Sentences with phrase «warm climate phase»

In general when the planet is in a warm climate phase C02 levels are up two twice what we are at today.

Not exact matches

El Nino and La Nina refer to the «warm and cool phases of a recurring climate pattern across the tropical Pacific,» according to the National Oceanic and Atmospheric Administration.

The birds likely benefit when milder temperatures and more rain during the warm phases of the climate cycles make food more abundant in their winter quarters, Nott says.

Since 1999, the IPO has been in a negative phase but consecutive record - breaking warm years in 2014, 2015 and 2016 have led climate researchers to suggest this may have changed.

When the climate warmed in the late 1800s, it triggered the retreat phase of the tidewater glacier cycle as warm ocean water melted the ice.

Professor Michael Benton from the University of Bristol, another co-author of the study, said: «This work illustrates a case of the impact of climate change on the evolution of animal biodiversity, and shows that for crocodilians, warming phases of our earth's history constitute ideal opportunities to colonise new environments.»

For climate scientists, a major question is whether the coming event will be big enough to flip the world into the warm phase of the Pacific Decadal Oscillation (PDO), a 20 - to 30 - year climate cycle that is related to El Niño or La Niña conditions.

«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.»

In the end, natural gas will always be a fossil fuel that would need to be phased out (or its global warming pollution captured and stored) in the next few decades to avoid even worse climate change.

Warmer, drier climate phases can particularly increase fire risk when they follow cooler, wetter conditions that increase fire fuel availability via increased vegetation growth and reduced fire activity (Heyerdahl et al. 2008).

Climate patterns associated with the warm phase of the Atlantic Multi-decadal Oscillation (AMO).

El Niño is the warm phase of one of the dominant modes of climate variability, the El Niño - Southern Oscillation.

Scientists need to explain to the public that while they continue to study the details of anthropogentic global warming and consequent climate change, that we already know enough to be certain that continued unmitigated warming will be a disaster for all humanity, and that we urgently need to phase out all fossil fuel use as quickly as possible.

On Saturday, diplomats announced a new international agreement aimed at phasing out a family of climate - warming compounds called hydrofluorocarbons, or HFCs.

WASHINGTON — After a brief but lively internal debate, the Obama administration has decided not to seek an immediate phase - out of hydrofluorocarbons (HFC's), a potent group of climate - warming gases, under a treaty aimed at protecting the ozone layer.

Hank states,» That's a known reversing pattern — positive ACRI phase characterized by cyclonic ocean circulation and a warmer and wetter climate.»

Also, I'm not sure I see strong support for this concluding sentence: «Although polar bears have persisted through previous warm phases, multiple human - mediated stressors (e.g., habitat conversion, persecution, and accumulation of toxic substances in the food chain) could magnify the impact of current climate change, posing a novel and likely profound threat to polar bear survival.»

Remember, we are at or near what would, absent global warming, be the end of the current interglacial phase of the earth's million - year - old climate cycle.

A new paper by Andrew Dessler of Texas A&M University bolsters the established view of clouds» role as a feedback mechanism — but not driver — in climate dynamics through a decade of observation and analysis of El Nino and La Nina events (periodic warm and cool phases of the Pacific Ocean).

Enhance Cooperation on Hydroflurocarbons (HFCs): Building on the historic Sunnylands agreement between President Xi and President Obama regarding HFCs, the United States and China will enhance bilateral cooperation to begin phasing down the use of high global warming potential HFCs, including through technical cooperation on domestic measures to promote HFC alternatives and to transition government procurement toward climate - friendly refrigerants.

So, the Alaska climate site statement referring to the 1977 PDO shift as «natural» is misleading in the extreme in that the effect of global warming on the PDO warm phase would be with regard to its persistence and possibly its timing.

We have fairly high confidence that we observe the history of Heinrich events (huge discharges of ice - rafted debris from the Laurentide ice sheet through Hudson Bay that are roughly coincident with large southern warming, southward shift of the intertropical convergence zone, extensive sea ice in the north Atlantic, reduced monsoonal rainfall in at least some parts of Asia, and other changes), and also cold phases of the Dansgaard / Oeschger oscillations that lack Heinrich layers and are characterized by muted versions of the other climate anomalies I just mentioned.

There is also no reason to expect less warming in the future — in fact, perhaps rather the opposite as the climate system will catch up again due its natural oscillations, e.g. when the Pacific decadal oscillation swings back to its warm phase.

It's important to note that a substantial short - term influence on the globe's average temperature, the cycle of El Niño warmth and La Niña cooling in the tropical Pacific Ocean, was in the warm phase until May but a La Niña cooling is forecast later this year, according to the Climate Prediction Center of the National Oceanic and Atmospheric Administration.

[Response: There is evidence that the enhanced continental winter warming in the Northern Hemisphere, which has resulted at least in part from a recent trend towards the positive phase of the Arctic Oscillation (AO), may in fact also represent a response to anthropogenic impacts on climate.

Using the business - as - usual scenario for GHG radiative forcing (RCP8.5) and their novel estimate of Earth's warm - phase climate sensitivity the authors find that the resulting warming during the 21st century overlaps with the upper range of the Coupled Model Intercomparison Project Phase 5 (CMIP5) climate simulatphase climate sensitivity the authors find that the resulting warming during the 21st century overlaps with the upper range of the Coupled Model Intercomparison Project Phase 5 (CMIP5) climate simulatPhase 5 (CMIP5) climate simulations.

