Sentences with phrase «warm interglacial period»

It is obtained by comparing the current warm interglacial period, called the Holocene, which has existed on planet Earth for the past ten thousand years, with...»

Perhaps we should have a reminder graph at the top of this page which shows that our planet is on the downward path of a short [in climate terms] warm interglacial period in our history as we move into the next ice age.?

Over that time, the globally averaged temperature difference between the depth of an ice age and a warm interglacial period was 4 to 6 °C — comparable to that predicted for the coming century due to anthropogenic global warming under the fossil - fuel - intensive, business - as - usual scenario.

«We have analyzed the transition from the last glacial period until our present warm interglacial period, and the climate shifts are happening suddenly, as if someone had pushed a button,» said Dahl - Jenson.

Jim D You still have not explained why you are working so hard to avoid warming and thus to encourage a return from the current warm interglacial period back down to the full glaciation temperatures.

Paleo climate evidence shows we hae the majority of the warm interglacial period behind us and are moving towards the end of the holocene interglacial.

The last two abrupt warmings at the onset of our present warm interglacial period, interrupted by the Younger Dryas cooling event, are investigated in high temporal resolution from the Greenland NGRIP ice core.

For example, atmospheric carbon dioxide grew by approximately 30 % during the transition from the most recent cold glacial period, about 20,000 years ago, to the current warm interglacial period; the corresponding rate of decrease in surface ocean pH, driven by geological processes, was approximately 50 times slower than the current rate driven largely by fossil fuel burning.

If we look to roughly 325,000 years ago, based on the Vostok data above, we see that Earth was at the peak of a warm interglacial period.

But an ice core collected in nearby Greenland suggests that the planet experienced continuous cold from 40,000 to about 115,000 years ago, when the last warm interglacial period ended, Miller said.

For example, the polar bear specimen from roughly 120,000 years ago survived in Svalbard during a warm interglacial period because that Arctic archipelago remained more frozen than other areas.

Researchers from the Niels Bohr Institute have analysed the natural climate variations over the last 12,000 years, during which we have had a warm interglacial period and they have looked back 5 million years to see the major features of the Earth's climate.

Many of the glaciers that jut out into the ocean are thinning, but whether the ice sheet itself has remained stable and intact, even during warm interglacial periods, is a matter of considerable debate.

Previous estimates suggested that peak temperatures during the warmest interglacial periods — which occurred at around 125,000, 240,000 and 340,000 years ago — were about three degrees higher than they are today.

The sediment cores used in this study cover a period when the planet went through many climate cycles driven by variations in Earth's orbit, from extreme glacial periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like today's.

Ice sheet models can be run through many glacial cycles (i.e. cold glacial periods and warm interglacial periods).

Historically, methane concentrations in the world's atmosphere have ranged between 300 and 400 nmol / mol during glacial periods commonly known as ice ages, and between 600 to 700 nmol / mol during the warm interglacial periods.

Substantial and correlated changes in marine carbonate (CaCO3) content of oceanic sediments commonly accompany the transitions from cold glacial periods to warm interglacial periods.

a) a glacial cycle over 100,000 years with warm interglacial periods in red and the long glacial period in between.

So now I answer the «ice - age» denialist argument (denialists usually trot out ALL their inconsistent & contradictory arguments) this way: I draw a sine - wave in the air with my hand, saying, yes, that the normal fluctuation over a long geological timeframe is to alternate between cold ice ages and warm interglacial periods, and that now we are right here in a warm interglacial period (my hand raised at the top of the wave), and if there were no human GHGs, then we would expect that over a long time frame we'd be sliding down into an ice age.

In the past 2m years the temperature has gone up and down like a yo - yo as ice ages have alternated with warmer interglacial periods.

However, we know that severe and abrupt climate shifts of global extent have occurred (infrequently) during glaciations, and almost never during warmer interglacial periods such as the current Holocene.

The initial forcing that initiated the warming interglacial periods may have been completely compensated by the time the atmospheric concentration reached 300 PPM.

But warm interglacial periods had certainly been subject to big swings of temperature lasting for centuries.

With the onset of the warmer interglacial period CO2 rebounded to 280 ppm.

There is strong evidence, discussed above, that the sea level was several metres higher in recent warm interglacial periods, consistent with our data interpretation.

Loutre and Berger (2002) suggest that Marine Isotope Stage 11 (MIS 11) from 405 to 340 ka would make a better analogue for future climate than the Last Interglacial, due to it being a warmer interglacial period, but with an orbital insolation signal that correlates closely with the recent past and future, giving a much better comparison of orbital forcing.

Not exact matches

For the last 2.5 million years, Earth settled into a rather unusual period of potential instability as we rocked back and forth between ice ages and intervening warm periods, or interglacials.

Then they lugged them back to Ohio to begin independent study (IS) projects on characterizing the change in sea levels during the last interglacial warming period.

Instead, the fossil record indicates they vanished during the Earth's glacial - interglacial transition, which occurred about 12,000 years ago and led to much warmer conditions and the start of the current Holocene period.

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.

One period of particular interest is a warm, wet interglacial stage known as the Eemian that occurred from 124,000 to 119,000 years ago, featuring average global temperatures about 2 °C warmer than today.

The researchers make their case in part by describing paleoclimate data from the Eemian, an interglacial (warm) period that lasted from about 130,000 to 115,000 years ago.

What happens when the world moves into a warm, interglacial period isn't certain, but in 2009, a paper published in Science by researchers found that upwelling in the Southern Ocean increased as the last ice age waned, correlated to a rapid rise in atmospheric carbon dioxide.

«The climate changed quite often from warmer to colder, and vice versa, but at all times it was much colder than the interglacial period that we have lived in for the past 10,000 years.»

That was the last time Earth experienced a long period with a climate that, on average, was warm before cold ice ages began to alternate with mild interglacials.

These remains confirm that the deposits date to a warm period of climate around 420,000 years ago, the so - called Hoxnian interglacial, when the climate was probably slightly warmer than the present day.

During the last 800,000 years, CO2 fluctuated between about 180 ppm during ice ages and 280 ppm during interglacial warm periods.

«Currently, our planet is in a warm phase — an interglacial period — and the associated increased climate sensitivity needs to be taken into account for future projections of warming induced by human activities.»

Over the past two million years, Earth has experienced long glacial periods separated by short, warmer intervals known as interglacials.

The dominant signal in the temperature record (the white line in the above figure) is a 100,000 year cycle where long ice ages are broken by short warm periods called interglacials.

There have not and will not always be ice ages because the Earth can be just too warm or ill - conditioned to respond in that manner (The Earth might also become too cold to have interglacials within an ice house period — though I'm not sure if that has ever happenned outside the Proterozoic snowball / slushball episodes).

These glacials have been punctuated by interglacials, short warm periods which typically last 11,500 years.

Running simulations with an Earth System model, the researchers find that if atmospheric CO2 were still at pre-industrial levels, our current warm «interglacial» period would tip over into a new ice age in around 50,000 years» time.

The shading indicates the last interglacial warm periods.

This article will use the term ice age in the former, glaciological, sense: glacials for colder periods during ice ages and interglacials for the warmer periods.

Since the warming rate is twice as fast as the interglacial cooling rate, the typical interglacial period has an asymmetrical pattern suggesting Earth heats up due to natural processes more rapidly than when it cools.

Figure 4 compares trendlines for each warming onset, plateau and cooling segment of the five interglacial periods.

Amplitude and Duration: The most significant events are terminations of the glacial period and rapid onset of global warming of the interglacial period.