Such activities produce two
other main greenhouse gases: methane and nitrous oxide.
(
The other main greenhouse gas, methane, was soaring even farther above any level seen in the long ice record.)
Not exact matches
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.
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.
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.
«Due to its large volume and surface area, the biogeochemical processes in the ocean are the
main control on the levels of CO2 and
other greenhouse gases in the atmosphere,» Buchanan said.
The three
main sections describe planned regulations, rules and standards aimed at cutting releases of carbon dioxide and
other greenhouse gases from power plants, heavy vehicles and buildings; a suite of new steps to cut vulnerability to climate and coastal hazards; and a fresh summary of international initiatives the administration plans to pursue with
other countries.
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.
The Intergovernmental Panel on Climate Change (big pdf file) and
other climate - research groups have largely rejected the hypothesis that variations in the sun's behavior could have played a big role in warming since 1950 (the period in which the panel and the vast majority of climate specialists see abundant evidence that a human - caused buildup of
greenhouse gases is the
main influence).
Others include, the role of the Sun (being the
main heat source), the vast oceans which cover over 70 % of the Earth's surface (and the natural factors which determine the storage and release of CO2 back into the atmosphere), water - vapour being the dominant
greenhouse gas comprising 98 % of the atmosphere, the important role of low - level clouds which is thought to be a major factor in determining the natural variation of climate temperatures (P.S. Significantly, computer - models are unable to replicate cloud - formation and coverage — which again — injects bias into model).
The value at the end of Barack Obama's presidency was set at roughly $ 40 for each ton of carbon dioxide, the
main greenhouse gas emitted by human activities, or equivalent amounts of
other gases such as methane.
There are also growing concerns about trends for some
other greenhouse gases — in particular, the second most - important man - made planet warmer, methane, the
main constituent of natural
gas.
In fact, atmospheric CO2 concentrations differ by less than 3 parts per million in 2010 between his Scenarios A and B. No, the
main difference between the scenarios involves the
other greenhouse gases, primarily chlorofluorocarbons (CFCs).
Tim Lambert links to this article by Eric Pooley in Slate's The Big Moneye which points out that, for all the disagreement among economists regarding the details of climate change policy, there is substantial consensus on the following
main points (i) the cost of action to stabilise atmospheric concentrations of CO2 and
other greenhouse gases will be of the order of 1 per cent of GDP (ii) a strong mitigation policy is preferable to business as usual
The report from the JRC also shows that emissions of the two
other main heat - trapping
greenhouse gases, methane and nitrous oxide, continued to increase in 2016.
E.g., research assumes
greenhouse gas emissions cause warming without explicitly stating humans are the cause»... carbon sequestration in soil is important for mitigating global climate change» (4a) No position Does not address or mention the cause of global warming (4b) Uncertain Expresses position that human's role on recent global warming is uncertain / undefined «While the extent of human - induced global warming is inconclusive...» (5) Implicit rejection Implies humans have had a minimal impact on global warming without saying so explicitly E.g., proposing a natural mechanism is the
main cause of global warming»... anywhere from a major portion to all of the warming of the 20th century could plausibly result from natural causes according to these results» (6) Explicit rejection without quantification Explicitly minimizes or rejects that humans are causing global warming»... the global temperature record provides little support for the catastrophic view of the
greenhouse effect» (7) Explicit rejection with quantification Explicitly states that humans are causing less than half of global warming «The human contribution to the CO2 content in the atmosphere and the increase in temperature is negligible in comparison with
other sources of carbon dioxide emission»»
Tyndall's
main interest was with water vapour and its impact on radiation, but he also dealt with the radiative forcing of
other greenhouse gases including carbon dioxide.
IMHO if the technology can be used safely, economically and effectively to reduce
greenhouse gas emissions then those promoting the technology should be able to make their case in comparison to
other mitigation strategies, but people whose
main bag is promoting nuclear above everything else (including excepting the AGW theory) strike me as high suspect.