Sentences with phrase «many paleoclimate studies»

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.

Marchal, O., T.F. Stocker, and F. Joos, 1998: A latitude - depth, circulation - biogeochemical ocean model for paleoclimate studies.

Stocker, T.F., D.G. Wright, and L.A. Mysak, 1992: A zonally averaged, coupled atmosphere - ocean model for paleoclimate studies.

There are tons of studies — ranging from paleoclimate studies to studies of volcanic effects, etc. that constrain climate response and which generally yield results consistent with the models.

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:

It is conventional honest serious scientists that are already doing what JC wants, and it is the nature of paleoclimate studies the proxy reconstructions will never have the level of credibility of a direct measurement.

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.

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

The example of millennial paleoclimate studies emphasises the paucity of this argument, as the expert list is very small.

The estimate for the CO2 sensitivity comes (mostly) from paleoclimate studies, observed climate responses to volcanoes, and climate models.

Paleoclimate studies (e.g., Peterson et al. 2000, Haug et al. 2001) and a series of modeling studies starting with Vellinga and Wood (2002), Chiang and Bitz (2005) and Broccoli et al. (2006) have revealed one important driver of ITCZ shifts: differential heating or cooling of the hemispheres shifts the ITCZ toward the differentially warming hemisphere.

Answer: The first order of business here is to correct the mischaracterization of this single paleoclimate study as the «foundation» of global warming theory.

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

And yes, Texas Sharpshooting is a problem with Team paleoclimate studies.

Paleoclimate studies may be of a high quality.

And as far as your constant disparagement of all paleoclimate studies goes, it is worthless.

WHT The Charney report also considered paleoclimate studies which demonstrated at least a 3C climate sensitivity NOT TRUE The phrase associated was «might be» It» might be» much smaller.

The Charney report also considered paleoclimate studies which demonstrated at least a 3C climate sensitivity — higher likely due to the long time scales involved.

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.

...... physics indicates that extra energy is being retained by the rising CO2 is common to many paleoclimate studies.......

Martin, when you have seen enough of these paleoclimate studies having been shown to have major flaws you don't believe any of them until they have been properly audited by someone like Steve McIntyre.

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.

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.

Our analysis is based on about equal parts of information gleaned from paleoclimate studies, climate modeling, and modern observations of ongoing climate changes.

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 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.

It's just one study of one location JimD and it contradicts virtually every other Holocene paleoclimate study.

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.»

A coupled dynamical ocean - energy balance atmosphere model for paleoclimate studies.

> 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.

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.

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.

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.

Paleoclimate studies don't challenge that.

The results have implications for both paleoclimate studies and model development.

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

Not exact matches

Previous paleoclimate modeling studies suggest the volcanic spurts could have wiped out the ozone layer worldwide, though temporarily.

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

However, studies evaluating model performance on key observed processes and paleoclimate evidence suggest that the higher end of sensitivity is more likely, partially conflicting with the studies based on the recent transient observed warming.

However, the quantitative response to freshwater inputs varies widely among models (Stouffer et al., 2006), which led the CMIP and Paleoclimate Modelling Intercomparison Project (PMIP) panels to design and support a set of coordinated experiments to study this issue (http://www.gfdl.noaa.gov/~kd/CMIP.html and http://www.pmip2.cnrs-gif.fr/pmip2/design/experiments/waterhosing.shtml).

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.

However, values this low are inconsistent with numerous studies using a wide variety of methods, including (i) paleoclimate data, (ii) recent empirical data, and (iii) generally accepted climate models.

Climate model studies and empirical analyses of paleoclimate data can provide estimates of the amplification of climate sensitivity caused by slow feedbacks, excluding the singular mechanisms that caused the hyperthermal events.

A number of major studies looking at paleoclimate data come to the same conclusion.

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).

- I don't study tree rings at all, so this will be quite naive, but I took a class on paleoclimate (actually with one of your old office - mates, Mathias Vuille) discussing the standarization procedure and why this tends to remove some of the low - frequency variation, though we never got into quantitative detail.

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.