Sentences with phrase «observed warming of the climate»

Not exact matches

A large number of additional observations are broadly consistent with the observed warming and reflect a flow of heat from the atmosphere into other components of the climate system.

No model, however, has predicted the global warming hiatus which climate researchers have observed since the turn of the millennium.

While natural sources of climate variability are significant, multiple lines of evidence indicate that human influences have had an increasingly dominant effect on the climate warming observed since the mid-twentieth century.

Tippett notes that more studies are needed to attribute the observed changes to either global warming or another component of climate variability.

«Moreover, the latest developments in climate science lend greater urgency to the case for action: Effects on natural systems are already being observed and recent findings concerning the potential scope and magnitude of damages from future warming are increasingly worrisome,» the report says.

Now Muller says Berkeley Earth's new results «are stronger than those of the Intergovernmental Panel on Climate Change,» because they found solar activity had a «negligible» role in warming observed since the 1750s.

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.

On Wednesday, Dec. 17, at the American Geophysical Union's Fall Meeting in San Francisco, Noah Diffenbaugh, an associate professor of environmental Earth system science at the Stanford School of Earth Sciences, will discuss approaches to this challenge in a talk titled «Quantifying the Influence of Observed Global Warming on the Probability of Unprecedented Extreme Climate Events.»

Earlier spring leaf unfolding is a frequently observed response of plants to climate warming.

Model simulations of 20th century global warming typically use actual observed amounts of atmospheric carbon dioxide, together with other human (for example chloroflorocarbons or CFCs) and natural (solar brightness variations, volcanic eruptions,...) climate - forcing factors.

Therefore studies based on observed warming have underestimated climate sensitivity as they did not account for the greater response to aerosol forcing, and multiple lines of evidence are now consistent in showing that climate sensitivity is in fact very unlikely to be at the low end of the range in recent estimates.

On time - scales of a few decades, the current observed rate of warming can be used to constrain the projected response to a given emissions scenario despite uncertainty in climate sensitivity.

These predictions are limited by a poor understanding of the recent changes observed in the Antarctic and Greenland ice sheets, and a lack of knowledge about the variability of ice sheet behaviour under a warming climate.

«Despite being very warm, 2014 still leaves the observed warming in the lower part of the range of climate model simulations.»

Investigating the cause of 20th Century warming is properly done in detection and attribution studies, which analyze the various forcings (e.g., solar variations, greenhouse gases or volcanic activity) and the observed time and space patterns of climate change in detail.

However, satellite observations are notably cooler in the lower troposphere than predicted by climate models, and the research team in their paper acknowledge this, remarking: «One area of concern is that on average... simulations underestimate the observed lower stratospheric cooling and overestimate tropospheric warming... These differences must be due to some combination of errors in model forcings, model response errors, residual observational inhomogeneities, and an unusual manifestation of natural internal variability in the observations.»

Another way to estimate climate sensitivity from both models AND observations is to calculate the ratio of observed warming to forecast warming... then multiply that by the ECS value used in the model.

«The observed pattern of warming, comparing surface and atmospheric temperature trends, doesn't show the characteristic fingerprint associated with greenhouse warming,» wrote lead author David Douglas, a climate expert from the University of Rochester, in New York state.

Investigating the cause of 20th Century warming is properly done in detection and attribution studies, which analyze the various forcings (e.g., solar variations, greenhouse gases or volcanic activity) and the observed time and space patterns of climate change in detail.

Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia.

This is evident from the increasing greenhouse gas concentrations in the atmosphere, positive radiative forcing, observed warming, and understanding of the climate system.

These results suggest that sea surface temperature pattern - induced low cloud anomalies could have contributed to the period of reduced warming between 1998 and 2013, and offer a physical explanation of why climate sensitivities estimated from recently observed trends are probably biased low 4.

We show that observed global warming is consistent with knowledge of changing climate forcings, Earth's measured energy imbalance, and the canon - ical estimate of climate sensitivity, i.e., about 3 ◦ C global warming for doubled atmospheric CO2.

Investigating the cause of 20th Century warming is done in so - called detection and attribution studies, which analyze the various forcings (e.g., solar variations, greenhouse gases or volcanic activity) and the observed time and space patterns of climate change in detail.

The warming mentioned here is due to the fact that higher climate sensitivity is required to explain the observed warming in the presence of the sulphate cooling forcing).

Global warming is the observed century - scale rise in the average temperature of Earth's climate system.

For a start, based on what we know about the forcings and the observed evolution of global mean temperature, why would one expect climate change to be a linear warming since 1880 in Moscow?

Result: NS 2) «In reviewing the results, the IPCC report concluded: «No climate model using natural forcings [i.e., natural warming factors] alone has reproduced the observed global warming trend in the second half of the twentieth century.

In the most recent Third Assessment Report (2001), IPCC wrote «There is new and stronger evidence that most of the warming observed over the last 50 years is attributable to human activities» This section is trying to cast doubt on the IPCC report, one of the most comprehensive climate change studies.

Therefore studies based on observed warming have underestimated climate sensitivity as they did not account for the greater response to aerosol forcing, and multiple lines of evidence are now consistent in showing that climate sensitivity is in fact very unlikely to be at the low end of the range in recent estimates.

