Sentences with phrase «warming forces driving»
Scientists simulate the climate warming forces driving the jet stream's sometimes erratic path
https://www.pnnl.gov/ Not exact matches
Reporting in the journal Nature, an international team of researchers led by British Antarctic Survey (BAS) explains that wind - driven incursions of warm water forced the retreat of glaciers in West Antarctica during the past 11,000 years.
The two main forces that conspire to destroy Earth's massive polar ice sheets are heat, which melts their surfaces via sunlight and warm air, and gravity, which drives glaciers to slide to the sea.
Researchers are still investigating what forces, including global warming, are driving Antarctic sea ice trends.
Soon is a leading skeptic of the widely accepted science surrounding climate change, In the International Journal of Public Opinion Research, a study titled «The Structure of Scientific Opinion on Climate Change» found that 97 percent of scientists surveyed believed global warming already is ongoing, with 84 percent of scientists surveyed believing human - produced greenhouse gases were the driving force behind the change.
Onset of deglacial warming in West Antarctica driven by local orbital forcing.
«We use a massive ensemble of the Bern2.5 D climate model of intermediate complexity, driven by bottom - up estimates of historic radiative forcing F, and constrained by a set of observations of the surface warming T since 1850 and heat uptake Q since the 1950s... Between 1850 and 2010, the climate system accumulated a total net forcing energy of 140 x 1022 J with a 5 - 95 % uncertainty range of 95 - 197 x 1022 J, corresponding to an average net radiative forcing of roughly 0.54 (0.36 - 0.76) Wm - 2.»
«The listing not only raised public awareness that climate change is already driving vulnerable species like the polar bear toward extinction, but also forced the Bush administration to adopt the consensus view of the world's scientists on global warming.»
If human - induced global warming, among other factors such as human - driven pollution and human - forced overpopulation, serve decisively to precipitate the massive extinction of biodiversity, the irreversible degradation of Earth's environment and the reckless dissipation of its resources, so as to make our planetary home unfit for life as we know it, then is no one to bear responsibility for such a colossal wreckage as we could help to perpetrate in these early years of Century XXI?
[1] CO2 absorbs IR, is the main GHG, human emissions are increasing its concentration in the atmosphere, raising temperatures globally; the second GHG, water vapor, exists in equilibrium with water / ice, would precipitate out if not for the CO2, so acts as a feedback; since the oceans cover so much of the planet, water is a large positive feedback; melting snow and ice as the atmosphere warms decreases albedo, another positive feedback, biased toward the poles, which gives larger polar warming than the global average; decreasing the temperature gradient from the equator to the poles is reducing the driving forces for the jetstream; the jetstream's meanders are increasing in amplitude and slowing, just like the lower Missippi River where its driving gradient decreases; the larger slower meanders increase the amplitude and duration of blocking highs, increasing drought and extreme temperatures — and 30,000 + Europeans and 5,000 plus Russians die, and the US corn crop, Russian wheat crop, and Aussie wildland fire protection fails — or extreme rainfall floods the US, France, Pakistan, Thailand (driving up prices for disk drives — hows that for unexpected adverse impacts from AGW?)
It's a theory now substantiated by physics and observations regarding total radiative forcing and sensitivity, and in our current case of warming attributable to increased forcing agents form human / industrial means we are experiencing a change in trends pertaining to weather events driven by total change factors.
My question is: Since these earlier relatively slight forcings prompted such considerable carbon feedbacks that drove warming much further than it would have gone otherwise, should we not expect some sort of carbon feedback to kick in from our considerable «artificial» forcing / warming?
Then tell us what the mechanism or change in forcing is that is driving this * natural * warming.
Greenhouse gas emissions are completely overwhelming all other changes in forcing in driving global warming.
The real driving force here has nothing to do with the Climate Change (nee» Global Warming) and has everything to do with the obsessive desire to control the lives of individuals.
This paper builds on a massive data analysis that has been heavily vetted for more than a year, but pushes into new terrain with particularly strong conclusions about the human forces driving warming.
I've been to the Arctic three times for the newspaper since 2003 — visiting the North Slope, North Pole, and Greenland to examine what mix of human and natural forces is driving the warming and ice retreats and the implications of having increasing amounts of open water in summers in a region increasingly seen as a resource trove and shortcut for shipping.
The total warming from methane, nitrous oxide and aerosol emissions were each estimated from climate model simulations driven by historical forcing pathways for each gas, and were allocated to individual countries as described in section 2.
Basically natural forces have driven climate in the past but theres no evidence they are causing recent warming.
Obama's climate plan would double the yearly addition to the forces driving global warming by 2050 and he's selling this as a plan to «slow» it down.
Johanessen et al conclude that the consistent appearance of recent warming with GHGs simulated supports the interpretation that the current warming is a forced response to GHGs, of which the increase is overwhelmingly human driven.
Like I say, you see a richness of behaviour in the models including in some occasions behaviour that at first sight looks not dissimilar to that highlighted in the observations by the Thompson paper and this on top of the «external control» as we called it in our 2000 paper in Science of the external forcings in a particular model which drives much of the multi-decadal hemispheric response in these models and which, in terms of the overall global warming response, is dominated by greenhouse gases.
