Sentences with phrase «other paleoclimate»

For the further comparison with other paleoclimate data, therefore, the MXD reconstruction is used; although the reader should take note that the relatively low sample replication in the MXD data generally gives a wider error band (Fig. 5).

These frequency changes are consistent with other paleoclimate indicators from the tropical North Atlantic, in particular, sea surface temperature variations.

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).

Although some earlier work along similar lines had been done by other paleoclimate researchers (Ed Cook, Phil Jones, Keith Briffa, Ray Bradley, Malcolm Hughes, and Henry Diaz being just a few examples), before Mike, no one had seriously attempted to use all the available paleoclimate data together, to try to reconstruct the global patterns of climate back in time before the start of direct instrumental observations of climate, or to estimate the underlying statistical uncertainties in reconstructing past temperature changes.

These and other paleoclimate records indicate that rain belts shifted northward along with the thermal equator because of the global heat imbalance.

Not exact matches

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.

«Applying the same technique to other subglacial volcanos will provide new constraints on paleoclimate models that consider the extents and timing of planetary glaciations.»

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.

Other features of the record are also redated, such as the East African megadroughts (24), which must have terminated at least 10 ka earlier than the previous estimate of 75 ka B.P. Clearly, existing comparisons of the Lake Malawi paleoclimate data to other regional and global records (24, 25, 32) will need to be revised in the light of these findOther features of the record are also redated, such as the East African megadroughts (24), which must have terminated at least 10 ka earlier than the previous estimate of 75 ka B.P. Clearly, existing comparisons of the Lake Malawi paleoclimate data to other regional and global records (24, 25, 32) will need to be revised in the light of these findother regional and global records (24, 25, 32) will need to be revised in the light of these findings.

Other prior work suggesting a link between terrestrial paleoclimate and solar luminosity variations has not provided any specific mechanism.

Most of the previous medalists are a good deal more senior than Mike Mann, and include paleoceanographer Laurent Labeyrie, limnologist Francoise Gasse, ice core pioneers Dominique Raynaud and Sigfus Johnsen and number of other major names in the climate and paleoclimate research, including RC's own Ray Bradley.

There are plenty of other examples, and of course, there is a lot of intrinsic interest in paleoclimate that is not related to climate models at all!

NSF — Paleoclimate doesn't require it, although some other NSF departments do.

One other point on cloud feedbacks from a paleoclimate perspective — if a strong negative cloud feedback begins at modern earth temperatures, it would be unlikely for past temperatures to have exceeded modern ones.

Summary for Policymakers Chapter 1: Introduction Chapter 2: Observations: Atmosphere and Surface Chapter 3: Observations: Ocean Chapter 4: Observations: Cryosphere Chapter 5: Information from Paleoclimate Archives Chapter 6: Carbon and Other Biogeochemical Cycles Chapter 7: Clouds and Aerosols Chapter 8: Anthropogenic and Natural Radiative Forcing Chapter 8 Supplement Chapter 9: Evaluation of Climate Models Chapter 10: Detection and Attribution of Climate Change: from Global to Regional Chapter 11: Near - term Climate Change: Projections and Predictability Chapter 12: Long - term Climate Change: Projections, Commitments and Irreversibility Chapter 13: Sea Level Change Chapter 14: Climate Phenomena and their Relevance for Future Regional Climate Change Chapter 14 Supplement Technical Summary

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.

* ** McIntyre, Stephen and Ross R. McKitrick (2009) Proxy inconsistency and other problems in millennial paleoclimate reconstructions Proceedings of the National Academy of Sciences February 2, 2009.

Ongoing field and laboratory programs in palynology, paleoclimate reconstruction, and other geophysical sciences provide fundamental climate data for evaluating model predictions.

Especially since the science — paleoclimate data, heating in the stratosphere relative to the troposphere, and other fingerprints of manmade climate change — is so compelling.

Program areas at GISS may be roughly divided into the categories of climate forcings; climate model development; Earth observations; atmospheric radiation; atmospheric chemistry; climate impacts; planetary atmospheres, exoplanets, and astrobiology; paleoclimate; and other disciplines.

The other important happening was the fall meeting of the American Geophysical Union, which would be attended by many of the big names in paleoclimate and at which both McIntyre and Amman would be making presentations.

Just as you claim not to be an expert in paleoclimate reconstructions, many other climate scientists are not either.

