Sentences with phrase «vostok ice core temperature»

Here is an overlay of the Vostok ice core temperature and the associated CO2 levels.

Similarly, I've got the Vostok ice core temperature record heading your way soon.

Not exact matches

The end of an ice age is associated with about 10 - 20 F ° of temperature rise, according to interpretations of the Vostok ice cores.

Further, in more recent times, there is a very close CO2 - temperature relationship in the Vostok (and other) ice cores.

He brings up quite a bit of the «CO2 lags temperature in the Vostok ice core» stuff which has been thorouhgly refuted (at least in the context that this is contradictory to AGW).

Considering the vostok Ice core the equilibruim CO2 level is a fairly linear function of temperature (9.8 ppm / K) I agree that the pre-industrial equilibrium of 280 ppm should now be 287 ppm, but that increase is still small compared to the anthropogenic signal of 93 ppm.

Indeed it was Law Dome, not the Taylor Dome... I had written that from memory, but as my memory is not anymore what it was 40 years ago... What I meant was a graph on the Internet, showing the Law Dome ice core CO2 variations, lagging the temperature variations with some 50 years (with ~ 10 ppmv / K, similar to the factor found over the Vostok ice core trends).

Indeed the ice cores show a remarkable (near) linear response of CO2 to temperature changes, be it overall ~ 8 ppmv / K for the 420,000 years Vostok ice core, where K more or less reflects the SH ocean temperature.

The lag between movements in temperature and movements in CO2 levels may even between 800 — 1000 years if Vostok ice core studies are correct.

The Vostok ice core for the Eemian shows a 100ppm rise in CO2 (starting at 190ppm) after temperature started to rise (not the other way around).

The Vostok core clearly indicates that when the temperature reaches 2 °C a mechanism kicks in which sets the temperature falling again and initiates an ice - age.

We understand from Vostok ice core data that there is a ~ 600 year lag in CO2 after temperature.

The graph built from the Vostok ice core data shows us the relationship between CO2 in the atmosphere and global temperature.

Carbon dioxide measurements on Dome C ice, focusing on the interval 390 to 650 kyr before present, bp (2,700 — 3,060 m) 4, confirmed the strong coupling between CO2 and Antarctic temperature found1 in the Vostok ice core for the past 420 kyr.

The dD record is directly related to the temperature of most of the SH oceans, where the pecipitation of the Vostok ice core originated.

Precision of Ice Core Measurements: Some of the best data we have of historic temperatures are the studies of isotopes of gases and various components of the atmosphere in ice cores, such as Vostok in Antarctica, and GRIP in GreenlaIce Core Measurements: Some of the best data we have of historic temperatures are the studies of isotopes of gases and various components of the atmosphere in ice cores, such as Vostok in Antarctica, and GRIP in Greenlaice cores, such as Vostok in Antarctica, and GRIP in Greenland.

The Vostok ice core record suggests CO2 levels have not been this high in the last 800,000 years, but if Salby is right, and temperature controls CO2, then CO2 levels ought to have been higher say, 130,000 years ago when the world was 2 — 4 degrees warmer than it is now.

Further, there is firm evidence that migration of CO2 isn't important in the Vostok and Dome C ice cores over the past 800,000 years: each glacial / interglacial period shows the same ratio between temperature and CO2 changes: about 8 ppmv/degr.C.

As far as the correlation between GHGs and temperature goes, recent history already passes his r2 > 0.5 test with flying colours - the Mauna Loa CO2 data vs GISTEMP from 1961 - 2004 gets r2 = 0.76, and I'm sure that the Vostok ice core data must be in the same ballpark over ~ 400,000 years or more (a quick google finds multiple references to the strong correlation but no hard numbers and I can't be bothered doing it myself).

Looking at the Vostok Ice core data I would think it is much more likely that the Earths temperature is more of a control valve for atmospheric Co2 content.

