Sentences with phrase «global human greenhouse gas»

The emissions scenarios included business as usual (BAU) and three other scenarios (B, C, D) in which global human greenhouse gas emissions began slowing in the year 2000.

Not exact matches

``... a number of scientific studies indicate that most global warming... is due to the great concentration of greenhouse gases released mainly as a result of human activity... these gases do not allow the warmth of the sun's rays reflected by the earth to be dispersed in space.

... A number of scientific studies indicate that most global warming in recent decades is due to the great concentration of greenhouse gases (carbon dioxide, methane, nitrogen oxides and others) released mainly as a result of human activity... Doomsday predictions can no longer be met with irony or disdain.

Most scientists and climatologists agree that weird weather is at least in part the result of global warming — a steady increase in the average temperature of the surface of the Earth thought to be caused by increased concentrations of greenhouse gasses produced by human activity.

In an about - face, the agency agreed that global warming is happening; that humans, by pumping greenhouse gases into the atmosphere, are responsible; and that the American environment is likely to change dramatically over the next century.

The ability of the oceans to take up carbon dioxide can not keep up with the rising levels of greenhouse gases in the atmosphere, which means carbon dioxide and global temperatures will continue to increase unless humans cut their carbon dioxide emissions.

The researchers [3] quantified China's current contribution to global «radiative forcing» (the imbalance, of human origin, of our planet's radiation budget), by differentiating between the contributions of long - life greenhouse gases, the ozone and its precursors, as well as aerosols.

Although a wide variety of greenhouse gases contribute to human - caused global warming, it is CO2, largely alone, that will determine the long - term climate, Solomon says.

Of course, modern global warming stems from a clear cause — rising levels of CO2 (and other greenhouse gases) from fossil fuel burning, cutting down forests and other human activities.

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.

«Many impacts respond directly to changes in global temperature, regardless of the sensitivity of the planet to human emissions of CO2 and other greenhouse gases,» says geoscientist Katharine Hayhoe of Texas Tech University in Lubbock, a co-author of the report, excluding effects such as ocean acidification and CO2 as a fertilizer for plants.

The researchers looked at a total of 34 different global climate model outputs, encompassing different degrees of atmospheric sensitivity to greenhouse gases and different levels of human emissions of greenhouse gases into the atmosphere.

Global warming became big news for the first time during the hot summer of 1988 when now - retired NASA climate scientist James Hansen testified before Congress that the trend was not part of natural climate variation, but rather the result of emissions of CO2 and other greenhouse gasses from human activities.

Kyoto regulates all sources of carbon dioxide as well as other greenhouse gases, but reliable long - term data by country are available only for carbon dioxide from burning fossil fuels (which accounts for about two - thirds of the human contribution to global warming).

«I agree that carbon dioxide is a greenhouse gas, that greenhouse gas concentrations in the atmosphere are increasing as a result of human activities — primarily burning coal, oil, and natural gas — and that this means the global mean temperature is likely to rise,» Ebell said in the statement released by CEI yesterday.

Geographer Carol Harden, the editor of the journal, Physical Geography, was aware that Soon was a vociferous critic of the idea that humans were causing global warming and of proposals for the U.S. government to regulate greenhouse gas emissions.

«It is true that there are other factors (such as volcanism, the changes in the orbit and the axis of the Earth, the solar cycle), but numerous scientific studies indicate that most of the global warming in recent decades is due to the large concentration of greenhouse gases (carbon dioxide, methane, nitrogen oxide and others) mainly emitted due to human activity.»

Global warming is the rise in temperatures caused by an increase in the levels of greenhouse gases due to human activity.

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.

To have any hope of slowing the pace and holding down the upper level temperatures that global warming will bring over this century, the human population of the world will need to make large reductions of the additional billions of tons of greenhouse gases they are projected to be pumping into the atmosphere, each year.

While El Niño played a role in bumping up global temperatures during 2015 and 2016, the bulk of the warmth was due to the excess heat trapped by greenhouse gases emitted by humans over the past century, particularly carbon dioxide.

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.

However, at the increased levels seen since the Industrial Revolution (roughly 275 ppm then, 400 ppm now; Figure 2 - 1), greenhouse gases are contributing to the rapid rise of our global average temperatures by trapping more heat, often referred to as human - caused climate change.

The past century has seen a 0.8 °C increase in average global temperature, and according to the IPCC, the overwhelming source of this increase has been emissions of greenhouse gases and other pollutants from human activities.

Petrenko's most recent research focuses on methane, a powerful greenhouse gas second only to carbon dioxide in its contribution to human - driven global warming.

Known as a «co-benefit,» using state of the art models for human and natural systems, along with climate projections from the international community, the team was able for the first time to put a value on the global air pollution benefits of cutting greenhouse gas emissions over the 21st century.

