Sentences with phrase «with warmer interglacial»

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.

The ice ages were actually many pulses of cold glacial phases interspersed with warmer interglacials.

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

Not exact matches

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.

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.

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.

Figure 8: Comparison of modern warming trends with interglacial long - term trends.

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.

The planet went from interglacial warm to glacial cold during the Younger Dryas period with cooling for around 1000 years.

Inconvenient: New paper finds the last interglacial was warmer than today — not simulated by climate models Watts Up With That?

e.g. models of eustacy («worldwide change of sea level as contrasted with local diastrophic uplift or subsidence of the land») vs isostacy (glacial rebound following glaciation / melting) vs local sinking / rising from glaciation / interglacial warming, CO2, and / or solar variations, and their causes.

It seems to me that a common mistake, is the assumption that since our current interglacial began with periods of very rapid warming, that somehow indicates that rapid warming is currently possible.

The last five glacial cycles contain two interglacials that were up to 2C warmer than the pre-industrial state, with sea level up to 10 m higher than today.

I consider anthropogenic global warming a hedge against the forces (the Holocene Interglacial is getting long in tooth to begin with) arrayed in favor of a cooling planet.

It seems clear enough from evidence of the geologic past that before the earth started ringing like a bell every 120K years from glacial to interglacial with the former dominating the other 10:1 in persistence, the Eocene optimum 50 million years ago the earth was ice - free, green from pole to pole, it was about 11F warmer overall, with the most dramatic warming in the highest latitudes (right where you'd want it if you could ask for it), and atmspheric CO2 was several times what it is today, which makes sense in light of much warmer global ocean not able to hold as much CO2.

We are currently in the interglacial with the lowest temps since the Minoan Warm.

Although it is commonly assumed atmospheric CO2 and ocean surface pH are in equilibrium, studies examining various time frames from daily and seasonal pH fluctuations (Kline 2015) to the millennial scale transitions from the last ice age to our warm interglacial (Martinez - Boti 2015), demonstrate surface ocean pH has rarely been in chemical equilibrium with atmospheric CO2.

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

The Eemian Interglacial was also warmer than now with an ice - free Arctic across which gray whales made it from the Atlantic to the Pacific.

would then today's serious climatologists and glaciologists be wringing their hands and getting grayhaired because they wouldn't be able to come up with a natural Milankovic type or other explanation for the present post-LIA interglacial warming of the world and imminent disappearance of Tuvalu?

And in each of the previous four or five interglacial periods, which occur every 125,000 years, the temperature has been up to 5 degrees Celsius warmer than it is today, and humankind can not have had anything to do with it.

From model estimates, CO2 (ALONG WITH OTHER GREENHOUSE GASES CH4 and N2O) causes about HALF of the full glacial - to - interglacial warming.

You see, my ancestors always knew this interglacial was just a freak bout of warm weather, so we've been keeping up with the best cave locations for when it ends.

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

3 / There has been a succession of cold and warm periods all over Holocene interglacial, with a period of roughly 1 millennium.

For earlier times, we adopt Greenland temperature estimated as follows (33): For the period 128,700 B.P. to 340,000 B.P., this temperature was derived from a proxy based on Antarctic ice core methane data using the relation T = − 51.5 + 0.0802 [CH4 (ppb)-RSB- from a linear regression of Greenland temperature estimates on Antarctic methane for the period 150 B.P. to 122,400 B.P.. For the remaining period of 122,400 B.P. to 128,700 B.P., data from a variety of climate archives indicate that Greenland warming lags that of Antarctica, with rapid warming commencing around 128.5 ky B.P. in the northern North Atlantic and reaching full interglacial levels by about 127 ky B.P. (51).

More recently in geological time, the climatic warming at the last glacial - interglacial transition was coincident with the extinction of 72 percent of the large - bodied mammals in North America, and 83 percent of the large - bodied mammals in South America — in total, 76 genera including more than 125 species for the two continents (Barnosky and Lindsey, 2010; Brook and Barnosky, 2012; Koch and Barnosky, 2006).

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

Comparing the influences on the Last Interglacial climate with those assumed in future climate projections is problematic owing to fundamental differences, especially orbital forcing, seasonal warming, and greenhouse gas concentrations.

Russian astro - physicist Milankovich developed the understanding of the combinations of these cycles and how they interact to create out 30ma trend of long gradually declining ice ages interspersed with relatimely brief global warm interglacials (like our present).

MIS 11 also appears to have been possibly the warmest and longest interglacial of the past 5 million years and had an extended period with little or no continental ice, which is projected to occur under some future global warming scenarios.

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 orbiInterglacial, 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 orbiinterglacial period, but with an orbital insolation signal that correlates closely with the recent past and future, giving a much better comparison of orbital forcing.

That this was unusual, even the strongest trend since the current interglacial became established is perfectly consistent with only attributing 1/3 of warming to human activity.

The deep Atlantic chemical changes were similar in magnitude to those associated with glaciations, implying that the canonical view of a relatively stable interglacial circulation may not hold for conditions warmer / fresher than at present.

Past interglacial warming were triggered by sharp spikes in solar irradiation associated with the Earth's position relative to the sun (Milankovic cycles), with consequent feedback release of greenhouse gas (CO2, CH4) from the oceans and the biosphere, resulting in atmospheric infrared radiation effects and in melting of ice sheets, which amplify global warming.

Now, it may be that along with this longer interglacial comes the idea that over shorter timescales (of, say, 10000 or 20000 years) we would actually expect some a little warming although I haven't heard this case made... and would expect that any such effect would be quite modest.

It is noteworthy that models in general predict the greatest amounts of future warming, while observationally - based studies, often about interglacial - glacial transitions, or differences between geological eras, tend to come up with less warming.

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...»

The Last Interglacial was also a period with higher global sea - level and a corresponding reduction in ice sheet area and volume, which are consistent with IPCC predictions for responses to future global warming.

The study, led by James Hansen of NASA's Goddard Institute for Space Studies, N.Y., along with scientists from other organizations concludes that, because of a rapid warming trend over the past 30 years, the Earth is now reaching and passing through the warmest levels in the current interglacial period, which has lasted nearly 12,000 years.