Sentences with phrase «from paleoclimate data»

Temperature histories from paleoclimate data (green line) compared to the history based on modern instruments (blue line) suggest that global temperature is warmer now than it has been in the past 1,000 years, and possibly longer.

«It is unlikely that coastal cities or low - lying areas such as Bangladesh, European lowlands, and large portions of the United States eastern coast and northeast China plains could be protected against such large sea level rise,» states a report co-authored by Hansen, titled «Ice Melt, Sea Level Rise and Superstorms: Evidence from Paleoclimate Data, Climate Modeling, and Modern Observations that 2 °C Global Warming is Highly Dangerous».

We can obtain this «long - term» climate sensitivity from paleoclimate data by finding the scale factor that causes the GHG forcing to match the paleoclimate temperature change as accurately as possible.

Interactive comment on «Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2C global warming is highly dangerous» by J. Hansen et al..

From Paleoclimate data we know that the Eemian was approximately 1.5 C warmer and had sea levels were ~ 4.5 m higher.

That might have changed this week with the coverage of announcement of «Ice Melt, Sea Level Rise and Superstorms: Evidence from Paleoclimate Data, Climate Modeling, and Modern Observations that 2 °C Global Warming is Highly Dangerous» by James Hansen and 16 other eminent scientists.

Eli, and the bunnies, have been following the on line review of Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 °C global warming is highly dangerous by J. Hansen, M. Sato, P. Hearty, R. Ruedy, M. Kelley, V. Masson - Delmotte, G. Russell, G. Tselioudis, J. Cao, E. Rignot, I. Velicogna, E. Kandiano, K. von Schuckmann, P. Kharecha, A. N. Legrande, M. Bauer, and K. - W.

Based on these data, the 10 - year period, 1146 — 1155, was selected as a scenario of worst - case warm drought from the paleoclimate data for the past 12 centuries over the Southwest.

Third, our calculations are for a single fast - feedback equilibrium climate sensitivity, 3 °C for doubled CO2, which we infer from paleoclimate data.

A best estimate of climate sensitivity close to 3 °C for doubled CO2 has been inferred from paleoclimate data [51]--[52].

Verdon and Franks (2006)-- for instance — used «proxy climate records derived from paleoclimate data to investigate the long - term behaviour of the PDO and ENSO.

The information derives in part from paleoclimate data, the record of how climate changed in the past, as well as from measurements being made now by satellites and in the field.

Originally posted on Open Mind: A new paper by Hansen et al., Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 °C global warming is highly dangerous is currently under review...

The initial title of «Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 °C global warming is highly dangerous» had the final phrase changed to «could be dangerous.»

«Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 C global warming could be dangerous» J Hansen, M Sato, P Hearty, R Ruedy, M Kelley, V Masson - Delmotte,... Atmospheric Chemistry and Physics 16 (6), 3761 - 3812, 2016

What is true is that there is very very strong evidence from paleoclimate data (deep sea sediment cores) for changes in the distribution of chemical tracers that must reflect changes in the deep circulation in the Atlantic.

That is the case whether you are extrapolating from paleoclimate data or from any recent temperature dataset vs atmospheric CO2 concentration measurements (eg Keeling curve).

I feel obliged to add my 2 cents from the paleoclimate data perspective.

On July 23, I wrote about the rocky rollout, prior to peer review, of «Ice Melt, Sea Level Rise and Superstorms: Evidence from Paleoclimate Data, Climate Modeling, and Modern Observations that 2 °C Global Warming is Highly Dangerous.»

The full title is: «Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 o C global warming could be dangerous ``.

That is the case whether you are extrapolating from paleoclimate data or from any recent temperature dataset vs atmospheric CO2 concentration measurements (eg Keeling curve).

A best estimate of climate sensitivity close to 3 °C for doubled CO2 has been inferred from paleoclimate data [51]--[52].

«Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2o C global warming could be dangerous»

It's a long paper with a long title: «Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 oC global warming could be dangerous».

Not exact matches

They suggested this based on paleoclimate data from the Eemian period, when one degree of warming seems to have done just that.

The researchers make their case in part by describing paleoclimate data from the Eemian, an interglacial (warm) period that lasted from about 130,000 to 115,000 years ago.

The findings, published in the journal Nature Communications, show that integrating evidence from historical writings with paleoclimate data can advance both our understanding of how the climate system functions, and how climatic changes impacted past human societies.

