Sentences with phrase «anthropogenic increase of greenhouse gases»

The problem at this point is to determine which of the many characteristics of climate change they are indicating, and to what extent these changes can be attributed to the train of events set in motion by anthropogenic increase of greenhouse gases.

With regards the Arctic: As Gillett et al and Johanessen et al show — in models without the anthropogenic increase of greenhouse gasses the Arctic warming does not occur, add the GHG effect and the warming occurs in all ensembles.

Not exact matches

They found that anthropogenic greenhouse gas emissions increased the risk of the once - a-century wet January in 2014 by 43 % (uncertainty range: 0 - 160 %).

(«Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.»)

Our general circulation model simulations, which take into account the recently observed widespread occurrence of vertically extended atmospheric brown clouds over the Indian Ocean and Asia3, suggest that atmospheric brown clouds contribute as much as the recent increase in anthropogenic greenhouse gases to regional lower atmospheric warming trends.

Current state - of - the - art climate models predict that increasing water vapor concentrations in warmer air will amplify the greenhouse effect created by anthropogenic greenhouse gases while maintaining nearly constant relative humidity.

Moreover, anthropogenic forcing from increased greenhouse gases might outweigh orbital forcing for as long as intensive use of fossil fuels continues [9].

Lastly, the third experiment asks this specific question: Did anthropogenic greenhouse gases increase the probability of major bark beetle outbreaks in western North America during the first decade of the 21st century?

... Most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.

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 concentrations and other anthropogenic forcings together.

AR4: Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.

AR5: 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 concentrations and other anthropogenic forcings together.

Given that the trend in global SSTs has been attributed to increases in greenhouse gases in the atmosphere (17 — 19), it follows that the best explanation for this ecosystem aberration is anthropogenic warming that has passed a threshold of natural variability.

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....

The precise magnitude of the anthropogenic contribution remains uncertain, but in nine out of ten cases our model results indicate that twentieth - century anthropogenic greenhouse gas emissions increased the risk of floods occurring in England and Wales in autumn 2000 by more than 20 %, and in two out of three cases by more than 90 %.

There are very few publishing scientists that do not endorse the IPCC (2007) conclusions that most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.

Some of them are optimal fingerprint detection studies (estimating the magnitude of fingerprints for different external forcing factors in observations, and determining how likely such patterns could have occurred in observations by chance, and how likely they could be confused with climate response to other influences, using a statistically optimal metric), some of them use simpler methods, such as comparisons between data and climate model simulations with and without greenhouse gas increases / anthropogenic forcing, and some are even based only on observations.

But that's just it, Paul, within the scientific community anthropogenic causation of increasing greenhouse gases, greenhouse gas - induced warming, and potential climate effects and impacts of increased warming are accepted science.

In Part I we outlined some general features of the tropical circulation, and discussed ways in which increases in anthropogenic greenhouse gases might affect El Niño.

In a paper that recently appeared in Nature, Vecchi, Soden, Wittenberg, Held, Leetmaa and Harrison present intriguing new results which suggest that there has already been a weakening of the Walker circulation in the past century, and that the observed changes are consistent with those expected as a response to increases in anthropogenic greenhouse gases.

The receding and thinning of Himalayan glaciers can be attributed primarily to the global warming due to increase in anthropogenic emission of greenhouse gases.

In 2001 it was claimed «there is new and stronger evidence that most of the warming observed over the last 50 years is attributable to human activities» and the current report concludes says it is: «90 % probable» that the recent warming is «due to the observed increase in anthropogenic greenhouse gas concentrations».

Recognizes that warming of the climate system is unequivocal and that most of the observed increase in global average temperatures since the mid twentieth century is very likely due to the increase in anthropogenic greenhouse gas concentrations, as assessed by the Intergovernmental Panel for Climate Change in its Fourth Assessment Report;

This intensification has resulted in significantly greater global summer monsoon rainfall in the Northern Hemisphere than predicted from greenhouse - gas - induced warming alone: namely a 9.5 % increase, compared to the anthropogenic predicted contribution of 2.6 % per degree of global warming.

Anthropogenic greenhouse gases have significantly increased the probability of heavy precipitation and local flood risk, report two papers in Nature this week.

Anthropogenic global warming (AGW), a recent warming of the Earth's lower atmosphere as evidenced by the global mean temperature anomaly trend [11], is BELIEVED to be the result of an «enhanced greenhouse effect» mainly due to human - produced increased concentrations of greenhouse gases in the atmosphere [12] and changes in the use of land [13].