Heres a compiled temperature graph: http://cdiac.ornl.gov/trends/temp/vostok/graphics/tempplot5.gif Based on the Vostok Ice Core.

There is the research that reports that Vostok ice cores, going back 800,000 years, clearly shows that temperature rises before a parallel rise of CO2 800-1200 years later.

Records of CO2 (green) and temperature (blue) over the past 350,000 years from the Vostok ice core, after [Petit et al., 1999].

But let's do a real rough check, based on the HadCRUT surface temperature record, the Mauna Loa measurement of atmospheric CO2 (after 1958) and the IPCC estimated CO2 level based on the Vostok ice cores (prior to 1958):

Nancy, there are higher resolution proxies, such as the Vostok Ice Core, which do in fact show lots of temperature spikes.

HS12 reviews a number of other temperature estimates, including from the Vostok Antarctic ice core, and arrives at its LGM cooling estimate.

On the basis of atmospheric CO2 data obtained from the Antarctic Taylor Dome ice core and temperature data obtained from the Vostok ice core, Indermuhle et al. (2000) studied the relationship between these two parameters over the period 60,000 - 20,000 years BP (Before Present).

Then, in another study of the 420,000 - year Vostok ice - core record, Mudelsee (2001) concluded that variations in atmospheric CO2 concentration lagged variations in air temperature by 1,300 to 5,000 years. . .»

The Vostok ice core is everywhere when it comes to CO2 and temperature.

Figure 1 shows the Vostok ice core CO2 and temperature variations.

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.

Variations over 420,000 years of CO2, methane (CH4), and temperature, from the Vostok ice core after it reached bedrock (1999): four complete glacial cycles.

He felt the Vostok ice core records of CO2 and temperature as presented in the movie were «a pretty good match,» and asked Chevron's counsel to comment on that.

Anyway, if the problem was huge, then the oldest ice cores should show a lower CO2 / temperature ratio, which is not the case for either Vostok (420 kyr) or Dome C (800 kyr).

Ice cores have been extracted at a place named Vostok which reveal temperatures and CO2 levels from the past.

According to Ruddiman (not a direct link to the literature), it was actually the release of methane from rice paddies and other forms of agriculture starting about 5,000 years ago that prevented the same sort of fairly rapid decay in temperature seen in the Vostok ice core record of previous interglacials.

The Vostok ice core had stopped me in my tracks because it seemed to suggest definitive evidence of CO2 attribution (though we now know the effect comes before the cause), but it was the hockey stick graph that caused me to do a U-turn, because it implied so plainly that today's temperature was unprecendented in magnitude and rate of change.

al. present annual values, much of the Vostok ice cores yielded temperature data every 200 years.

It is true that the Vostok ice core has illustrated that there is a delay of between 200 and 800 years between a change in temperature and the lagging change in CO2.

In particular, you could start with my articles on how we know that the CO2 rise is anthropogenic and why the GHG / temperature record in the Vostok ice cores does not imply that CO2 doesn't drive temperature.

Figure 1: Antarctic (Vostok) ice core records of temperature, CO2 (upper) and CH4 (lower) including time - scale adjustment to account for ice - gas age difference associated with the time for air bubbles to be sealed (Petit et al. 1999) and corrected for variations of climate in the water vapor source regions (Vimeux et al. 2002) as described in Supporting Text of Hansen and Sato (2004).

Again, look more carefully into the Vostok ice core data http://www.realclimate.org/index.php?p=221 - contrary to your presentation of stable concentrations over thousands of years, there was no single period in time when concentrations and temperatures were steady stable, they were always changing, and therefore were in dynamics, in a state far from equillibrium.

For the Vostok ice core (8 ppmv / °C) this is in fact compared to the calculated SH ocean temperatures (via dD and D18O measurements).

New insights into Southern Hemisphere temperature changes from Vostok ice cores using deuterium excess correction.

The Vostok ice core proxy record shows that there has been substantial variability in temperature near the south pole throughout the Holocene.