Sentences with phrase «ancient climates»

In a video, noted scientists debate the connections between ancient climate changes and the emergence of modern human traits.

Their work, which links ancient climate and archaeological data, could help modern communities identify new crops and other adaptive strategies when threatened by drought, extreme weather and other environmental challenges.

To the surprise of many, studies of ancient climates showed that astronomical cycles had partly set the timing of the ice ages.

Answer: While there are poorly understood ancient climates and controversial climate changes in earth's long geological history, there are no clear contradictions to greenhouse theory to be found.

But it is also a world for which ancient climates offer insight — and those insights are not cheery.

Already, it is solving ancient climate puzzles and delivering some unsettling news about the future.

If you're studying ancient climate trends then you should be aware of the many intricacies of our planets ecosystem, making this question narrow in scope.

Other important aspects which contributed to ancient climate regimes are the ocean currents, which are modified by continent position as well as other factors.

Study of ancient climates reveals climate sensitivity in same range as predicted independently by computer models.

To the surprise of many, studies of ancient climates showed that astronomical cycles had partly set the timing of the ice ages.

The way caves «breathe» is the true controller, a finding which pours doubt on ancient climate records derived from these structures.

«Warming pulses in ancient climate record link volcanoes, asteroid impact and dinosaur - killing mass extinction.»

Kim Cobb, a climate scientist specializing in ancient climate change, agrees that the Hansen study is useful mostly because it explores the worst - case scenario.

Being able to reconstruct ancient climate change is a critical part of understanding why the climate behaves the way it does.

«Both for modern society and certainly ancient civilisations, it means that if one region was suffering the consequences of drought, those conditions are likely to exist throughout the Mediterranean basin,» said Kevin Anchukaitis, an expert in ancient climates at the University of Arizona, and one of the authors.

Researchers often reconstruct ancient climate from clues in sediment cores.

To improve our ability to predict the potential impacts of future climate change it is essential that the search for proxy data in new locations with a more comprehensive geographical spread are sought out in order to get a more global picture of ancient climate with better resolution.

For this reason, the PETM, which has been identified in hundreds of sediment core samples worldwide, is probably the best ancient climate analogue for present - day Earth,» the release noted.

And earlier research into ancient climates has confirmed that greenhouse - driven warming could all but erase the ice, and change the world dramatically.

But experts say the pattern of Eocene rainfall and rivers, while perhaps important for ancient climate changes, may not help understand future climate changes.

«Ice cave in Transylvania yields window into region's past: Scientists conduct ancient climate research on oldest cave glacier in the world.»

Scientific analysis of past climates shows that greenhouse gasses, principally CO2, have controlled most ancient climate changes.

Rock layers in the area reveal ancient climates as varied as rivers and swamps (Chinle Formation), Sahara - like deserts (Navajo Sandstone), and shallow ocean (Mancos Shale).

GRAND OPENING A computer simulation of ancient climates predicts that people most likely left Africa about 80,000 to 100,000 years ago.

Kenya's Lake Magadi, now alkaline and mostly dry, once teemed with freshwater fish; a core drilled here will reveal ancient climate swings.

As yet, no one has touched the waters of a subglacial lake with so much as a drill bit, but a Russian group that has been coring ice over Lake Vostok to get ancient climate records is coming close.

Venus may have had a shallow liquid - water ocean and habitable surface temperatures for up to 2 billion years of its early history, according to computer modeling of the planet's ancient climate by scientists at NASA's Goddard Institute for Space Studies (GISS) in New York.

If we can analyze ancient climates, atmospheric compositions and the interplay among the crust, atmosphere, life and climate in the geologic past, we can take some first steps at understanding what is happening today and likely to happen tomorrow.»

Researchers reconstructing ancient climates delve into the mineral for a record of temperature and atmospheric composition, environmental conditions and the state of the ocean at the time those minerals formed.

e) overconfidence in knowledge of ancient climate details f) all of the above

«You can build your climate model to simulate ancient climates.

A given year's snowfall is compacted into ice during the ensuing years, trapping air bubbles, and so paleoclimate researchers have been able to glimpse ancient climates in some detail.

Up through the early 1970s, few of the scientists who studied ancient climates paid much attention to putative short - term changes.

This portion of the book offers a great deal of information on «paleoclimatology» (the study of ancient climate states.)

Chapter 5 of «AR5» describes work examining ancient climates on Earth, and the lessons that they hold for us today — and particularly work carried out since the last Assessment Report in 2007.

These days when one goes to hear a talk on ancient climates of North America, one is likely to learn that the speaker was forced into early retirement from the U.S. Geological Survey by budget cuts.

Meanwhile striking news came from studies of ancient climates recorded in Antarctic ice cores.

Thomas Hearing said: «We hope that this approach can be used by other researchers to build up a clearer picture of ancient climates where conventional climate proxy data are not available.»

Greenhouse gasses, principally CO2, have controlled most ancient climate changes.