Also risen have
other warming gases like methane.
Meanwhile, most researchers believe that ever warmer years will become routine as humans pump more carbon dioxide and
other warming gases into the atmosphere.
Not exact matches
But methane
gas, which is produced by, among
other things, rotting garbage in the nation's landfills, is 22 times more potent a contributor to global
warming.
Weather patterns have changed because of the elevated levels of carbon, methane and
other gasses in our atmosphere (which has become
warmer and dryer).
I am not sure that the evidence for global
warming is totally convincing or that its connection to our production of greenhouse
gases, deforestation, or
other forms of pollution of our world is firmly demonstrable.
... 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.
Global
warming, greenhouse
gases and carbon footprint have become household terms, and consumer groups, government agencies, and businesses are working on ways to preserve the land, air, water and
other natural resources.
Temperatures will probably keep smashing records as carbon dioxide, methane and
other gases continue
warming the planet.
Headed toward an 8 F rise in
warming Other such low - probability but high - risk scenarios mentioned in the report include ecosystem collapses, destabilization of methane stored in the seafloor and rapid greenhouse
gas emissions from thawing Arctic permafrost.
It remains too soon to tell exactly how this climate system will work under changed conditions and
other environmental factors — such as whether the cooling effect of the soot generated by industry and burning forests outweighs the
warming effect of greenhouse
gases — which may play large roles.
Scientists can measure how much energy greenhouse
gases now add (roughly three watts per square meter), but what eludes precise definition is how much
other factors — the response of clouds to
warming, the cooling role of aerosols, the heat and
gas absorbed by oceans, human transformation of the landscape, even the natural variability of solar strength — diminish or strengthen that effect.
Jacobson said the sum of
warming caused by all anthropogenic greenhouse
gases — CO2, methane, nitrous oxide, chlorofluorocarbons and some
others — plus the
warming caused by black and brown carbon will yield a planetary
warming effect of 2 degrees Celsius over the 20 - year period simulated by the computer.
So this effect could either be the result of natural variability in Earth's climate, or yet another effect of carbon dioxide and
other greenhouse
gases like water vapor trapping more heat and thus
warming sea - surface temperatures.
A short list of relatively simple actions taken to reduce greenhouse
gases other than CO2 could help put the brakes on global
warming — if implemented globally
Reducing the emissions of the greenhouse
gases that cause global
warming makes the most sense in the context of planetary boundaries, and many of the
other thresholds collapse into it, Blomqvist and his colleagues note.
The work complements
other recent studies showing that greenhouse
gas warming will shift plant ecosystems toward weedy plants, says Robert Jackson of Duke University in Durham, North Carolina, who has done similar work with natural grasslands.
Logically, say Howarth and
other researchers interested in how much methane leaks to the atmosphere, a higher lost and unaccounted for percentage would mean more
gas is escaping the system and
warming the planet.
In signing the 2015 Paris agreement, the United States, along with 194
other countries, pledged to curb greenhouse
gas emissions to combat global
warming.
An Australian wildfire has killed at least 135 people, and some experts are blaming global
warming caused by greenhouse
gas emissions for this and
other recent blazes.
While a strong El Niño provided a boost to global temperatures last year, the main driver of the planet's temperature surge, as well as
other climate trends, is the
warming caused by the buildup of greenhouse
gases in the atmosphere.
Forster's chapter also reports on another important uncertainty: the cooling effect of smoke and
other aerosols, which some argued almost negated the
warming effect of greenhouse
gases in the short term.
In a paper published this month in Geophysical Research Letters, Lovejoy concludes that a natural cooling fluctuation during this period largely masked the
warming effects of a continued increase in human - made emissions of carbon dioxide and
other greenhouse
gases.
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.
A few of the main points of the third assessment report issued in 2001 include: An increasing body of observations gives a collective picture of a
warming world and
other changes in the climate system; emissions of greenhouse
gases and aerosols due to human activities continue to alter the atmosphere in ways that are expected to affect the climate; confidence in the ability of models to project future climate has increased; and there is new and stronger evidence that most of the
warming observed over the last 50 years is attributable to human activities.
