Sentences with phrase «ice changes drive»

Schematics of the teleconnection through which Arctic sea - ice changes drive precipitation decrease over California.

arctic chart Schematics of the teleconnection through which Arctic sea - ice changes drive precipitation decrease over California.

Not exact matches

If so, the interaction between hydrofracturing and ice - cliff collapse could drive global sea level much higher than projected in the Intergovernmental Panel on Climate Change (IPCC)'s 2013 assessment report and in a 2014 study led by Kopp.

Driven by stronger winds resulting from climate change, ocean waters in the Southern Ocean are mixing more powerfully, so that relatively warm deep water rises to the surface and eats away at the underside of the ice.

While Antarctic ice shelves are in direct contact with both the atmosphere and the surrounding oceans, and thus subject to changes in environmental conditions, they also go through repeated internally - driven cycles of growth and collapse.

New research published in Nature Climate Change has revealed how strengthening winds on the opposite side of Antarctica, up to 6000kms away, drive the high rate of ice melt along the West Antarctic Peninsula.

It's OK to state that, «The common belief that carbon dioxide is driving climate change is at odds with much of the available scientific data: data from weather balloons and satellites, from ice core surveys, and from the historical temperature records» when this is clearly untrue.

Changes in flow patterns of warm Pacific Ocean air from the south were driving earlier spring snowmelt, while decreasing summer sea ice had the greatest influence on later onset of snowpack in the fall.

«Greenland's ice is getting darker, increasing risk of melting: Feedback loops from melting itself are driving changes in reflectivity.»

Climate change is driving the Greenland Ice Sheet to melt, which is contributing to sea level rise.

While some may see evidence of rapid glacier thinning in the past and again today as evidence that the West Antarctic Ice Sheet is nearing a collapse driven by human - caused climate change, Steig said at this point, scientists just don't know whether that is the case.

But the ice core - derived climate records from the Andes are also impacted from the west — specifically by El Niño, a temporary change in climate, which is driven by sea surface temperatures in the tropical Pacific.

There is some evidence that the ice came and went in regular cycles, driven by changes in Earth's orbit.

«Formation of coastal sea ice in North Pacific drives ocean circulation, climate: New understanding of changes in North Pacific ocean circulation over the past 1.2 million years could lead to better global climate models.»

«This shift to earlier weaning age in the time leading up to woolly mammoth extinction provides compelling evidence of hunting pressure and adds to a growing body of life - history data that are inconsistent with the idea that climate changes drove the extinctions of many large ice - age mammals,» said Cherney, who is conducting the work for his doctoral dissertation in the U-M Department of Earth and Environmental Sciences.

However, the simulations indicate that the sea - ice driven precipitation changes resemble the global rainfall patterns observed during that drought, leaving the possibility that Arctic sea - ice loss could have played a role in the recent drought.

We determine that this difference is driven by the growth and retreat of large continental ice sheets that are present in the cold ice - age climates; these ice sheets reflect a lot of sunlight and their growth consequently amplifies the impact of CO2 changes.»

The data that Old Weather volunteer citizen scientists meticulously transcribe from the logbooks are used to drive climate and sea ice models to help understand changes and improve predictions.

That contrast is evident everywhere in his life: He can sit back and sip ice tea on a quiet summer afternoon, but he is also driven to change the world.

«Thus the increased snowfall we report here has not led to thickening of the ice sheet, but is in fact another symptom of the changes that are driving contemporary ice sheet loss.»

o Ice core and sea - bed sediment measurements show no evidence that changes in CO2 drive world temperatures or climate.

Quick recovery is consistent with the Southern Ocean - centric picture of the global overturning circulation (Fig. 4; Talley, 2013), as the Southern Ocean meridional overturning circulation (SMOC), driven by AABW formation, responds to change in the vertical stability of the ocean column near Antarctica (Sect. 3.7) and the ocean mixed layer and sea ice have limited thermal inertia.

It was generally believed that increased warm ocean water, in contact with the ice, was driving the changes (Shepherd et al., 2001).

He then uses what information is available to quantify (in Watts per square meter) what radiative terms drive that temperature change (for the LGM this is primarily increased surface albedo from more ice / snow cover, and also changes in greenhouse gases... the former is treated as a forcing, not a feedback; also, the orbital variations which technically drive the process are rather small in the global mean).

Slow feedbacks, such as change of ice sheet area and climate - driven changes of greenhouse gases, are not included.

The tracks, carved on a lake beside the event hotel and extending several miles depending on the configuration, feature — like with Lapland Ice Driving — the real - world layouts of circuits such as Spa - Francorchamps and Barcelona, minus the elevation changes, naturally.

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It can change the amount of power allowed when driving on ice or other road conditions, as well as the speed of the car, for a next - generation four - wheel - drive system that delivers stable driving on slippery roads and when cornering.

