Sentences with phrase «global ice core»

Of course, no one is trying to make a prediction based on global ice core data.

Of course, no one is trying to make a prediction based on global ice core data.

Not exact matches

We have much better — and more conclusive — evidence for climate change from more boring sources like global temperature averages, or the extent of global sea ice, or thousands of years» worth of C02 levels stored frozen in ice cores.

Since the ice sheet would have floated away in the event of a global flood, the ice core is strong evidence that there was no global flood any time in the last 110,000 years.

On top of that geologists have shown from seabed core samples and ice core samples that there was no global flood.

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.

Climate scientists find the last glacial period interesting because ice cores in Greenland and ocean sediment cores have shown that during this period there were sharp shifts in global temperatures.

They range from LANDSAT images of land use in the Chesapeake Basin, to fish catches off California since the 1920s, to 400,000 years of global temperature estimates from antarctic ice cores.

Why do some ice core samples seem to indicate CO2 spikes trailed increases in global temperature?

This conclusion, based on ice - core studies, implies that East Antarctica is more sensitive than it seemed to global warming.

New ice core research suggests that, while the changes are dramatic, they can not be attributed with confidence to human - caused global warming, said Eric Steig, a University of Washington professor of Earth and space sciences.

«Detailed chemical measurements in Antarctic ice cores show that massive, halogen - rich eruptions from the West Antarctic Mt. Takahe volcano coincided exactly with the onset of the most rapid, widespread climate change in the Southern Hemisphere during the end of the last ice age and the start of increasing global greenhouse gas concentrations,» according to McConnell, who leads DRI's ultra-trace chemical ice core analytical laboratory.

Ice cores from Greenland and West Antarctica suggest that average global temperatures quickly shot up during that time.

Ice core data from the poles clearly show dramatic swings in average global temperatures, but researchers still don't know how local ecosystems reacted to the change.

Ice cores must be extracted before global warming melts them.

Ice cores show CO2 increases lag behind temperature rises, disproving the link to global warming

These events, known as Dansgaard - Oeschger events, were first identified in data from Greenland ice cores in the early 1990s, and had far - reaching impacts on the global climate.

«The first step was to reconstruct the history of global mean temperatures for the last 784,000 years, using combined data from marine sediment cores, ice cores, and computer simulations covering the last eight glacial cycles,» said Friedrich, a post-doctoral researcher at IPRC.

Samsung Galaxy S III (Credit: CNET) Just days ago, Samsung announced the Samsung Galaxy S III, the global, quad - core, Android Ice Cream Sandwich successor to its best - selling smartphone ever, the Galaxy S II.

To date therefore, a combination of insufficient resolution in marine and terrestrial sediments bearing the YTT and a lack of YTT ash in the polar ice cores has prevented precise evaluation of the YTT's impact on global climate and hominin populations.

The positions of the sulfate peaks in both northern and southern hemisphere ice cores at the start of the ∼ 1,000 y stadial between Dansgaard - Oeschger events 19 and 20 has been widely used within climate models (9, 14) and archaeological debate (12, 13, 19) to infer that the Toba eruption triggered devastating global cooling.

[Response: Alastair, I did not mean to say you were confused, but often people mix up global mean changes with the abrupt regional changes seen e.g. in the Greenland ice cores.

Christner has examined microbial life in ice cores from Vostok and many other global locations.

Puncak Jaya is the only place to get ice core data from the western side of what's known as the Pacific Warm Pool the single largest heat source to the global atmosphere.

So those who want to sell anthropogenic global warming like the ice core records because they tell the «right» story, and those who want to discredit the theory pick the leaf stomata evidence, because that tells the «right» story.

The stack of 57 globally distributed benthic δ18O marine records (dark grey), a proxy for global ice volume fluctuations (Lisiecki and Raymo, 2005), is displayed for comparison with the ice core data.

Global cooling after volcanic eruptions has been recorded in ice core data and thermometers,: 1809, 1815, 1883, 1980 etc. and others.

It is important to remind everyone that i) we expect CO2 to lag behind temperature in ice core records, because of feedbacks, and ii) that the Antarctic cores are not a global temperature record.

