Sentences with phrase «in paleoclimate studies»

In the paleoclimate studies that I've specialized in, the Nature and Science articles are often little more than Reader's Digest articles.

We surmise, based on our implementation of the methodology, that the R - squared and Coefficient of Efficiency (as this is defined in paleoclimate studies) statistics fail to reach statistical significance for the AD1400 step.

However, the separation of char from soot has rarely been applied in paleoclimate studies using sediment analysis, much less in investigations of long - term records of paleo - fires.

Not exact matches

Eelco Rohling, an ocean and climate scientist at the University of Southampton in England, has studied the paleoclimate record going back 50 million years.

To conduct landmark paleoclimate studies from Lake El «gygytgyn in eastern Siberia, geologist Julie Brigham - Grette of the University of Massachusetts, Amherst, relied heavily on Russian collaborators she has partnered with for years.

«With present - day emission rates, it's expected that we'll reach 600 ppm before the end of this century,» says study coauthor Simone Galeotti, a paleoclimate scientist at the University of Urbino in Italy.

«Our study has found evidence to the contrary, suggesting that in fact, the future long - term trend based on paleoclimate reconstructions is likely towards diminishing precipitation, with no relief in the form of increased Mediterranean storms, the primary source of annual precipitation to the region, in the foreseeable future.»

Much more careful studies, in which the actual radiative forcing can be quantified, pretty much show that the paleoclimate record is compatible with the full IPCC range, with both the higher and lower ends appearing less probable.

One can temper that with studies of paleoclimate sensitivity, but the ensemble results still should be borne in mind, since doubling CO2 takes us into a climate that has no real precendent in the part of the climate record which has been used for exploring model sensitivity, and in many regards may not have any real precedent in the entire history of the planet (in terms of initial condition and rapidity of GHG increase).

The research drew lessons from paleoclimate studies of the Last Glacial Maximum, the cold peak of the last ice age, that relate to the extent of warmth possible in an era of accumulating greenhouse gases:

I suspect that there will be considerably more uncertainty attached to this activity than there was to the attribution of climate change to anthropogenic activity — in part because the only guides we really have are the models and paleoclimate studies, both of which are subject to significant uncertainties.

The paleoclimate evidence from this new study supports the attribution of the tropical temperature trend to the ever - increasing greenhouse gas burden in the atmosphere.

Paleoclimate studies of tropical ice cores tend to support the scenario of changes in the tropics propagating northwards, too, not the reverse.

As we have discussed several times elsewhere on this site, studies employing model simulations of the past millennium have been extremely successful in reproducing many of the details evident in paleoclimate reconstructions of this interval as a forced response of the climate to natural (primarly volcanic and solar) and in more recent centuries, anthropogenic, radiative changes.

If you refer to the fact that CO2 levels rise after temperature rises (from paleoclimate sediment core studies, etc.), this MOST CERTAINLY DOES NOT imply anything in the way of causality.

The study published in the journal Nature says that paleoclimate records in the past five centuries (500 years) indicate that the constant warming in the tropics and Northern Hemisphere began in the 1830s.

In fact the new study is merely reaffirming science and therefore shouldn't shock anyone who's paid good attention during paleoclimate class.

In this study, which was led by Oregan State University, funded by the US National Science Foundation's Paleoclimate Program and just published in Science, researchers used «extensive sea and land surface temperature reconstructions» of around 21,000 years ago — in stead of the (late) Holocene temperature record that is mostly useIn this study, which was led by Oregan State University, funded by the US National Science Foundation's Paleoclimate Program and just published in Science, researchers used «extensive sea and land surface temperature reconstructions» of around 21,000 years ago — in stead of the (late) Holocene temperature record that is mostly usein Science, researchers used «extensive sea and land surface temperature reconstructions» of around 21,000 years ago — in stead of the (late) Holocene temperature record that is mostly usein stead of the (late) Holocene temperature record that is mostly used.