But only the ice core methods have the resolution to say if there were other still - briefer events — and so the paleoclimate researchers are now looking at sites in North Greenland and Antarctica that might be capable of yielding undisturbed cores.

At present, the Pacific shifts erratically and frequently between warm and cold phases, but paleoclimate data indicates that, even during the Holocene, there were extended periods when it was stuck in one phase or the other.

In the case of the earth, there is also an immense amount of evidence (from theory, from paleoclimate, even from observations of other planets) to bring to bear.

Yes, but we have no reliable methods for inferring very high climate sensitivity, other than climate models that are demonstrably running to hot and dubious analyses of the paleoclimate record.

The trouble is, the paleoclimate authors left so many «easter egg features» for Steve McIntyre & other scientists to discover that it was always going to take a while.

Instead, the report argues that this approach provides the only reliable method for estimating climate sensitivity, and that all other methods that produce higher estimates (e.g. paleoclimate and GCMs) are wrong.

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

This is supported by multiple lines of evidence, including GCMs, paleoclimate evidence (including climate response to forcing during glacial periods as well as millennial proxies), the instrumental record, and the climate response to volcanic forcings among others.

Lots of other longer cycles are seen in paleoclimate data like D. - O.

Other projects include paleoclimate and paleocirculation studies.

Examinations of paleoclimate temperatures and other variables recorded in both North Atlantic ocean sediments and Greenland ice cores (e.g., Lehman and Keigwin, 1992; Alley et al., 1993; Taylor et al., 1993) have led to suggestions that the AMOC

The rollercoaster mirrors the shape of a graph of paleoclimate data reconstructed by Shaun Marcott and several other scientists in a paper they published back in 2013.

Composed of 450 instrumental records from temperature stations sheltered from ocean - air / urbanization / adjustment biases throughout the world, a new 20th / 21st century global temperature record introduced previously here very closely aligns with paleoclimate evidence from tree rings, ice cores, fossil pollen and other temperature proxies.

Jim D, if you and others like you aren't willing to do what must be done to greatly increase the price of carbon, then all your talk of ice sheet melting, sea level rise, climate tipping points, global temperature trends, the earth's paleoclimate history, and climate model projections — all of that talk is mere Kabuke theater.

One of the longstanding CA criticisms of paleoclimate articles is that scientists with little - to - negligible statistical expertise too frequently use ad hoc and homemade methods in important applied articles, rather than proving their methodology in applied statistical literature using examples other than the one that they're trying to prove.

(2) Other approaches to reconstructing paleoclimate from Finnish lake sediments appear to be bearing fruit.

JimD, «If you see and recognize these strong positive feedbacks to solar changes, wouldn't it make sense, just from the precautionary point of view, to assume the same is quite possible for other forcings, especially when backed up by paleoclimate (my 700 ppm comment above)?

If you see and recognize these strong positive feedbacks to solar changes, wouldn't it make sense, just from the precautionary point of view, to assume the same is quite possible for other forcings, especially when backed up by paleoclimate (my 700 ppm comment above)?

-- paleoclimate data reflecting past climate states very different from today — climate response to volcanic eruptions, solar changes and other non-greenhouse gas forcings — timescales different from those relevant for climate stabilization, such as the climate response to volcanic eruptions

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.

I know far less about other regions, but to the extent that I am correctly understanding the paleoclimate, I'll say that the predictions for the American mid-west and also for central East Africa appear to agree with the past.

When we speak of hotter periods in the paleoclimate record or more absorption of radiation and other historical - pre-historical climate conditions, keep in mind that 6.6 billion people were not here and that the conditions needed to sustain such a global population (with advent of agriculture, and urbanization) both in way of climate and economics has changed dramatically.

However, the full study does indicate that multi-meter sea level rise before 2100 is likely, based on ice loss doubling times, paleoclimate records and observed ocean current changes, among other factors.

A similar negative trend is seen in most other Holocene paleoclimate records from northern Sweden, e.g. changes in tree - limit (Karlén 1976; Kullman 1995); pollen (Barnekow 1999); chironomids (Larocque and Bigler 2004); oxygen - isotopes in lacustrine biogenic silica (Shemesh et al. 2001) and in lacustrine carbonates (Hammarlund et al. 2002).

Comprised of 450 instrumental records from temperature stations sheltered from ocean - air / urbanization / adjustment biases throughout the world, a new 20th / 21st century global temperature record introduced previously here very closely aligns with paleoclimate evidence from tree rings, ice cores, fossil pollen and other temperature proxies.