Sentences with phrase «global ice core data»

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

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.

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.

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.

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.

[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.

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.»

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.

«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.»

[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.

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

For instance, here's the data for delta - oxygen - 18 from a stack of 57 ocean sediment cores, which is considered an excellent proxy for global ice volume, known as the «LR04 stack» (from Lisiecki, L.E., & Raymo, M.E. 2005.

When sceptics look at statistical data, whether it is recent ice melt, deep sea temperatures, current trend in global surface temperatures, troposphere temperatures, ice core records etc. they look at the data as it is without any pre-conceptions and describe what it says.

Also, the Greenland ice core data do agree pretty good with sulfate emissions estimates, but Greenland is located downwind of the US and Canada and does not represent global trends impacted by developing countries.

1850 - 1957 is based on Law Dome Ice Core Data Adjusted for Global Mean: «D.M. Etheridge, L.P. Steele, R.L. Langenfelds, R.J. Francey, J. - M.

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

In 1999, the year after the high temperatures of the 1998 El Nino, I became convinced that geologic data of recurring climatic cycles (ice core isotopes, glacial advances and retreats, and sun spot minima) showed conclusively that we were headed for several decades of global cooling and presented a paper to that effect (Fig. 5).

«Unfortunately, we have no direct information concerning the past global surface albedo from the ice core data.

If you were conversant on the subject, you would know that the ice core data support the role of CO2 in global warming.

It was the ice - core data that changed my mind about global warming.

Scientists were far more aware than the general public of how the scientific findings of the past decade, the supercomputer calculations and ice core measurements and data on rising global temperatures, had raised the plausibility of greenhouse warming forecasts.

Atmospheric CO2, CH4 and N2O have varied almost synchronously with global temperature during the past 800000 years for which precise data are available from ice cores, the GHGs providing an amplifying feedback that magnifies the climate change instigated by orbit perturbations [29 — 31].

What all of this «data» leaves out is the tree - ring minima and ice core acidity peaks that, when integrated with other regional and global climatological events stretching back, at the very least, to 4375 BCE, present a picture of some kind of cyclical, apparently cosmically induced climate cycle.

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).

In this link https://bravenewclimate.com/2016/09/10/open-thread-26/#comment-470348 I briefly outline the results of an important paper which uses Liang causality, a statistical notion superior to the older Granger causality, to analyze the climate data, both ice core and recent, to obtain the expected result that CO2 Liang causes global warming in recent times but the opposite conclusion for the paleodata.

A combination of historical ice core data and air monitoring instruments reveals a consistent trend: global atmospheric methane concentrations have risen sharply in the past 2000 years.

However, the correlation of CO2 and global temperature is well established over the last 650,000 years using ice core data.

Greenland ice cores indicate that the start of the instrumented data (thermometers) coincides with a cold period in the northern hemisphere and that at the site of a well - studied ice core (Global Cooling - Doomsday Called Off), the temperature in the mid 1800s was the coldest in 8,000 years.

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..

He used data from the Camp Century ice core in Greenland, arguing that these «may give a picture of the natural fluctuations in global temperature over the last 1000 years».

The message from the historical data — records, tree rings, ice cores, lake sediments and so on — is that global warming is linked to fossil fuel - burning and to rising levels of greenhouse gases in the atmosphere.