The observed CO2 increase in the world ocean disproves another popular #fakenews piece of the «climate skeptics»: namely that the CO2 increase in the atmosphere might have been caused by the outgassing of CO2 from the ocean as a result of the warming.

And in turn this warm surface water is left in greater control of the shorter time - scale climate which we have been able to observe during the instrumental period.

However, the observed energy imbalance at the top - of - atmosphere for this recent decade indicates that a net energy flux into the climate system of about 1 W m − 2 (refs 2, 3) should be producing warming somewhere in the system4, 5.

Here we analyze a series of climate model experiments along with observational data to show that the recent warming trend in Atlantic sea surface temperature and the corresponding trans - basin displacements of the main atmospheric pressure centers were key drivers of the observed Walker circulation intensification, eastern Pacific cooling, North American rainfall trends and western Pacific sea - level rise.

CAGW or Catastrophic Anthropogenic Global Warming is the acronym used (mostly by those that don't support taking immediate action on climate change) for the theory (or collection of hypotheses) that attribute most of the observed modern warming to human activities and warn that continuing similar activities (mostly emitting CO2) could result in warming that is dangerous to both civilization and a number of ecosWarming is the acronym used (mostly by those that don't support taking immediate action on climate change) for the theory (or collection of hypotheses) that attribute most of the observed modern warming to human activities and warn that continuing similar activities (mostly emitting CO2) could result in warming that is dangerous to both civilization and a number of ecoswarming to human activities and warn that continuing similar activities (mostly emitting CO2) could result in warming that is dangerous to both civilization and a number of ecoswarming that is dangerous to both civilization and a number of ecosystems.

DSCOVR was designed to directly measure climate change for the first time ever by observing our warming planet from the unique vantage of the Lagrange Point — one million miles towards the Sun.

We have fairly high confidence that we observe the history of Heinrich events (huge discharges of ice - rafted debris from the Laurentide ice sheet through Hudson Bay that are roughly coincident with large southern warming, southward shift of the intertropical convergence zone, extensive sea ice in the north Atlantic, reduced monsoonal rainfall in at least some parts of Asia, and other changes), and also cold phases of the Dansgaard / Oeschger oscillations that lack Heinrich layers and are characterized by muted versions of the other climate anomalies I just mentioned.

F. «The warming of the climate is consistent with observed increases in the number of daily warm extremes, reductions in the number of daily cold extremes and reductions in the number of frost days at mid-latitudes.

Greenhouse gases produced mainly by the burning of fossil fuels are altering the atmosphere in ways that affect earth's climate, and it is likely that they have «contributed substantially to the observed warming over the last 50 years,» an international panel of climate scientists has concluded.

As in other climate phenomena, there may be a multitude of factors responsible for the observed trends — but are Gray, Pielke, Klotzbach and Landsea really claiming that global warming has no effect on SSTs?

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 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 Climate Change in its Fourth Assessment Report;

a) atmospheric CO2 from human activity is a major bause of observed warming in the 1980's and 1990's, c) that warming is overstated due to a number of factors including solar effects and measurement skew d) the data going back 150 years is of little reliability because it is clustered so heavily in northeast america and western europe rather than being global e) the global climate has been significantly shifting over the last thousand years, over the last ten thousand years, and over the last hundred thousand years; atmospheric CO2 levels did not drive those changes, and some of them were rapid.

As noted above, most earlier hindcasts of 20th century climate as well as current IPCC AR4 runs [Miller et al., 2006; Knutson et al., 2006] do not reproduce the observed trends over recent decades in the AO component of the circulation, and thus do not capture the intensification of warming trends that has been observed over Northern Europe and Asia.

A new study co-authored by Francis Zwiers, the director of UVic's Pacific Climate Impacts Consortium, suggests that human - induced global warming may be responsible for the increases in heavy precipitation that have been observed over much of the Northern Hemisphere including North America and Eurasia over the past several decades.

Kosaka and Xie made global climate simulations in which they inserted specified observed Pacific Ocean temperatures; they found that the model simulated well the observed global warming slowdown or «hiatus,» although this experiment does not identify the cause of Pacific Ocean temperature trends.

Result: the temperature record we use to define climate contains a random mix of these records with distinctly different characteristics — the ones with 7PM observing time tend to produce warmer climate estimates, the ones with 7AM observing time tend to be colder.

«One of the most significant signals in the thermometer - observed temperature record since 1900 is the decrease in the diurnal temperature range over land, largely due to warming of the minimum temperatures... Climate models have in general not replicated the change in diurnal temperature range well.

'' -LSB-...][T] here is no substantive basis for predictions of sizeable global warming due to observed increases in minor greenhouse gases such as carbon dioxide, methane and chlorofluorocarbons,» Lindzen told a gathering at the Heartland Institute's International Conference on Climate Change.

Climate projections indicate that the likelihood of more severe droughts, such as the one we're observing, increases under global warming.

The science is clear to me and to most experts in the various fields associated with climate science: Humans are causing most of the observed global warming in the past several decades and, if we continue emitting GHGs under a «business as usual» scenario, it will become increasingly difficult and costly to adapt to the changes that are likely to occur.