; North Pole Cam 1 & 2; Arctic Sea Ice Extent Averaging Below 2007 Anomaly; Paleoclimate Implications for Human - Made Climate Change; UN Security Council Addresses Considers Global Security and Climate Change; New study details glacier ice loss following ice shelf collapse; Climate Change To Spawn More Wildfires; Gingrich Says 2006 Climate Change Ad He Starred In Was «Misconstrued»

Figure 4 Figure 5 Figure 7 (Source CDIAC) A never before western published paleoclimate study from China suggests warmer temperatures in the past.

The paleoclimatology community seems to be tightly coupled as indicated by our social network analysis, has rallied around the [Mann] position, and has issued an extensive series of alternative assessments most of which appear to support the conclusions of MBH98 / 99... Our findings from this analysis suggest that authors in the area of paleoclimate studies are closely connected and thus «independent studies» may not be as independent as they might appear on the surface.

Howard J. Falcon - Lang (2005) «Global climate analysis of growth rings in woods, and its implications for deep - time paleoclimate studies» Paleobiology: Vol.

Chapter 6 highlights the fact that there are now a large number of different paleoclimate studies which all lead to the same key conclusion that northern hemisphere mean temperatures in recent decades are likely unprecedented in at least a millennial timeframe.

It also sends a disturbing message that AR4 is somehow backing away from paleoclimate - based claims made in the TAR where the results from paleoclimate studies were highlighted.

In around fifteen years it will be just one early, and slightly flawed, paleoclimate reconstruction that has subsequently been 90 % validated by later and better studies.

In summary, paleoclimate studies provide one line of evidence that supports an equilibrium climate sensitivity between about 2 and 4.5 °C, and the GWPF justification for dismissing these estimates is weak.

To better understand these discrepancies, a recent study published in Geophysical Research Letters investigates the drivers of changes in deep ocean circulation across a range of modern and Last Glacial Maximum (LGM, ~ 21000 years ago) climate simulations from the latest Paleoclimate Modelling Intercomparison Project (PMIP).

steven mosher Says: August 30th, 2011 at 2:20 pm Marlowe Johnson Says: August 30th, 2011 at 1:30 pm «paleoclimate studies offer very little useful information in relation to the determination of climate sensitivity.»

> For example, one of the clear resuls from the IPCC effort is that paleoclimate studies offer very little useful information in relation to the determination of climate sensitivity.

Actually, climate science derives a great deal of understanding of the present climate through its studies of the past, in particular the paleoclimate.

We had no «globally and annually averaged land and sea surface temperature» indicator back in medieval times, so we have to rely on the information we can get from historical records and paleoclimate studies.

It was mainly because guys like this — ok, shall be nameless, you read it yourself [points to slide with images of David Halpern, NASA and Mark Eakin NOAA]-- Who at that time was actually working for NOAA and NASA and was funding some of those guys like Michael Mann and all that on paleoclimate study was saying, look man, we need some kind of cogent reply, some kind of serious critical discussion so they could pass on to somebody in OSTP.

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).

Authors of a recent study published in Science Advances used paleoclimate data to examine how rainfall patterns have responded to past climate shifts.

Finally, we comment on several policy issues arising from this controversy: the lack of consistent requirements for disclosure of data and methods in paleoclimate journals, and the need to recognize the limitations of journal peer review as a quality control standard when scientific studies are used for public policy.

Reliance can not be placed on paleoclimate proxy - based estimates of ECS — the AR4 WG1 report concluded (Box 10.2) that uncertainties in Last Glacial Maximum studies are just too great, and the only probability density function (PDF) for ECS it gave from a last millennium proxy - based study contained little information.

Though not to be trusted in the matter of paleoclimate «hockey sticks,» he was apparently an indispensible (though unacknowledged) source on the basics of dendrochronology (tree ring studies.)

But a recent study published in Nature uses paleoclimate records from the 1500s to show that industrial - era warming first became apparent in the Northern Hemisphere in the mid-1800s.