Sentences with phrase «over the ice core»

You can measure acidity in the ice by simply passing an instrument that can measure conductivity over the ice core.

[Response: Possibly he means rapidly as in «more rapid than at any time over the ice core records»?

I mention this since some global warming science sites show instrument data superimposed over the ice core data.

Not exact matches

Sedimentary layers, stalact.ites, water erosion over time, ice core data, tree rings, isotope decay rates.

Nye's first two examples basically blew apart the whole creationist argument — we have ice cores that demonstrate a history of over 680,000 years.

I could go on, but the fact of the matter is, if you use just the bible to map out a timeline it's a little wonky but doable because for over 2000 years its had revisions and edits so that it would make more sense, if you want to really look the history of the world through geology, ice core samples and what not, it'll paint a very different picture.

1) Mix flour, butter and icing sugar in a bowl using two knives to cut the butter until the mixture resembles fine breadcrumbs 2) Add in the egg yolks and vanilla extracts and mix well, then add iced water until the dough starts to come together 3) Shape the dough into a ball on a cool, flat, floured surface 4) Flatten dough into a disc and then wrap in plastic wrap, and chill in the refrigerator for at least 30 minutes 5) Meanwhile, peel, core and slice the apples into as thin slices as possible 6) Mix sugar and ground cinnamon powder with sliced apples and let it rest for a while 7) Pre-heat oven to 180 deg cel 8) Once dough has chilled, roll pastry dough on a sheet of parchment paper until it has expanded to the size of the tart mold (I used a rough mold the size of a large pizza) 9) Leaving at least an inch of dough free, arrange apple slices by overlapping them slightly in the shape of a circle, starting from the outermost part of the circle, until you reach the inside 10) Fold the edges of dough over the filling and then sprinkle the dough with a bit of sugar 11) Bake for about 40 - 45 minutes, or until the crust is golden brown and the apples are soft 12) Serve warm, with a side of whipped cream or ice cream (optional)

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.

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.

An ice core is a core sample from the accumulation of snow and ice over many years that have recrystallized and have trapped air bubbles from previous time periods.

Growth rates for concentrations of carbon dioxide have been faster in the past 10 years than over any 10 - year period since continuous atmospheric monitoring began in the 1950s, with concentrations now roughly 35 percent above preindustrial levels (which can be determined from air bubbles trapped in ice cores).

Lancaster University scientists worked with colleagues from China and Germany to collect and analyse samples from ice cores which had been laid down over 30 years, to show how residues of Perfluoroalkyl substances (PFASs) in the environment have changed over time.

Using data from 16 ice cores collected from widely spaced locations around the Antarctic continent, including the South Pole, a group led by Joe McConnell of the Desert Research Institute (DRI) in Reno, Nevada, created the most accurate and precise reconstruction to date of lead pollution over Earth's southernmost continent.

It is much cheaper to test ice cores, which capture years of data in one core, than to do repeated air sampling over time.

Researchers at Princeton University analyzed ice cores collected in Greenland and Antarctica to determine levels of atmospheric oxygen over the last 800,000 years.

The levels of chemicals related to metallurgy in the ice core gradually rose and plateaued over the next few decades, until around 1830.

By reading the ups and downs of organic versus nonorganic sediment in a core, sedimentologists can follow the retreats and advances of ice over the past 20,000 years.

«Ice cores reveal a slow decline in atmospheric oxygen over the last 800,000 years.»

Ice cores from Mount Hunter in Alaska's Denali National Park and Mount Logan in Canada were used in an analysis of over 1,000 years of history of the Aleutian Low pressure system that drives storm activity in the North Pacific.

Comparing layers in the ice - core samples and ocean sediments has allowed researchers to deduce e.g. how the average temperature on Earth has changed over time, and also how great the variability was.

«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.

By comparing the EPICA air bubbles data to that from other ice cores and marine sediments, researchers can create a reliable picture of the climate over time.

The ice core data also shows that CO2 and methane levels have been remarkably stable in Antarctica — varying between 300 ppm and 180 ppm — over that entire period and that shifts in levels of these gases took at least 800 years, compared to the roughly 100 years in which humans have increased atmospheric CO2 levels to their present high.

As yet, no one has touched the waters of a subglacial lake with so much as a drill bit, but a Russian group that has been coring ice over Lake Vostok to get ancient climate records is coming close.

Finally, Manning and colleagues pored over historical texts from Ptolemaic Egypt, comparing periods of unrest with the volcanic record in the ice cores.

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

«We have run the model over a simulated period of three million years, and taken into account measurements from ice cores and independent magnetic and seismic data,» says Petrunin.

Researchers also think it's possible that over thousands of years, the diamonds slowly sink through the planets» ice layers and assemble into a thick layer around the core.

In the past decade, paleoclimatologists have reconstructed a record of climate change over the last millennium by consulting historical documents and examining indicators of temperature change like tree rings, as well as oxygen isotopes in ice cores and coral skeletons.

The Russians had drilled to a depth of over 2,000 meters and recovered an ice core that went back 420,000 years.

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

Ice core records are rich archives of the climate history during glacial - interglacial cycles over timescales of up to ~ 800 kyr before the current age.

But the 100 ice core samples in Greenland and Antarctica going back 800,000 years including over two dozen inter-glacials when large differences in CO2 levels and temperatures were measured.

Severinghaus discovered that xenon and krypton are well preserved in ice cores, which provides the temperature information that can then be used by scientists studying many other aspects of the earth's oceans and atmosphere over hundreds of thousands of years.

Ice cores provide evidence for variation in greenhouse gas concentrations over the past 800,000 years.

Ice core records show that atmospheric CO2 varied in the range of 180 to 300 ppm over the glacial - interglacial cycles of the last 650 kyr (Figure 6.3; Petit et al., 1999; Siegenthaler et al., 2005a).

Despite the difficulties, analyses of ice core and ocean sediment cores has shown periods of glacials and interglacials over the past few million years.

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.

Development and comparison of layer - counted chronologies from the WAIS Divide and EDML ice cores, Antarctica, over the last glacial transition (10 - 15 ka BP).

Sulfate sources and oxidation chemistry over the past 230 years from sulfur and oxygen isotopes of sulfate in a West Antarctic ice core.

Previous research by Box using ice cores — long cylinders drilled out of the ice sheet that let scientists sample hundreds of years of ice layers — showed that in the past, snowfall has increased over the ice sheet as temperatures have risen.

Seasonal to centennial - scale variability of microparticle concentration and size distribution in the WAIS Divide ice core over the past 2.4 ka.

Changes in atmospheric carbonyl sulfide over the last 54,000 years inferred from measurements in Antarctic ice cores, Journal of Geophysical Research: Atmospheres, 121, p. 1943 - 1954.

Depositional phasing of volcanic aerosols in the WAIS Divide ice core over the past 2400 years.

Ice core paleoclimate isotope data are indirect indications of temperature (proxies) over millions of years compared to instrumental temperature measurements with high resolution of hours, days and decades.

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.

Ice - core Records of Atmospheric Halogen Concentrations over Western Antarctica - Past and Present.

Marine bacteria in deep Arctic and Antarctic ice cores: a proxy for evolution in oceans over 300 million generations.