Sentences with word «palaeoclimate»

While present in palaeoclimate records, the drivers behind 20 - year climate variability are poorly understood.

Here we present a stricter approach, to improve intercomparison of palaeoclimate sensitivity estimates in a manner compatible with equilibrium projections for futureclimate change.

the figures in the above were based on: «Deriving global climate sensitivity from palaeoclimate reconstructions» Hoffert and Covey, Nature Vol 360, 10th December 1992.

The goal of PAGES» LandCover6k Working Group is to use pollen, archaeological and historical data to provide information on past land cover and land use change that can be used to evaluate and improve Anthropogenic Land - Cover Change (ALCC) scenarios for palaeoclimate modelling and the study of land - use as a climate forcing.

He is interested in palaeoclimate proxies, biotic evolution and stratigraphy, with particular emphasis on the fossil record of planktonic foraminifera from deep sea cores.

Many palaeoclimate studies have quantified pre-anthropogenic climate change to calculate climate sensitivity (equilibrium temperature change in response to radiative forcing change), but a lack of consistent methodologies produces awide range of estimates and hinders comparability of results.

Her research interests include identifying and understanding variations and trends in Australian climate extremes; investigating the role of multi-decadal scale climate variability in the Australian region; and characterising pre-instrumental climate variations in Australia and Antarctica using palaeoclimate data.

A 2007 Royal Society paper by NASA scientist Drew Shindell: ``... the rarity of palaeoclimate evidence for hydrate - induced climate changes argues that this is a fairly unlikely candidate for near - term sudden climate change.

The coexistence approach — A method for quantitative reconstructions of Tertiary terrestrial palaeoclimate data using plant fossils

My work also concerns past, present, and future stability of the West Antarctic Ice Sheet, as well as palaeoclimate - archaeologic links in the high Andes.

In using AOGCM output in this way, it is important not only to demonstrate that these unforced simulations do not drift significantly (Osborn, 1996), but also to evaluate the extent to which model estimates of low - frequency variability are comparable to those estimated from measured climates (Osborn et al., 2000) or reconstructed palaeoclimates (Jones et al., 1998).

One reason for this discrepancy is that climate models include only «fast» feedbacks, whereas palaeoclimate studies also include longer - term feedbacks such as changes to ice - sheet coverage.

These changes coincide with the different palaeoclimate zones proposed in the models, so the faunal distribution was probably climate - related,» comments Josep Fortuny, an ICP researcher who took part in the study.

Dynamics and palaeoclimate Reviews of the top 10 best rich men dating sites and apps exclusively for the rich and beautiful.

I'm chagrined to report that I sailed across the site of the 1452 eruption in 1975, but did not recognize the Kuwae caldera's island remnants as such, as I was searching the New Hebrides (now Vanuatu) for archaeological lithic sources, not palaeoclimate clues.

Nevertheless the result appears to provide a more realistic global picture than Royer / Veizer, consistent with the standard view of Cretaceous palaeoclimate ³.

Since the SAR there have been several attempts to combine various types of high - resolution proxy climate indicators to create large - scale palaeoclimate reconstructions that build on earlier work by e.g., Bradley and Jones (1993); Hughes and Diaz (1994) and Mann et al. (1995).

I also learned more about palaeoclimate and this reinforced my skepticism about catastrophe.

Co-author Gerrit Lohmann, who leads the Wegener Institute's palaeoclimate dynamics group, said: «Using the simulations performed with our climate model, we were able to demonstrate that the climate system can respond to small changes with abrupt climate swings.

Stolen e-mails have revealed no scientific conspiracy.To the denialists, the scientists» scathing remarks about certain controversial palaeoclimate reconstructions qualify as the proverbial «smoking gun»: proof that mainstream climate researchers have systematically conspired to suppress evidence contradicting their doctrine that humans are warming the globe.

The results have implications for how we interpret the impact of global warming on the hydrological cycle and its extremes, and may help to explain why palaeoclimate drought reconstructions based on tree - ring data diverge from the PDSI - based drought record in recent years9, 10.

Sohl, L.E., and M.A. Chandler, 2007: Reconstructing Neoproterozoic palaeoclimates using a combined data / modelling approach.

Specific interests include palaeoclimate of the tropical Andes, causes of late - glacial abrupt climate events, and the future evolution of tropical glaciers and hydrology.

Tessa Vance develops high resolution palaeoclimate records with a view to understanding long - term climate change.

Hansen and his colleagues summarise the challenge as follows: «If humanity wishes to preserve a planet similar to that on which civilisation developed and to which life on earth is adapted, palaeoclimate evidence and ongoing climate change suggest that CO2 will need to be reduced from its current 385ppm [parts per million] to at most 350ppm.»

To summarise, despite large uncertainties, LGM simulations capture the broad features found in palaeoclimate data, and better agreement is obtained with new coupled simulations using more recent models and more complete feedbacks from ocean, sea ice and land surface characteristics such as vegetation and soil moisture (Chapter 6).