The driving force of the environmental movement is not a cleaner planet — or a world that doesn't get too hot, in the case of the global warming issue — but a leftist, egalitarian urge to redistribute wealth.
The dominant driving force of «climate change» as the term is being used in public policy is «global warming», an average increase in global temperature.
Nearly half of meteorologists and atmospheric science experts don't believe that human activities are the driving force behind global warming, according to a survey by the American Meteorological Society.
Roy Spencer is the driving force behind the «internal variability» hypothesis, which posits that some unknown and undefined mechanism is causing cloud cover to change, which, by changing the overall reflectivity of the Earth, is the driving force behind the current global warming.
The summary, released on Friday in Paris, was the first from the group to pinpoint with greater than 90 percent certainty that humans had become the main force driving warming and that centuries of increasing temperatures and seas could be blunted only if emissions of heat - trapping gases were promptly reduced.
«It is a mystery that has given cover to forces arrayed against the reality of human - driven global warming.
By continuing this trend, we can make a rough guess for how near - future climate may develop if the forces driving global warming continue at their present rate.
But just as politicians can't repeal the laws of physics driving global warming, so there are other forces largely beyond their control.
Even though human civilisation is threatened by grave environmental crises and global warming and many people are scared of impending catastrophe, Resurgence's vision is not driven by doom and gloom; rather it is inspired and motivated by love of nature, respect for the earth, reverence for all life and a fair «deal» to all people, believing that the power of love is greater than the force of fear and despair.
Warm tropical water forced by tides and Coriolis effect into a bottleneck created by a land mass funnel causes a small sensible energy fluctuation that drives folks absolutely nuts trying to figure it out.
Canlorbe: You suggest that the Sun's behavior is the driving force of climate warming, not factory smokestacks, urban sprawl or our sins of emission.
Here, the large scale forcings such as solar input, albedo, and GHG warmings drive the climate state.
Last week, a team of 19 top climate scientists from government labs in the United States and Europe reported that the buildup of human - induced greenhouse gases in the atmosphere appeared to be the primary driving force behind warmer oceans that fuel more powerful hurricanes.
For reasons that will soon become clear my former pride at being an APS Fellow all these years has been turned into shame, and I am forced, with no pleasure at all, to offer you my resignation from the Society.It is of course, the global warming scam, with the (literally) trillions of dollars driving it, that has corrupted so many scientists, and has carried APS before it like a rogue wave.»
«We use a massive ensemble of the Bern2.5 D climate model of intermediate complexity, driven by bottom - up estimates of historic radiative forcing F, and constrained by a set of observations of the surface warming T since 1850 and heat uptake Q since the 1950s... Between 1850 and 2010, the climate system accumulated a total net forcing energy of 140 x 1022 J with a 5 - 95 % uncertainty range of 95 - 197 x 1022 J, corresponding to an average net radiative forcing of roughly 0.54 (0.36 - 0.76) Wm - 2.»
«the 1700 - present greenhouse gas forcing is more than double the 1700 - present solar forcing and hence the warming trend over that period in the model is driven mainly by GHGs.»
''... with regard to the IPCC claim that «the increase in atmospheric concentrations of greenhouse gases (including CO2) is the driving force for climate warming,» they note the following four problems:
«Instead, observations constrain SW to be at the upper end of the CMIP5 range, implying that OLR recovers quickly in response to GHG forcing and that global warming is driven by enhanced ASR.»
Other Republican candidates should gleefully (and aggressively) point out that Huntsman is indeed «crazy» because he refuses to accept the latest climate research and empirical evidence that proves natural forces are the primary forces driving warming and climate change, not the trace gas CO2.
Clouds» impact on climate would obviously change as the world warms (a feedback) but, if solar - magnetic effects change clouds, as now seems likely, clouds could also drive climate change (a forcing).6, 7
The bottom line is that humans are the driving force behind the current global warming.
These emperor and king tides are primarily driven by sea level rise — a knock on impact of human - forced warming.
3) Attribution studies - many studies have been performed to try and determine the causes of the observed global warming, and every such study has been consistent in concluding that humans are the driving force.
None of this, though, takes anything away from ongoing warming driven by ongoing increases in forcing as Hypothesis 3 is only concerned with shifts away from the longer term forced trend.
So, basically, natural forcings drove the warming from the first half of the 20th century and earlier, via the sun and solar cycles.
We show that although increases in greenhouse - gas concentrations have driven the observed warming over the past century, approximately 60 % of the greenhouse - gas - induced warming has been offset by the combined response to other anthropogenic forcings, which is substantially greater than the fraction of global greenhouse - gas - induced warming that has been offset by these forcings.
When CO2 rises, the imbalance rises, but as the climate responds with a rising temperature, that imbalance is partially restored toward its earlier value, and so the magnitude of the driving force for warming will always be less than the magnitude of the difference in CO2 levels.
More information: Jonathan L. Baker et al, Holocene warming in western continental Eurasia driven by glacial retreat and greenhouse forcing, Nature Geoscience (2017).