As Parties to Montreal Protocol negotiate a global agreement for an HFC phase - down this year, several safety standards and building codes are threatening to limit the climate ambition and effectiveness of this agreement by blocking the uptake of low global warming potential (GWP), energy efficient alternatives to hydrofluorocarbon (HFC)- based cooling around the world.

We are just in the warming phase of the climate pattern and this increased the sea level and the CO2 concentration in the atmosphere as shown:

It was then called the Great Pacific Climate Shift but since that time it has been subsumed into the PDO phase shift from cool to warm phase that supposedly has a thirty year period.

There is absolutely nothing to suggest that carbon dioxide is a climate driver beyond a spurious correlation with temperature in Antarctic ice cores where blinkered climate scientists talked up the supposed CO2 - amplified warming phase but then just ignored the cooling phase that told them CO2 was obviously dominated by natural forces.

We do know that ocean basins produce this oscillatory behavior — the El Nino / Southern Oscillation, the Arctic Oscillation, the Pacific Decadal Oscialltion, the NAO, the Madden - Julian Oscillation (Indian Ocean), but they seem to have a bit of a random component, their forcing mechanisms are poorly understood, their «phase changes» appear impossible to predict very far in advance, and they must also be sensitive to the overall climate warming.

If the slower cooling phase is still evident (as there is more CO2 in the atmosphere during the peak of the warm cycle which should keep temperatures warmer for longer) then this should constitute empirical evidence for CO2's effects on the climate.

This assumption is based on climate model results that gave high climate sensitivity for doubling of CO2 by smoothing out all the oscillation in GMST before the 1970s and leaving untouched the warming phase of the oscillation since then and calling it man - made global warming as shown below.

Couple that with the limited growth potential of CO2 concentrations and growing biological response (which likely lags concentration growth), and it doesn't even seem plausible that warming will be a net cost on a meaningful time scale (hey anything is possible — maybe there are temporary climate regimes where even mild ghe produces worse weather which we just haven't experienced yet — eg a portion of the - PDO phase).

Evidence suggests that the negative phase of the Arctic Oscillation was driven in part by warm air (air warmed by the dramatic seasonal loss of Arctic sea ice) 9 as well as by changes in snow cover over Eurasia driven by climate change.10 This event is part of an emerging trend in which a warming climate may paradoxically bring colder, snowier winters to northern Europe and the eastern United States.11

Figure 6 - surface temperatures for accelerated warming decades (positive IPO phase) in the CCSM4 climate model.

That way we would be prepared to deal with climate change be it a warming or a cooling phase.

Climate scenarios from the Half a degree Additional warming, Projections, Prognosis and Impacts project (HAPPI) are largely consistent with transient scenarios extracted from RCP4.5 simulations of the Coupled Model Intercomparison Project phase 5 (CMIP5).

If ocean oscillations are as powerful a climate driver as the anti-CO2 alarmists claim then this graph suggests a simple story: that cold Pacific surface waters swallowed up a big gulp of warmth from 1940 - 1970, which the PDO then belched back up during its warm - phase in the 80s and 90s.

Since most ODS are «super» greenhouse gases (GHG) with global warming potentials (GWP) hundreds or thousands of times greater than carbon dioxide (CO2), this phase - out has had dramatic impacts on mitigating climate change.

The gap at the end of the 70's is due to the step in temperature caused by the PDO phase shift and is known as the Great Pacific Climate Shift; but it is clear that the rate of increase is declining from the 90's to the noughties; the statement that the noughties is the warmest is therefore misleading; but what else is new with AGW.

Indeed, the majority of climate models suggest global warming will produce a more positive phase of the NAM during this century, although the models, and the modeling community, are not in complete agreement.

In short, Swanson and Tsonis hypothesized that when various natural oceanic cycles (PDO, AMO, etc.) synchronize (i.e. in their positive or negative phases), they can cause a short - term warming or cooling which could be described as a «climate regime shift.»

Also, the above chart of the 12 - month means clearly shows a climate that moves from cooling to warming phases, and then back - a natural oscillation that «catastrophic global warming» skeptics have long discussed, while being dismissed by the IPCC and its cohorts.

Nope, it will indeed continue to have phases of warming and cooling just as it did in the past, sans Venus conditions, though... because that is what climates do, just naturally.

Scientists need to explain to the public that while they continue to study the details of anthropogentic global warming and consequent climate change, that we already know enough to be certain that continued unmitigated warming will be a disaster for all humanity, and that we urgently need to phase out all fossil fuel use as quickly as possible.

Thinking the pre-1998 warming phase was of permanent nature, not transient, the consensus climate «experts,» and their sophisticated climate models, predicted this steady warming trend would just drone on year after year, as far as the mind could speculate.

Those oscillations increasingly appear to be the most powerful «climate control knobs» and many advocates of CO2 warming now blame the cool phases of these ocean oscillations for «masking» or «hiding» hypothesized heat.

The reality of the climate record is that a sudden natural cooling is far more to be feared, and will do infinitely more social and economic damage, than the late 20th century phase of gentle warming.

JimD, «This slower rate of warming — relative to climate model projections — means there is less urgency to phase out greenhouse gas emissions now»