Sentences with phrase «abrupt warming»

SUMMARY: Abrupt warming in Arctic could lead to catastrophic consequences says top scientist Dr. Peter Gleick, ICCI Director Pam Pearson, and the founder of Paleoceanography, Dr. James Kennett.

Minimal geologic methane emissions during Younger Dryas - Preboreal abrupt warming event.

Two University of Michigan researchers and a Florida colleague found two abrupt warming spikes in ocean temperatures that coincide with two previously documented extinction pulses near the end of the Cretaceous Period.

«Scientists throw light on mysterious ice age temperature jumps: New study reveals carbon dioxide «tipping point» that triggered abrupt warming during glacial periods.»

«Minimal Geological Methane Emissions During the Younger Dryas - Preboreal Abrupt Warming Event.»

According to scientists, the majority of previous mass extinctions in the geologic record were characterized by abrupt warming between 6 to 7 degrees Celsius.

A cursory analysis of the past 10,000 years global reconstructions quickly shows that there has not been a single significant abrupt warming event.

While major oceanographic and ecological disruption due to abrupt climate warming occurs on the timescale of a human life (from decades to centuries), recovery from abrupt warming disturbances can take hundreds to thousands of years.

According to the researchers, the first abrupt warming period beginning at 14,700 years ago lasted until about 12,900 years ago, when deep - freeze conditions returned for about 1,200 years before the onset of the second sharp warming event.

Indeed abrupt warm water events like El Nino have induced widespread bleaching and high mortality.

I have been arguing that the climate models are inadequate and that a catastrophic abrupt warming is inevitable, but I too am being scorned!

The isotopic analysis showed that seawater temperatures in the Antarctic in the Late Cretaceous averaged about 46 degrees Fahrenheit, punctuated by two abrupt warming spikes.

But what eventually happened, is that the warm water reached a critical point, surged upwards to the surface, and contributed to the abrupt warming of the surface water and atmosphere,» says Ezat.

The Paleogene is an interesting time to study because global climate changed dramatically during that interval — including an abrupt warming event around 55 million years ago.

An abrupt warming of oceanic intermediate waters could have initiated the thermal destabilization of sediment - hosted methane gas hydrates and potentially triggered sediment slumps and slides.

We are talking about huge physical signs of abrupt warming that can be seen from space.

It shows the warming as the last ice age ended (left), a period when temperatures were warmer than today, a cooling starting 5,000 years ago and an abrupt warming in the last 100 years.

The best - studied case so far is the abrupt warming in the Northern Hemisphere about 15,000 years ago that started the ice sheets to melting.

The Bølling - Allerød interstadial was an abrupt warm and moist interstadial period that occurred during the final stages of the last glacial period.

But there is likely a chain of «causes,» perhaps different for the abrupt warmings than for the abrupt coolings.

The reconstruction shows an abrupt warming in the last 100 years (see the left side of figure 1).

It is thought that some hunters arrived in Alaska about 15,000 years ago during that abrupt warming episode known as the Bølling - Allerød, where the Northern Hemisphere suddenly warmed up to almost modern levels (and in only a few decades, too).

For example when discussing the abrupt warming in the Arctic from the 1920s to 40s, Sweden's top climate scientist and IPCC member Lennart Bengtsson wrote:

Arguably abrupt cooling could be much more of a threat to civilization than abrupt warming (as conservatives argue).

The diagram was a striking depiction of the abrupt warming that had occurred since the Industrial Revolution compared to what happened before.

The most likely response of the climate to the anthropogenic increase in CO2 is thus an abrupt warming, not the monotonous rise in temperature related to the linear rise in CO2 that everyone expects.

Andy Revkin, an extremely experienced reporter, certainly didn't interpret Marcott et al as taking the position that their reconstruction wasn't «statistically robust» in the modern portion: he titled his article «Scientists Find an Abrupt Warm Jog After a Very Long Cooling».

graph of Northern Hemisphere temperature shows 900 years of gentle cooling with only minor fluctuations (handle), followed by 100 years of abrupt warming (blade).

One thing most seem to agree on is the abrupt warming spike caused by the 1997/98 El Niño event.

Carbon and oxygen isotope ratios both shift at the same boundary; the former shows disruption of the carbon cycle, while the latter shows an abrupt warming of about 6 degrees.

Looking at Figure 1 in Gillett et al. 2012 there is an abrupt warming of about 0.1 ºC at that time - perhaps explains some of the post-2000 discrepancy in this model.