Sentences with phrase «last glacial period»

Last glacial period began about 120,000 years ago and end about 15,000 years ago.

«This record, which spans the entire last glacial period, adds significantly to the understanding of how various climate forcings are felt by the western tropical Pacific,» Carolin added.

The last glacial period spanned from 110,000 to 10,000 years ago; during that time the Earth was colder and glaciers covered significantly more land.

The Neandertals disappeared at the high point of the last glacial period around 40 thousand years ago, at approximately the same time that modern humans migrated into Europe.

She analyzed samples that had broken off the formations to see what periods of time during a period called the last glacial period had high rainfall, and which had low rainfall.

Climate scientists find the last glacial period interesting because ice cores in Greenland and ocean sediment cores have shown that during this period there were sharp shifts in global temperatures.

These may be submerged ancient shorelines cut during times of lower sea level, «the most recent of which occurred during the last glacial period, which ended about 19,000 years ago,» Chaytor said.

Previous ocean sediment records suggest that, as the world slipped into the last glacial period, less carbon overall reached the sediments of the Southern Ocean, coinciding with declining atmospheric carbon dioxide.

Climate researchers from the Helmholtz Young Investigators Group ECUS at the Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (AWI) in Potsdam have now investigated how temperature variability changed as the Earth warmed from the last glacial period to the current interglacial period.

From the height of the last glacial period 21,000 years ago to our current interglacial period, the Earth has warmed by an average of five degrees Celsius.

Understanding the complex interplay between climate and biotic interactions is thus essential for fully anticipating how ecosystems will respond to the fast rates of current warming, which are unprecedented since the end of the last glacial period.

However, the new findings show that in the last glacial period in the seasonal sea - ice zone, which was twice as large as it is today, the water was well mixed to a depth of a few hundred metres.

This meant that vast quantities of nutrients were available to phytoalgae, which in turn contributed to storing the greenhouse gas CO2 during the last glacial period.

Up until now, researchers assumed that during the last glacial period there was a layer of freshwater — created by melting icebergs — that sat on the ocean like a lid all year round.

Using core samples from the ocean's floor in the Cariaco Basin, a body of water in the Caribbean Sea off the coast of Venezuela, she measured the change in the ratio of two isotopes of nitrogen from about 35,000 to 55,000 years ago, right in the middle of the last glacial period.

«We can demonstrate that during the last glacial period, the water column in the area of the seasonal sea - ice zone was more mixed in autumn and winter than previously thought,» says Dr Andrea Abelmann, from the Alfred Wegener Institute.

That biome dominated the northern reaches of Eurasia and North America for 2 million years, until the end of the last glacial period some 13,000 years ago.

However, some species of animals survived the end of the last glacial period somewhat longer than others.

They compared the carbon - 13 and nitrogen - 15 values in the giant deer bones from the Swabian Alb caves with those of red deer, other giant deer and reindeer, which were living at the beginning and the end of the last glacial period.

«Neanderthals were almost certainly making fire during the last glacial period,» says Sorensen, referring to a time about 100,000 to 35,000 years ago.

This was the case during the last glacial period around 100,000 to 20,000 years ago.

* Circulation changes in the Faeroe - Shetland Channel correlating with cold events during the last glacial period (58 - 10 ka).

It seems that after the climate cooled during the last glacial period, disappearing habitat inland forced brown bears toward the coasts, where they encountered polar bears shifted there by British - Irish ice sheets.

«Contrary to what it was thought, the colonization process of the Mediterranean — highlights Cardona — took place before the last glacial period.

The first one (around 50,000 — 200,000 years ago) colonised the Eastern Mediterranean, and in the second, much more recent (after the last glacial period), the species colonised Southern Italy, particularly Calabria.

However, latest scientific studies show that this marine species colonized the Mediterranean between 20,000 and 200,000 years ago, so the colonization event took place before the last glacial period.

To date, it was thought that the loggerhead turtle arrived to the Mediterranean from North America and the Caribbean after the last glacial period.

Woolly mammoths disappeared from Siberia and North America about 10,000 years ago, along with other giant mammals that went extinct at the end of the last glacial period.

The site has provided many Pleistocene faunal remains that give information about how the environment was before the last glacial period.

At present, the extent of Arctic sea ice is far less than during the last glacial period.

They compared them with mammals that lived at seven Eurasian sites during the last glacial period 35,000 to 12,000 years ago.

As recently as the last glacial period, local climates and whole biomes shifted substantially — and in short order, forcing many species to move, adapt or die out.

The beginning of the last glacial period was characterized in the Northern hemisphere by significant accumulation of snow at high latitudes and the formation of a huge polar ice sheet.

The last glacial period, which ended 12,000 years ago, began between 80,000 and 70,000 years ago.

The MIS 5a palaeosol is overlain by massive sands, representing a major change in the depositional regime, which we interpret as evidence for climatic desiccation at the start of the last glacial period (MIS 4), which would be consistent with other dated records for the region [13], [16], [18], [30].

«the last glacial period is a good example of a large forcing (~ 7 W / m ^ 2 from ice sheets, greenhouse gases, dust and vegetation) giving a large temperature response (~ 5 ºC) and implying a sensitivity of about 3ºC (with substantial error bars).»

Coming out of the last glacial period, there was a sudden climate reversal observed throughout the tropical and subtropical regions of the Earth.

As we have discussed previously, the last glacial period is a good example of a large forcing (~ 7 W / m2 from ice sheets, greenhouse gases, dust and vegetation) giving a large temperature response (~ 5 ºC) and implying a sensitivity of about 3ºC (with substantial error bars).

For myself, I draw the line at carbon isotope studies and anything older than the last glacial period in paleoclimate (with a couple of exceptions).

«Conversely, there is more and better evidence across Iceland that when the ice sheet underwent major reduction at the end of the last glacial period, there was a large increase in both the frequency and volume of basalt erupted — with some estimates being 30 times higher than the present day.

Similar fluctuations in OMZ intensity have occurred during the Dansgaard - Oeschger (D - O) events (millennial - scale abrupt climate oscillations) during the last glacial period (Cannariato and Kennett, 1999; Schmittner et al., 2007).

However, it's quite a different matter melting a long - lived massive ice sheet up to 1.5 km thick that covers over 70 % of the land surface (as happened at the end of the last glacial period), from melting isolated and much thinner ice caps / sheets that only cover about 11 % of the land surface (i.e. present - day).»

«Several recent studies have looked at the case for increased eruption activity from ice - capped stratovolcanoes at end of the last glacial period about 12,000 years ago and have come up with no hard evidence that these volcanoes experienced any substantial amount of increased eruption frequency, volume etc..

As ice from the last glacial period retreated, plants, animals and people left behind a detailed record of their environment.

Just 200 years before the young girls» short lifetimes, the last glacial period of the Pleistocene Epoch (2.6 million — 11,700 years ago) ended.

The earth is currently in an interglacial, and the last glacial period ended about 10,000 years ago.

High resolution characterization of the Indian monsoon over the last glacial period from Bitoo Cave, northern India Gayatri Kathayat, Hai Cheng, Ashish Sinha, R. L. Edwards

Although the last glacial period ended more than 8,000 years ago, its effects can still be felt today.