The research suggests that — contrary to some prior findings — CO2 led the prior round of global
warming rather than vice versa, just as it continues to do today thanks to rising emissions of CO2 and
other greenhouse
gases.
The 700 - degree Fahrenheit (370 - degree Celsius) fumes left over contain at least 30,000 parts per million of carbon dioxide (CO2)-- the primary greenhouse
gas responsible for global
warming — along with
other pollutants.
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.
Critics argue that albedo modification and
other «geoengineering» schemes are risky and would discourage nations from trying to reduce their emissions of carbon dioxide, the heat - trapping
gas that comes from the burning of fossil fuels and that is causing global
warming by absorbing increasing amounts of energy from sunlight.
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).
«If we can partition how much is from cows, natural
gas, and
other sources, we can more reliably strategize what to do about global
warming.»
On the
other hand, statistical analysis of the past century's hurricanes and computer modeling of a
warmer climate, nudged along by greenhouse
gases, does indicate that rising ocean temperatures could fuel hurricanes that are more intense.
Other geoengineering studies have examined how greenhouse
gas warming could be counteracted by making Earth's atmosphere more reflective.
Together, the
other greenhouse
gases account for roughly a third of the molecules trapping heat in the atmosphere — and more than a third of the overall
warming of average temperatures globally.
The technique seeks to inject sulfur into the atmosphere to reflect sunlight and offset the
warming caused by carbon dioxide and
other greenhouse
gases.
«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.»
«You have scenarios assuming very strong decisions, very quick and sharp reduction of greenhouse
gases, and you have
other scenarios with business as usual, where you end up with predictions of additional
warming of 5, 6 degrees, maybe even more.
India, China and many
other countries are poised to rely more heavily on natural
gas, which has less than half the
warming emissions of coal.
By analyzing global water vapor and temperature satellite data for the lower atmosphere, Texas A&M University atmospheric scientist Andrew Dessler and his colleagues found that
warming driven by carbon dioxide and
other gases allowed the air to hold more moisture, increasing the amount of water vapor in the atmosphere.
A: Global
warming occurs when carbon dioxide (CO2) and
other air pollutants and greenhouse
gases collect in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth's surface.
Indeed, the observed
warming during the 20th century can not be explained
other than by assuming that the models are reasonably accurate in their response to greenhouse
gases.
But our main point does not depend on that and is robust: with any model and any reasonable data - derived forcing, the observed 20th Century
warming trend can only be explained by anthropogenic greenhouse
gases, while
other factors can explain the shorter - term variations around this trend.
While a strong El Niño has given global temperatures a boost, the bulk of that heat comes from the manmade global
warming driven by increasing amounts of carbon dioxide and
other greenhouse
gases in the atmosphere.
From about 1940 to 1970 the increasing industrialisation following World War II increased pollution in the Northern Hemisphere, contributing to cooling, and increases in carbon dioxide and
other greenhouse
gases dominate the observed
warming after the mid-1970s.
All the models I've seen rely on the assumption that an increase in atmospheric greenhouse
gases will necessarily increase the long - term average temperature of the globe and that all the
other mechanisms that cause or counteract
warming are understood and modeled fairly accurately.
In
other words, global
warming is an indirect consequence of anthropogenic greenhouse
gases.
But even La Nina years now are
warmer than El Niño years several decades ago because of the long - term
warming caused by carbon dioxide and
other heat - trapping
gases emitted into the atmosphere.
I'm not saying that greenhouse
gases isn't a player, but I'd like the IPCC and the climate community to work towards understanding the
other potential causes of
warming, before jumping to conclusions on the impact of greenhouse
gases.
Previous studies had shown that the Milky Way and
other galaxies are embedded in
warm gas with temperatures between 100,000 and 1 million kelvins.
Others argue that global
warming brought on by the increased production of greenhouse
gasses will lead to larger hurricane zones and more powerful storms.
Remember that direct greenhouse effect from CO2 is quite small; the predictions rely on positive feedback from
other effects (particularly water vapour feedbacks, a far more significant greenhouse
gas) to cause substantial
warming.