Sentences with phrase «ice core data for»

It is not possible to calculate the effect of anthropogenic CO2 until we know within closer limits what the natural variation is.For example if you look at the ice core data for the Holocene and if you believe that CO2 is the climate driver you would have to conclude that on a scale of thousands of years CO2 was an Ice House — not a green house gas.For the data and an estimate of the coming cooling for the next few hundred years check the post» Climate Forecasting for Britain's Seven Alarmist Scientists and for UK Politicians.»

Look at the Ice Core data for the past ten thousand years http://popesclimatetheory.com/page9.html

Assuming the paleoclimatic evidence (ice core data for example) for the temperature / CO2 correlation is resonably accurate, it is apparent that climate shifts from warming to cooling at CO2 peaks (maximum «forcing») and from cooling to warming at CO2 troughs (minimum «forcing»).

variability and CO2 levels, their use for absolute CO2 levels in the bulk of the atmosphere is very limited and they certainly don't refute the ice core data for average CO2 level over the period of resolution of the ice cores...

There is ice core data for Antarctica that goes back 800 thousand years.

That shows up in the ice core data for Greenland and Antarctic.

We have ice core data for thousands of years.

This cycle is clearly in the ice core data for Greenland and the Antarctic.

I find it amazing that when Al Gore graphed the ice core data for temperature then plotted the CO2 on a separate chart below it and never bothered to line up the time scale to show the lags of hundreds of years.

Look at the ice core data for the past ten thousand years.

We are at or near the upper boundary of temperature as shown in the ice core data for the past ten thousand years.

But samples taken on seaships over the oceans or coastal with wind from the seaside, show levels around the ice core data for the same period.

The graph includes ice core data for CO2 levels before 1950.

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

It includes ice core data for CO2 levels before 1950.

Not exact matches

To calculate the correlation during the Little Ice Age, researchers compared the core data with proxies for precipitation data, such as data from tree rings, cave formations and other natural records.

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.

«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.

The paleoclimate data, which included mainly changes in the oxygen isotopes of the calcium carbonate deposits, were then compared to similar records from other caves, ice cores, and sediment records as well as model predictions for water availability in the Middle East and west central Asia today and into the future.

Readers can look for themselves at the Greenland ice core record and decide whether there's anything of consequence going on around 41K before present that looks any different from other glacial - interglacial cycles.You can look at the GISP data yourself by downloading

Analysis of data also shows that Ceres has a water - ice mantle surrounding a rocky core, and that there may still be at least pockets of liquid water beneath the surface, raising the prospect of potential habitability for microorganisms, as seemingly unlikely as that may sound for a world so far from the Sun.

I thought that, according to the Vostok ice core data, the Antarctic has been warming up for the last 12k - yr.

Other tree ring data, 10 Be data, orbital satellite data, borehole data, ice coring data, etc. show, for example, the lengthy medieval warming which is practically absent from the hockey stick.

For example see figure 1 in Alley's paper that shows the GISP2 ice core data (The wiggle lines indicate a massive increase in sea salt and dust that is being transported to the Greenland Ice sheet, as compared to the current climaice core data (The wiggle lines indicate a massive increase in sea salt and dust that is being transported to the Greenland Ice sheet, as compared to the current climaIce sheet, as compared to the current climate.

These data are the accumulation rate history for the WAIS Divide ice core in central West Antarctica.

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.

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.»

Ice core data from Antarctic from ocean sediments show 8 episodes of very large ice flux — largest 14,600 years ago, meltwater pulse 1a — 1 - 3 meters sea level rise per century for several centuriIce core data from Antarctic from ocean sediments show 8 episodes of very large ice flux — largest 14,600 years ago, meltwater pulse 1a — 1 - 3 meters sea level rise per century for several centuriice flux — largest 14,600 years ago, meltwater pulse 1a — 1 - 3 meters sea level rise per century for several centuries.

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We also include data from the new WAIS Divide ice core that goes back 2000 years (actually, this core goes back to 68,000 years, and is annually resolved back to at least 30,000 years, but that's a story for another time).

There are also some technical reasons for that (for instance, for some proxies, such as lake sediments or ice cores, it is harder to retrieve the most recent data).

In the subtropical Himalayas, there is evidence from ice - core isotopic data and from nearby stations for unusual 20th century warming [Thompson et al, 2003].

The work by Vinther and colleagues in Southern Greenland is therefore key to helping calibrate the Greenland ice core records, and impressively, the correlations to the older data are as good as to the recent record, allowing us to have a little more confidence in the even longer term proxy data for this region.

See the GISP2 Ice core charts of temperature for the last 10,000 years -LRB-- data available at WDC) where it shows that the normal cooling and warming mode is for a rapid temperature change of 1.5 to 2 degrees within a few hundred years.

For example, if you examine the ice core data, say from Vostok station http://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/ you may find many episodes with «bizzare» behavior.

For example, the following paper http://ocean.mit.edu/~cwunsch/papersonline/milankovitchqsr2004.pdf finds that deep - sea and ice core records are formally indistinguishable from stochastic data even if the data are artificially tuned to Milankovitch cycles.

For one thing, the timing with the industrial revolution is hard to dismiss as a coincidence, especially since it is known that CO2 levels haven't been as high as they are now for at least ~ 1 million years (over which we have very good data from ice cores) and likely for the last 20 million yeaFor one thing, the timing with the industrial revolution is hard to dismiss as a coincidence, especially since it is known that CO2 levels haven't been as high as they are now for at least ~ 1 million years (over which we have very good data from ice cores) and likely for the last 20 million yeafor at least ~ 1 million years (over which we have very good data from ice cores) and likely for the last 20 million yeafor the last 20 million years.

«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.»

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.

Maya: for the longest direct record of CO2, look at the EPICA Dome C ice core data.

You would have to check ice cores for methane data at that time, but I'm fairly sure that CO2 didn't go above 290 ppm.

For example see figure 1 in Alley's paper that shows the GISP2 ice core data (The wiggle lines indicate a massive increase in sea salt and dust that is being transported to the Greenland Ice sheet, as compared to the current climaice core data (The wiggle lines indicate a massive increase in sea salt and dust that is being transported to the Greenland Ice sheet, as compared to the current climaIce sheet, as compared to the current climate.

Atmospheric CO2 is estimated by IPCC to have been around 290 ppmv in 1901 (based on ice core data) and was measured at 369 ppmv in 2000 (at Mauna Loa), for a 27 % increase.

If the CO2 curve is extended with ice core data, the rise in the peaks follows the carbon dioxide rise for 160 years.

You can't take data for a couple of hundred years and screech that «this matters more and is gonna kill us all» when we have ice core samples that show conditions much worse than this in the distant past.

data from ice cores shows that temperature has been regulated inside the same bounds for ten thousand years.

Ernst, can you explain the calibration technique of the instruments for ice core data?

It holds for 50 years of CO2 increase at MLO, for 150 years of temperature / ice core data, for 600 years of coralline sponges...

Thus if one plots all the minima of the different historical measurements, that gives a better impression of the real «background» CO2 level than the averages: see The same for ocean data and coastal data: all are around the ice core level.

That is the case for Buch's measurements, except for the trip to Spitsbergen and back which had an enormous variability (even there with the ice core data within the range).