Human behavioral changes, such as installing solar panels or investing in public transportation, alter greenhouse gas emissions, which change the global temperature and thus the frequency of extreme events, leading to new behaviors, and the cycle continues.

Methods: The team used new relationships between chronic mortality and exposure to fine particulates and ozone, global modeling methods and new future climate scenarios to simulate the co-benefits of global greenhouse gas reductions on air quality and human health.

For example, the report summarizes recent research underpinning the scientific rationale for large and rapid reductions in global greenhouse gas emissions, in order to reduce the likelihood of dangerous human - induced climate change.

The warm waters across the central and eastern tropical Pacific are boosting global temperatures, which is on top of the long - term warming driven by human greenhouse gas emissions.

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

Global climate models are the scientific community's best tools for understanding the detailed dynamics of the global climate system and the way those dynamics change in response to greenhouse gas emissions and other human activGlobal climate models are the scientific community's best tools for understanding the detailed dynamics of the global climate system and the way those dynamics change in response to greenhouse gas emissions and other human activglobal climate system and the way those dynamics change in response to greenhouse gas emissions and other human activities.

But the annual amount of human - caused global emissions of carbon dioxide, the main greenhouse gas driving climate change, is now about 50 percent larger than in 1992.

[2] According to the Intergovernmental Panel on Climate Change (IPCC), most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in human greenhouse gas concentrations.

The assessment examines the following content; global warming, the greenhouse effect / gases, natural and human causes of past climate change, evidence of the little ice age, features of tropical storms and the effects and response to tropical storms.

Res — math.ku.dk ``... Evidence is mounting that changes in global surface temperature can be attributed to human activities that increase the atmospheric concentration of greenhouse gases and tropospheric sulfates [Sanier et al, 1996a, 1996b].

To have any hope of slowing the pace and holding down the upper level temperatures that global warming will bring over this century, the human population of the world will need to make large reductions of the additional billions of tons of greenhouse gases they are projected to be pumping into the atmosphere, each year.

Human activities are releasing greenhouse gases more than 30 times faster than the rate of emissions that triggered a period of extreme global warming in the Earth's past, according to an expert on ancient climates.

Unfortunately for policymakers and the public, while the basic science pointing to a rising human influence on climate is clear, many of the most important questions will remain surrounded by deep complexity and uncertainty for a long time to come: the pace at which seas will rise, the extent of warming from a certain buildup of greenhouse gases (climate sensitivity), the impact on hurricanes, the particular effects in particular places (what global warming means for Addis Ababa or Atlanta).

First, they have not come up with any plausible alternative culprit for the disruption of global climate that is being observed, for example, a culprit other than the greenhouse - gas buildups in the atmosphere that have been measured and tied beyond doubt to human activities.

Mr. McCain has been an interesting voice on global warming, given that he broke with President Bush and most of his party years ago, acknowledging that the buildup of greenhouse gases from human activities was risky and mandatory steps were needed to curb emissions.

A task force assembled by the American Psychological Association hopes to spur more research on the role of the human mind in shaping the behaviors resulting in rising greenhouse - gas emissions as well as on traits that can impede an effective response to global warming and similar slow - building environmental risks.

It is predicated on observations and established science — that CO2 is a greenhouse gas, that humans are increasing CO2 in the atmosphere and that doubling CO2 will raise global temperatures by about 3 degrees.

Item 8 could be confusing in having so many messages: «It is extremely likely that more than half of the observed increase in global average surface temperature from 1951 to 2010 was caused by the anthropogenic increase in greenhouse gas... The best estimate of the human - induced contribution to warming is similar to the observed warming over this period....

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.

The basics of global warming science remain robust — more greenhouse gases will continue to heat the planet, erode ice, raise seas and present challenges to many human and ecological communities.

* The role of the US in global efforts to address pollutants that are broadly dispersed across national borders, such as greenhouse gasses, persistent organic pollutants, ozone, etc...; * How they view a president's ability to influence national science policy in a way that will persist beyond their term (s), as would be necessary for example to address global climate change or enhancement of science education nationwide; * Their perspective on the relative roles that scientific knowledge, ethics, economics, and faith should play in resolving debates over embryonic stem cell research, evolution education, human population growth, etc... * What specific steps they would take to prevent the introduction of political or economic bias in the dissemination and use of scientific knowledge; * (and many more...)

There is a lively debate in climate science about how best to compare the importance of these greenhouse gases, and many climatologists deeply immersed in studying human - driven global warming reject the method used by Howarth.

Yes, like global warming, we emited too much greenhouse gas into atmospere then nature happened many bad phonominon: glaceris, sea ice melting, bees died and so on to punish our human.