Regardless, I would posit the worsening winter ice formation is as expected given the poles suffer first and winters warm faster than summers, BUT that this is happening within two years of the EN peak, which was my time line in 2015, one wonders if the combination of warm EN - heated Pacific waters (oceans move slowly) and warm air are a trailing edge of the EN effect OR this is signallibg a phase change driven by that EN, or is just an extreme winter event.

An ice - free North coast in the past few millenia says nothing about the desirability of driving ice melt (or climate change generally) at extremely rapid rates.

Here we show that fluctuations in Antarctic Ice Sheet discharge caused by relatively small changes in subsurface ocean temperature can amplify multi-centennial climate variability regionally and globally, suggesting that a dynamic Antarctic Ice Sheet may have driven climate fluctuations during the Holocene.

More ground turns from white reflective snow to black, heat absorbant dirt.The same effect occurs as sea ice is lost.The corals blanch, and, as I stated last year on this site, the shutdown of the north Atlantic current will occur, since the salinity level studies I spoke of last year, off Greenland, continue to show that the upwelling mechanisms driving the North Atlanic current are in severe jeapordy, because the change in salinity levels effects the driver of the current, the upwelling and downwelling of different salinity levels off Greenland.

Given that the Milankovitch TSI forcing is less than + - 0.1 %, while nonetheless driving ice - age cycles, the current anthro forcing of > 0.85 W / m ^ 2 (> +0.2 %) can hardly be called «a small change in forcing».

Although the primary driver of glacial — interglacial cycles lies in the seasonal and latitudinal distribution of incoming solar energy driven by changes in the geometry of the Earth's orbit around the Sun («orbital forcing»), reconstructions and simulations together show that the full magnitude of glacial — interglacial temperature and ice volume changes can not be explained without accounting for changes in atmospheric CO2 content and the associated climate feedbacks.

Observed arctic sea ice reductions can be simulated fairly well in models driven by historical circulation and temperature changes.

If CO2 changes drive both ice ages and SSTs, and we are pumping CO2 into the air at a faster rate than naturally possible, don't you think there's cause for alarm?

[Response: To pre-empt some mutual incomprehension, note that industrial CO2 rises are certainly an anthropgenic forcing and not a response (see here and here), but clearly CO2 changes over glacial - interglacial cycles is both a response (to Milankovitch - driven changes) and a forcing (since the additional radiative forcing from CO2 is about a third of that needed to keep the ice ages as cold as they are — see here).

I am under the impression that it is driven by CO2 mediated ice - loss that generates albedo changes resulting in positive feedbacks that increase further melting.

Their observations were that the region of lightly grounded ice at the glacier terminus is extending upstream, and the changes inland are consistent with the effects of a prolonged disturbance to the ice flow, such as the effects of ocean - driven melting.

The modern picture seems to be that ice ages tend to end abruptly, but the onset of an ice age is gradual, driven by changes in sunlight across the northern land masses and decreasing atmospheric CO2 levels.

And changes in ice cover are driving most of Arctic temperature amplification.

I was aware of Milankovitch cycles and their role in driving ice ages and so I was somewhat confused by Al Gore's implicit attribution of global temperature changes to CO2 in An Inconvenient Truth.

When I give talks about climate change, the question that comes up most frequently is this: «Doesn't the relationship between CO2 and temperature in the ice core record show that temperature drives CO2, not the other way round?»

See for example Joe Romm, «NOAA: Climate Change Driving Arctic Into A «New State» With Rapid Ice Loss And Record Permafrost Warming,» Climate Progress, Dec 6, 2012.

Researchers are confident that they understand the cycle of Ice Ages, and they also have a clear idea that the biosphere plays a hand in keeping the planet at liveable temperatures, but they also know that the high altitudes are more than usually affected by climate change driven by ever - higher ratios of greenhouse gases released by the combustion of fossil fuels by seven billion humans.

There is no empirical evidence to support assertions and computer models that claim carbon dioxide drives climate change or to suggest that greenhouse gases have supplanted the complex natural forces that have produced big and little ice ages, floods and droughts, and stormy and quiescent periods throughout Earth's history.

It seems that every day scientists are telling us how climate change is causing the Antarctic ice sheet to melt, threatening to raise sea levels and drive the region's iconic penguins into extinction.

«If loss of sea ice is driving changes in the jet stream, the jet stream is changing Greenland, and this, in turn, has an impact on the Arctic system as well as the climate.

It would require a much stronger relationship of temperature driving CO2 than occurred during the ice age — interglacial oscillations (and it is also important to remember that those changes occurred over much longer timescales too... which is the presumed reason why there is a several hundred year lag time between temperatures starting to rise or fall and CO2 starting to rise or fall).

«The changes are happening so fast in the Arctic — with sea - ice loss, with increased time of no snow cover — that that's really the driving feature.