Sentences with phrase «caused by human greenhouse gas emissions»

Therefore, I think a statement like «The green bar shows the amount of warming caused by human greenhouse gas emissions during that time.»

The green bar shows the amount of warming caused by human greenhouse gas emissions during that time.

Together, these lines of evidence provide a conceptual and scientific backing to the theory of climate change caused by human greenhouse gas emissions that is simply absent for alternative theories, such as that there is no change or that the change is caused by something different.

To better assess how climate change caused by human greenhouse gas emissions will likely impact wheat, maize and soybean, an international team of scientists now ran an unprecedentedly comprehensive set of computer simulations of US crop yields.

Coleman went on to add that he based most of his views on the findings of the Nongovernmental International Panel on Climate Change (NIPCC), an international body that says «because it is not a government agency, and because its members are not predisposed to believe climate change is caused by human greenhouse gas emissions, NIPCC is able to offer an independent «second opinion» of the evidence reviewed - or not reviewed - by the Intergovernmental Panel on Climate Change (IPCC) on the issue of global warming.»

Thus it is entirely unsurprising that these short - term effects all aligning in the cooling direction in recent years have offset much of the surface warming caused by human greenhouse gas emissions.

An overwhelming 97 % of scientists agree that climate change is being caused by human greenhouse gas emissions.

Because we are not predisposed to believe climate change is caused by human greenhouse gas emissions, we are able to look at evidence the Intergovernmental Panel on Climate Change (IPCC) ignores.

This suggests that the research community has a sound understanding of what the climate will be like as we move toward a Pliocene - like warmer future caused by human greenhouse gas emissions.»

Not exact matches

Those changes have been driven by human - caused greenhouse gas emissions, which are warming the world and causing Earth's climate to change faster than reefs can keep up.

The reason is that if climate change would not be human - caused, then humans would not be able to prevent it by scaling down their greenhouse gas emissions.

Since levels of greenhouse gases have continued to rise throughout the period, some skeptics have argued that the recent pattern undercuts the theory that global warming in the industrial era has been caused largely by human - made emissions from the burning of fossil fuels.

The scientists looked at the so - called biogenic fluxes or flow of the three greenhouse gases on land that were caused by human activities over the last three decades and subtracted out emissions that existed «naturally» during pre-industrial times.

Scientists can confidently say that Earth is warming due to greenhouse gas emissions caused by humans, but data on climate trends over the Antarctic and the surrounding Southern Ocean only go back to 1979 when regular satellite observations began.

The key conclusions were that: It is «unequivocal» that global warming is occurring; the probability that this is caused by natural climatic processes is less than 5 %; and the probability that this is caused by human emissions of greenhouse gases is over 90 %.

The first report concludes that global warming is happening, and is very likely caused by human emissions of greenhouse gases.

The effects of global warming are the ecological and social changes caused (directly or indirectly) by human emissions of greenhouse gases.

Those times were caused by large and rapid greenhouse gas emissions, just like humans are causing today.

But President Bush's announcement Wednesday of a plan to halt growth in U.S. greenhouse gas emissions by 2025, while not embracing all the enviro groups want, legitimizes their argument that global warming is caused by humans and an imminent threat to mankind.

Is the prevailing opinion that that upward trend is primarily caused by human emissions of greenhouse gases or am I looking at a natural phenomenon that humans are now adding to?

By the way, I'd just like to mention that I am far happier to be arguing about the comparative benefits of nuclear power, wind, solar, geothermal, biomass, conservation, efficiency, reforestation, organic agriculture, etc. for quickly reducing CO2 emissions and concentrations, than to be engaged in yet another argument with someone who doesn't believe that CO2 is a greenhouse gas, or that human activities are not causing warming, or that the Earth is cooling, or thinks that AGW is a «liberal» conspiracy to destroy capitalism, etc..

But temperatures are running so far ahead of those during the last strong El Niño, in 1997 and 1998, that scientists said the records would not be occurring without an underlying trend caused by human emissions of greenhouse gases.

In the entirely subjective opinion of a particular group of IPCC authors, it's «extremely likely» (95 % certain) that «more than half of the observed increase in global average surface temperature from 1951 to 2010» was caused by human - generated greenhouse gas emissions (see the bottom of p. 13 here).

Thus a grand solar minimum would have to cause about 1 °C cooling, plus it would have to offset the continued human - caused global warming between 1 and 5 °C by 2100, depending on how our greenhouse gas emissions change over the next century.

I intend both to «follow the money» (flowing primarily from special interests opposed to regulation or taxation of greenhouse gas emissions) and to «follow the science» (by exposing the most egregious flaws in the «evidence» against the attribution of contemporary climate change primarily to human causes).

If humans don't act to reduce their emissions of greenhouse gases, Gore contends, the deaths caused by climate change will double in 25 years to 300,000 people a year, and more than a million species worldwide could be driven to extinction in half a century.

But it is true that some of the fossil - fuel funded groups that formerly argued that there is no global warming have reacted to criticism by changing their argument to «the climate is always changing,» as if that somehow disproves the scientific consensus that human greenhouse - gas emissions are causing dangerous warming.

Those times were caused by large and rapid greenhouse gas emissions, just like humans are causing today.

This is the belief backed up by the scientific evidence; in the most recent report by the Intergovernmental Panel on Climate Change (IPCC) in September 2013, scientists agreed that it is «extremely likely» that human emissions of greenhouse gases are causing the planet to warm.

For instance, the long - term warming effects of CO2 and other greenhouse gases are largely buffered by the ocean, which absorbs more than 90 percent of the excess heat caused by human emissions of CO2 and other greenhouse gases.

When I look at a snowless street in January I may see a natural weather variation, or I may see a human artifact caused by greenhouse gas emissions.

