Sentences with phrase «for ice core studies»

A Centrifuge - Based Technique for Dry Extraction of Air for Ice Core Studies of Carbon Dioxide.

Not exact matches

The researchers studied temperature measurements over the last 150 years, ice core data from Greenland from the interglacial period 12,000 years ago, for the ice age 120,000 years ago, ice core data from Antarctica, which goes back 800,000 years, as well as data from ocean sediment cores going back 5 million years.

For this study, researchers from Dartmouth and Boise State University spent two months on snowmobiles to collect seven ice cores from the remote «percolation zone» of the West Greenland Ice Sheice cores from the remote «percolation zone» of the West Greenland Ice SheIce Sheet.

«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.

Researchers at the Ohio State University are using a set of ice cores taken from Quelccaya as a «Rosetta Stone» for studying other ice cores taken from around the world.

Since then scientists have been studying samples of the bottom core for clues to what might lie beneath the ice.

For the new study, researchers collected two ice cores from Ellsworth Land, the strip of land that connects the Antarctic Peninsula to the rest of the continent.

Studying ice cores has provided a way to examine the biology of icy environments buried beneath kilometers of ice for millions of years.

Such fellowships have enabled Antarctic scientists to participate in a range of significant research including using ice cores to determine proxies for the Southern Annular Mode, a molecular study of Antarctic ostracods, and investigating particulate carbon and biogenic silica in sea ice in both the Arctic and Antarctic regions.

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 study I am citing is Alley and Anandakrishnan, 1995, «Variations in melt - layer frequency in the GISP2 ice core: implications for Holocene summer temperatures in central Greenland» published in the Annals of Glaciology for establishing the long - term frequency of melt events at Summit, Greenland.

The highly accurate ice core data sets rathr precise dates for three major (and tropical) eruptions for which previous studies by traditional methods of paleogeology gave only poorer approximations.

The ice core data for the past 800k years does support this study.

For years, scientists have studied tree rings and ice cores, looking for clues that could reveal whether the weather change was caused by a supervolcano (which have been known to cool the planet considerablFor years, scientists have studied tree rings and ice cores, looking for clues that could reveal whether the weather change was caused by a supervolcano (which have been known to cool the planet considerablfor clues that could reveal whether the weather change was caused by a supervolcano (which have been known to cool the planet considerably).

Through a combination of sediment cores analyses and ice - sheet modelling, the study shows that this area has probably been steadily leaking methane from hydrates for 8000 years.

Despite multiple careful studies, uncertainties in the ice — gas age differences for the Vostok ice core remain of the order of 1 kyr.

The research team for this study included ice - core specialists, atmospheric scientists, archaeologists, and economic historians — an unusual combination of expertise.

Sea ice does not provide ice for long term core studies.

Interpretation of such proxy records of climate — for example, using tree rings to judge occurrence of droughts or gas bubbles in ice cores to study the atmosphere at the time the bubbles were trapped — is a well - established science that has grown much in recent years.

This storage facility also acts as a library: when scientists want to study a certain ice core from a particular region, they can apply to have a portion of the ice core sent to them for their studies.

If only scientists had enough foresight, couldn't we have waited until we were able to get good ice cores, and settle the matter once and for all with a single unimpeachable study?

However, studies of paleoclimate proxies, such as tree rings and ice cores, have shown that oscillations similar to those observed instrumentally have been occurring for at least the last millennium.

Studies of the ice core retrieved by Russia's Vostok Antarctic station show that this is what has been happening on earth for at least the last 400,000 years.

For this study, researchers from Dartmouth and Boise State University spent two months on snowmobiles to collect seven ice cores from the remote «percolation zone» of the West Greenland Ice Sheice cores from the remote «percolation zone» of the West Greenland Ice SheIce Sheet.

Although it has been a common practice in studying paleoclimate data to use proxy data from, for example, an ice core in Antarctica, to represent global climate after dividing the former by a factor of ∼ 2 or by a model - determined, latitude - dependent scaling factor, theoretical justification is only beginning to be emphasized (22).

Two comprehensive chapters on dating methods provide the foundation for all paleoclimatic studies and are followed by up - to - date coverage of ice core research, continental geological and biological records, pollen analysis, radiocarbon dating, tree rings and historical records.

With regard to proxy studies, same basic questions, are these direct or passive correlations, what evidence that tree ring core thickness depends only on temperature (what about precipitation, cloud cover, volcanic activity, sea surface temperatue changes, sea current changes, solar irradiance changes, cloud cover, etc.) How are these variables accounted for when analysis of ice cores is completed, or for that matter when computer models, and / or proxy studies are completed.

I recall more than one guest lecture at our physics department's Centre for Global Change Studies displaying a graph of spectral analysis of temperature histories, with data from multiple time scale sources including thermometer records, ice core data, etc..