[Further Response: Our estimates of the magnitude of future global warming do not come from ice core data, and do not depend on it in any way.

We can predict a GLOBAL temperature within ---- degrees based on 600,000 year old ice core samples.

Plotting GHG forcing (7) from ice core data (27) against temperature shows that global climate sensitivity including the slow surface albedo feedback is 1.5 °C per W / m2 or 6 °C for doubled CO2 (Fig. 2), twice as large as the Charney fast - feedback sensitivity.»

More recent studies, with much more precise correlation between ice cores and global temperature records, have shown that temperature and CO2 changed synchronously in Antarctica during the end of the last ice age, and globally CO2 rose slightly before global temperatures.

Ice Core Evidence to support a Paleo Global Monsoon.

The LG Spectrum 2 is said to feature a 4.7 ″ True HD IPS display, a 1.5 GHz dual - core Snapdragon S4 processor, 1 GB of RAM, 16 GB of internal storage, an 8 - megapixel rear camera, NFC capabilities, Android 4.0.4 Ice Cream Sandwich, Verizon 4G LTE connectivity, international GSM and UMTS support for global roaming.

But in the last (ice age) global warming 123,000 years ago, ALL the ice in central Greenland melted - the proof being that the ice cores stop / hit bedrock at that time.

On a related note: Does anyone here know where the best source would be for getting a detailed chart of Be-10 concentrations from ice cores plotted against global temps during the past 10,000 years?

The authors compared recently constructed temperature data sets from Antarctica, based on data from ice cores and ground weather stations, to 20th century simulations from computer models used by scientists to simulate global climate.

Dr. Zbigniew Jaworowski — world - renowned expert on the ancient ice cores used in climate research — says the U.N. «based its global - warming hypothesis on arbitrary assumptions and these assumptions, it is now clear, are false.»

After scientists have done the hard work of working out these relations, it is possible to use one ice - core record to represent broader regions IF you restrict consideration to the parts that are widely coherent, so it is O.K. to plot a smoothed version of an Antarctic temperature record against CO2 over long times and discuss the relation as if it is global, but a lot of background is required.

Further to 13 (although I'm not so sure that George's message is a response to mine), a mode of explanation seen at What does the lag of CO2 behind temperature in ice cores tell us about global warming?

«the European Project for Ice Coring in Antarctica (EPICA) established a precise link between climate records from Greenland and Antarctica using data on global changes in methane concentrations derived from trapped air bubbles in the ice.&raqIce Coring in Antarctica (EPICA) established a precise link between climate records from Greenland and Antarctica using data on global changes in methane concentrations derived from trapped air bubbles in the ice.&raqice.»

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.

[Further Response: Our estimates of the magnitude of future global warming do not come from ice core data, and do not depend on it in any way.

It is important to remind everyone that i) we expect CO2 to lag behind temperature in ice core records, because of feedbacks, and ii) that the Antarctic cores are not a global temperature record.

I read your article «What does the lag of CO2 behind temperature in ice cores tell us about global warming?»

-- According to several Antarctic ice cores, there was a ~ 10 ppmv drop in CO2 between the MWP and LIA, this points to a ~ 1 K drop in global temperature, which is more in line with the higher variable reconstructions.

Over the past millennium this graph, most of which is obtained from Antarctic ice cores, shows CO2 holding steady at 280 ± 5 ppm up to 1800, when global population was about a billion people and sailing ships and the horse - and - buggy were the most advanced forms of transportation, consuming relatively little energy per capita compared with today.

The graph is created by Andy Jacobson from the NOAA and includes a global map displaying where the measurements are coming from, a comparison of Mauna Loa CO2 to South Pole CO2 and the graph expands at the end to include ice core measurements back to the 19th Century.

So, while my over interpretation has lead to a clear error in relationshipt to the dominant source of Greenland precipitation by placing it to far north, it does not effect the conclusion that Greenland ice cores are a regional, not a hemispheric or global proxy.

As a result, ice cores are a regional (not hemispheric, and certainly not global) temperature proxy.