Degradation of near - surface permafrost (perennially frozen ground) caused by modern climate change is adversely affecting human infrastructure, altering Arctic ecosystem structure and function, changing the surface energy balance, and has the potential to dramatically impact Arctic hydrological processes and increase greenhouse gas emissions.

The link between adverse impacts such as more wildfires, ecosystem changes, extreme weather events etc. and their mitigation by reducing greenhouse gas emissions hinges on detecting unusual events for at least the past century and then actually attributing them to human caused warming.

Climate change is occurring, is very likely caused primarily by the emission of greenhouse gases from human activities, and poses significant risks for a range of human and natural systems.

A linear warming trend plus natural cycles can be mistaken for a step function, but physically the global warming is caused by an external radiative forcing (i.e. human greenhouse gas emissions).

This is so because in addition to the theological reasons given by Pope Francis recently: (a) it is a problem mostly caused by some nations and people emitting high - levels of greenhouse gases (ghg) in one part of the world who are harming or threatening tens of millions of living people and countless numbers of future generations throughout the world who include some of the world's poorest people who have done little to cause the problem, (b) the harms to many of the world's most vulnerable victims of climate change are potentially catastrophic, (c) many people most at risk from climate change often can't protect themselves by petitioning their governments; their best hope is that those causing the problem will see that justice requires them to greatly lower their ghg emissions, (d) to protect the world's most vulnerable people nations must limit their ghg emissions to levels that constitute their fair share of safe global emissions, and, (e) climate change is preventing some people from enjoying the most basic human rights including rights to life and security among others.

This is so because: (a) it is a problem mostly caused by some nations and people emitting high - levels of greenhouse gases (ghg) in one part of the world who are harming or threatening tens of millions of living people and countless numbers of future generations throughout the world who include some of the world's poorest people who have done little to cause the problem, (b) the harms to many of the world's most vulnerable victims of climate change are potentially catastrophic, (c) many people most at risk from climate change often can't protect themselves by petitioning their governments; their best hope is that those causing the problem will see that justice requires them to greatly lower their ghg emissions, (d) to protect the world's most vulnerable people nations must limit their ghg emissions to levels that constitute their fair share of safe global emissions, and, (e) climate change is preventing some people from enjoying the most basic human rights including rights to life and security among others.

As a result, concrete production produces nearly 5 % of the global greenhouse - gas (GHG) emissions caused by human activity.

Many climate skeptics argue that the most likely scenario for global warming is that human emissions of CO2 and other greenhouse gases will cause mild warming, a geographic mixture of winners and losers, and what problems arise can be met by adaptation.

The first installment of the IPCC's Fifth Assessment Report confirms the overwhelming scientific consensus that the impacts of climate change are accelerating, and they're largely driven by human - caused greenhouse gas emissions.

The average land temperature on earth has risen 2.5 degrees Fahrenheit over the past 250 years — essentially all of it caused by human emission of greenhouses gases.

Over the past several centuries, human greenhouse gas emissions have caused by far the largest radiative forcing (energy imbalance), and thus must be the driver of any observed long - term global warming.

«Climate science» as it is used by warmists implies adherence to a set of beliefs: (1) Increasing greenhouse gas concentrations will warm the Earth's surface and atmosphere; (2) Human production of CO2 is producing significant increases in CO2 concentration; (3) The rate of rise of temperature in the 20th and 21st centuries is unprecedented compared to the rates of change of temperature in the previous two millennia and this can only be due to rising greenhouse gas concentrations; (4) The climate of the 19th century was ideal and may be taken as a standard to compare against any current climate; (5) global climate models, while still not perfect, are good enough to indicate that continued use of fossil fuels at projected rates in the 21st century will cause the CO2 concentration to rise to a high level by 2100 (possibly 700 to 900 ppm); (6) The global average temperature under this condition will rise more than 3 °C from the late 19th century ideal; (7) The negative impact on humanity of such a rise will be enormous; (8) The only alternative to such a disaster is to immediately and sharply reduce CO2 emissions (reducing emissions in 2050 by 80 % compared to today's rate) and continue further reductions after 2050; (9) Even with such draconian CO2 reductions, the CO2 concentration is likely to reach at least 450 to 500 ppm by 2100 resulting in significant damage to humanity; (10) Such reductions in CO2 emissions are technically feasible and economically affordable while providing adequate energy to a growing world population that is increasingly industrializing.

The US apparent unwillingness to reduce its greenhouse gas emissions beyond what it is already on track to achieve is of considerable controversy in the Qatar negotiations this week because of the growing scientific concern about the potential inevitability of catastrophic warming caused by human activities.

While it is generally accepted that the observed reduction of the Northern Hemisphere spring snow cover extent (SCE) is linked to warming of the climate system caused by human induced greenhouse gas emissions, it has been difficult to robustly quantify the anthropogenic contribution to the observed change.

The claim is often made that climate realists (a.k.a. skeptics) can not point to peer - reviewed papers to support their position that there is no evidence of «dangerous global warming:» caused by human emissions of so - called «greenhouse» gases, including carbon dioxide.

However, the amount of warming caused by human greenhouse gas (GHG) emissions is known to a high degree of certainty, and these same studies have all found that GHGs are responsible for over 100 % of the observed warming over this timeframe (Figure 3).

In a recent article, we call this anthropogenic drought, which is water stress caused or intensified by human activities, including increased demand, outdated water management, climate change from anthropogenic greenhouse gas emissions, growing energy and food production, intensive irrigation, diminished supplies, and land use change.

It is faithfully reported as 66 % of climate scientists practicing in the field who believe half or more of the current warming is caused by human emissions of greenhouse gases.

Others have argued that the records were caused by El Nino, a complex natural phenomenon that takes place every few years, and has nothing to do with greenhouse gas emissions by humans.