deep Antarctic holes has revealed that in the last 450,000 years the Earth has had at least four peaks of temperature upsurge with fluctuations of 10 to 12 degrees.

Scientists dig deep into the rock and sand of the sea floor to sample Earth's climate history many millions of years ago, since the oldest ice cores go back only 850,000 years.

I have some knowledge of biological processes and indeed, bacteria are at work even somewhere at the most harsh places on earth: from boiling geisirs to deep freezing ice cores...

There are some detailed pages of information that have been meticulously reconstructed after having passed through the cross-cut shredder of geological history: the information from ice cores and the deep sea sediment cores are obvious examples.

... The evidence comes from a close correlation between inferred changes in production rates of the cosmogenic nuclides carbon - 14 and beryllium - 10 and centennial to millennial time scale changes in proxies of drift ice measured in deep - sea sediment cores.

Tree rings, coral skeletons, and glacial ice cores (Figure 3) are proxies for annual temperature records, while boreholes (holes drilled deep into Earth's crust) can show temperature shifts over longer periods of time.

(28) + The emerging picture of severe instability was reinforced by studies of cores drilled from the Greenland and Antarctic ice caps, and by deep - sea cores that covered much longer times.

Yesterday I found another beautiful «photo of a slice through a core at the deep end of the ice.

A few additions: — While coastal ice cores reflect the temperatures of the nearby Southern Ocean (via dD and d18O proxies), the deep inland, high altitude, ice cores of Vostok and Epica Dome C reflect the ocean temperatures for near the whole SH.

The temporal variation of the GHG plus surface albedo climate forcing closely mimics the temporal variation of either the deep ocean temperature (figure 6) or Antarctic temperature [5,31] for the entire 800000 years of polar ice core data.

Methane clathrates are also present in deep Antarctic ice cores, and record a history of atmospheric methane concentrations, dating to 800,000 years ago.

The issue, beyond the core data representing but a single geospacial location and thus by itself not representative of the whole (and much larger) region in which it resides, is that the core is near the Greenland summit (in order to get the deepest profile of the ice possible) and therefore at an elevation of over 2 miles above sea level.

The reference you provided didn't answer that question as the samples were not deep enough in the ice / firn to have been exposed to the presssures of typical ice core samples..

Imputities are a main problem in Greenland ice cores where a mix of seasalt / carbonate and acidic dust from Icelandic volcanoes can produce CO2 in situ, but is less of interest in deep inland Antarctic ice cores, except during the deepest times of glacials, when far more dust is deposited.

In 2008, research on Antarctic Vostok and EPICA Dome C ice cores revealed that methane clathrates were also present in deep Antarctic ice cores and record a history of atmospheric methane concentrations, dating to 800,000 years ago.

The main problem in deep ice cores is the formation of clathrates, where CO2 (and N2 or O2) can hide, even if crushed under vacuum.

This paper, cosignated by Bard as last author, seems to be the paper too much, too much, trop trop trop for him; it has a smell of pine tree (or coffin) as that of the «scientific» carrier of M.Mann It looks a bit bizarre to me that it would be revolutionnary that temperatures of Northern Atlantic and tropical environments do not lag that of polar environments and ice, while the sun irradiates more the poles to the detriment of tropical latitudes; really, as long, as they do not demonstrate that CO2 does not lag temperature in ice cores, there is nothing new; and if they do, we are waiting for the explanations of vice président Jouzel to find the source of CO2 before the deep polar oceans started to moove

Micro bubbles found in deep polar ice cores of the ancient atmosphere (1 - 200,000 years ago) showed a higher atmospheric density than now, perhaps 2 atmospheres, also higher water vapor and CO2.

There must have been brief periods of very rapid temperature change mixed in there (certainly on the regional level) in addition to slower - warming periods, and I'm under the impression other data (such as Greenland ice cores and deep - sea cores) support that scenario as well.

1966 Emiliani's analysis of deep - sea cores and Broecker's analysis of ancient corals show that the timing of ice ages was set by small orbital shifts, suggesting that the climate system is sensitive to small changes.

Reconstruction of millennial changes in dust emission, transport and regional sea ice coverage using the deep EPICA ice cores fromthe Atlantic and Indian Ocean sector of Antarctica.

These estimates resulted from studies of air bubbles recovered in ice cores from deep within Antarctica, Greenland and other glaciers, as well as chemical analyses of coral samples from beneath the sea.

His personal contribution to these programmes encompasses a very large spectrum of topics from a direct involvement in deep drilling activities to the more theoretical aspects of the interpretation of ice core data.

Nice plot: http://www.climate-change-theory.com/planetcycles.jpg When do you expect the next deep freeze that empties 125m of water from the seas to ice in the polar and N / S latitudes per the Ice Core 120,000 y cycling patteice in the polar and N / S latitudes per the Ice Core 120,000 y cycling patteIce Core 120,000 y cycling pattern?