In order to predict future changes in climate, scientists verify and refine their models against paleoclimate data from the ice cores Taylor and others pull up.

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.

I'm curious, if the mid-holocene event resulted from solar activity, rather than orbital effects, would the resolution of our paleoclimate data really be high enough to determine whether or not these changes were as rapid as the changes we're seeing today?

Oerlemans's reconstruction of global temperatures (largely from mid latitude glaciers) is entirely independent of the much talked about temperature records from other paleoclimate proxy data (e.g. Moberg and others, Mann and others, Crowley and others).

The paleoclimate knowledge and data from the LGM therefore put possible future climate change into perspective.

David's comments reminded me of something that Suki Manabe and I wrote more than 25 years ago in a paper that used CLIMAP data in a comparative evaluation of two versions of the 1980s - vintage GFDL model: «Until this disparity in the estimates of LGM paleoclimate is resolved, it is difficult to use data from the LGM to evaluate differences in low latitude sensitivity between climate models.»

This paper takes a novel approach to the problem of reconstructing past temperatures from paleoclimate proxy data.

Just a quick note to say that the paleoclimate data for earlier warm periods 125,000 years ago and even 8 - 10,000 years ago in northern Alaska (paleoclimate warmer than now, [from] different forcings) document the northward advance of the treeline from Nome to Barrow, Alaska, and the Canadian border at different times of change in Earth's orbital parameters (without a significant change in CO2).

This means that approaches that use the first order approximation to estimate climate sensitivity from the instrumental period (such as Lewis) will underestimate climate sensitivity and approaches that use the first order to estimate climate sensitivity using paleoclimate data (Hansen and others) will overestimate climate sensitivity.

Previous large natural oscillations are important to examine: however, 1) our data isn't as good with regards to external forcings or to historical temperatures, making attribution more difficult, 2) to the extent that we have solar and volcanic data, and paleoclimate temperature records, they are indeed fairly consistent with each other within their respective uncertainties, and 3) most mechanisms of internal variability would have different fingerprints: eg, shifting of warmth from the oceans to the atmosphere (but we see warming in both), or simultaneous warming of the troposphere and stratosphere, or shifts in global temperature associated with major ocean current shifts which for the most part haven't been seen.

Although not part of our study, high - resolution paleoclimate data from the past ~ 130 years have been compiled from various geological archives, and confirm the general features of warming trend over this time interval»

The study uses models, paleoclimate data and modern observations to analyze the impact of ice shed from Antarctic ice shelves and Greenland.

Quote from another paleoclimate grad student in conversation «the deniers never hate on us the way they do the tree ring people,»cause our data is solid».

Sure, it would take a lot of computing power to go from 100 - year to 10,000 year runs, constrained by what paleoclimate data we have.

R. Gates: «Had no idea we had Paleoclimate data from Mars covering the past several million years, which is the only way you could make this claim.»

This network consists of scientists from 9 regional working groups, each of which collects and processes the best paleoclimate (past climate change) data from their respective region.

ie earth and mars...» — Had no idea we had Paleoclimate data from Mars covering the past several million years, which is the only way you could make this claim.

We use numerical climate simulations, paleoclimate data, and modern observations to study the effect of growing ice melt from Antarctica and Greenland.

Computer models can be used predict different future climate patterns, and paleoclimate data provides a useful framework from which to base these models.

We consider several important climate impacts and use evidence from current observations to assess the effect of 0.8 °C warming and paleoclimate data for the effect of larger warming, especially the Eemian period, which had global mean temperature about +2 °C relative to pre-industrial time.

In a few cases they rely on subjective interpretation of questionable reconstructed paleoclimate data from selected periods of our geological past, rather than on empirical data based on actual, real - time physical observations or reproducible experimentation..

The snail shells sample more finely spaced increments of time than do data from bands found in caves, trees, or mollusks, which have been used in prior paleoclimate research, he added.

From a combination of climate models, satellite data, and paleoclimate records the scientists conclude that the West Antarctic ice sheet, Arctic ice cover, and regions providing fresh water sources and species habitat are under threat from continued global warmFrom a combination of climate models, satellite data, and paleoclimate records the scientists conclude that the West Antarctic ice sheet, Arctic ice cover, and regions providing fresh water sources and species habitat are under threat from continued global warmfrom continued global warming.