This increase is more than double the IPCC's estimated radiative forcing from all anthropogenic emissions of greenhouse gases.

In 2013, the Intergovernmental Panel on Climate Change Fifth Assessment Report stated a clear expert consensus that: «It is extremely likely [defined as 95 - 100 % certainty] that more than half of the observed increase in global average surface temperature from 1951 to 2010 was caused by the anthropogenic [human - caused] increase in greenhouse gas concentrations and other anthropogenic forcings together.»

Our general circulation model simulations, which take into account the recently observed widespread occurrence of vertically extended atmospheric brown clouds over the Indian Ocean and Asia, suggest that atmospheric brown clouds contribute as much as the recent increase in anthropogenic greenhouse gases to regional lower atmospheric warming trends.

The statement is compatible with what the IPCC say - «Most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations».

One driver of temperatures in this region is the abundance and variability of ozone, but water vapor, volcanic aerosols, and dynamical changes such as the Quasi - Biennial Oscillation (QBO) are also significant; anthropogenic increases in other greenhouse gases such as carbon dioxide play a lesser but significant role in the lower stratosphere.

The statement in IPCC with which you take issue was «Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations» so it's not 20 years either.

This is the portion of temperature change that is imposed on the ocean - atmosphere - land system from the outside and it includes contributions from anthropogenic increases in greenhouse gasses, aerosols, and land - use change as well as changes in solar radiation and volcanic aerosols.

Hanoi, Viet Nam, 26 February 2018 — In his welcome remarks to participants of the Technology Needs Assessment (TNA) workshop, APN Secretariat Director, Mr. Seiji Tsutsui underscored that «Southeast Asia is a natural disaster - prone region, and it is predicted that disasters such as floods, typhoons, high - tides and landslides will be more extreme because of the increase in anthropogenic greenhouse gas emissions and increasing population concentration in urban areas.»

This paper examines in detail the statement in the 2007 IPCC Fourth Assessment Report that «Most of the observed increase in global average temperatures since the mid-twentieth century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations».

The IPCC statement that most of the observed increase in global average temperature since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations» is very much dependent on what weighting was given to natural (mainly solar) forcing over this period.

These conclusions are contrary to the IPCC [2007] statement: «[M] ost of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.

Thus: Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.

``... warming of the climate system is unequivocal... most of the global average warming over the past 50 years is very likely due to anthropogenic greenhouse gases increases...» — Rajendra Pachauri, Chairman of the IPCC, Nobel Prize acceptance speech, Dec. 10, 2007

This backs up the IPCC attribution statement «It is extremely likely [95 percent confidence] 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 concentrations and other anthropogenic forcings together.»

Again IPCC attribution statement: «It is extremely likely [95 percent confidence] 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 concentrations and other anthropogenic forcings together.»

One of the problems with the EPA's Endangerment TSD is the nearly complete disregard of observed trends in a wide array of measures which by and large show that despite decades of increasing anthropogenic greenhouse gas emissions the U.S. population does not seem to have been adversely affected by any vulnerabilities, risks, and impacts that may have arisen (to the extent that any at all have actually occurred as the result of any human - induced climate changes).

Judith, re your issue «Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.»

As professional scientists, from students to senior professors, we uphold the findings of the IPCC Fourth Assessment Report, which concludes that «Warming of the climate system is unequivocal» and that «Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations».

Mike: Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations.»

Results of the detection and attribution analysis shows that these declines are attributable to the anthropogenic forcing, which is dominated by the effect of increases in greenhouse gas concentration, and that they are not caused by natural forcing due to volcanic activity and solar variability combined.

Scientists keep track of natural forcings, but the observed warming of the planet over the second half of the 20th century can only be explained by adding in anthropogenic radiative forcings, namely increases in greenhouse gases such as carbon dioxide.

In addition, he discussed the increase of atmospheric greenhouse gas concentrations and the consequent anthropogenic warming of the climate system, decrease in sea ice and increase in ocean acidity.

To suggest that because near surface temperatures have flattened at or near the highest on record requires «abandoning» a sinking ship is to be grossly underinformed about the full scope and scale of the multiple changes going on and the confidence that anthropogenic climate continues unabated as it will so long as humans continue to increase greenhouse gas concentrations.

In times when the oceans are warming, there could be several factors that influence this, each with varying contributions based on natural and / or anthropogenic variability: 1) Greater solar output 2) Less aerosols in the atmosphere 3) Less cloudiness (especially of a certain type) 4) Increased greenhouse gases