Sentences with phrase «climate models and observations»

This is because imperfections in climate models and observations are still obscurring the climate change signal in some places, even despite technical advances and a satellite record that spans over more than 30 years.

While identifying the human contribution to such changes remains highly challenging — even using state - of - the - art climate models and observations, progress is still possible and, indeed, of critical importance.

Until a continuous climate observing system is established, both climate models and observations will remain uncertain.

Of the diagrams, I like Ed Hawkins diagram the best: it does a good job of lining up the climate models and observations in a sensible way from 1960 - 1990, so as to show the growing discrepancy between models and observations over the last decade.

The discrepancy between the climate models and the observations raised serious questions about the climate models.

For evidence of human influence on climate, the IPCC relies on a supposed agreement between climate models and observations.

However, isn't the mismatch between climate models and observations at the stage where we can say that it is probably the models?

Figure 7: This comparison of tropospheric temperatures shows a divergence between climate models and observations.

Judith said: «The issue is the growing discrepancy between the climate models and observations.»

The issue is the growing discrepancy between the climate models and observations, and the claim by Santer and others that under conditions of AGW, that any period of no warming or cooling beyond 17 years is very unlikely.

Updated, 3:10 p.m. Using climate models and observations, a fascinating study in this week's issue of Nature Climate Change points to a marked recent warming of the Atlantic Ocean as a powerful shaper of a host of notable changes in climate and ocean patterns in the last couple of decades — including Pacific wind, sea level and ocean patterns, the decade - plus hiatus in global warming and even California's deepening drought.

It's something of an abstract concept, but with real world implications, and the universality of such physical models, based on things like radiative balance, atmospheric composition and density, distance from the local Sun, etc., is a very strong argument in favor of general acceptance of the results of climate models and observations on Earth.

In addition, climate models and observations suggest that there may be modes of variability which act on multi-decadal timescales, although understanding of such modes is currently limited3.

The workshop, building on the knowledge and practical skills acquired during the school, aims to bring together expertise on large - scale atmospheric and oceanic dynamics, small scale cloud and precipitation processes, hierarchical climate modeling and observation.

Not exact matches

Previous research has suggested a connection between coal - burning and the Sahel drought, but this was the first study that used decades of historical observations to find that this drought was part of a global shift in tropical rainfall, and then used multiple climate models to determine why.

Combining observations from satellites and ground stations with climate models, they evaluated different factors that affect telescope vision, such as the amount of water vapour, wind speeds and atmospheric turbulence.

Nadeau also studies the potential impacts of climate change on species around the globe, using modeling, field observation and experiments to predict where species are most vulnerable and determine how conservation groups can best mitigate the negative impacts of climate change on animal populations.

Mission leaders were relieved and eager to begin their studies of cloud and haze effects, which «constitute the largest uncertainties in our models of future climate — that's no exaggeration,» says Jens Redemann, an atmospheric scientist at NASA's Ames Research Center in Mountain View, California, and the principal investigator for ObseRvations of Aerosols above CLouds and their IntEractionS (ORACLES).

The approach proposed in the paper combines information from observation - based data, general circulation models (GCMs) and regional climate models (RCMs).

«Advances in global climate models and high quality ocean, atmospheric and land observations are helping us push the frontiers of snowpack prediction.»

«Prior analyses have found that climate models underestimate the observed rate of tropical widening, leading to questions on possible model deficiencies, possible errors in the observations, and lack of confidence in future projections,» said Robert J. Allen, an assistant professor of climatology in UC Riverside's Department of Earth Sciences, who led the study.

The findings, published in the May 16 issue of Science, closely match observations in the atmosphere and can help make climate prediction models more accurate.

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.

«Most climate models that incorporate vegetation are built on short - term observations, for example of photosynthesis, but they are used to predict long - term events,» said Bond - Lamberty, who works at the Joint Global Change Research Institute, a collaboration between PNNL and the University of Maryland in College Park, Md. «We need to understand forests in the long term, but forests change slowly and researchers don't live that long.»

A more detailed investigation of the satellite observations and climate models helped the researchers finally reconcile what was happening globally versus locally.

Using published data from the circumpolar arctic, their own new field observations of Siberian permafrost and thermokarsts, radiocarbon dating, atmospheric modeling, and spatial analyses, the research team studied how thawing permafrost is affecting climate change and greenhouse gas emissions.

Using global climate models and NASA satellite observations of Earth's energy budget from the last 15 years, the study finds that a warming Earth is able to restore its temperature equilibrium through complex and seemingly paradoxical changes in the atmosphere and the way radiative heat is transported.

Observations and the high - resolution climate model CM2.6 show a strong relationship between a weakening Atlantic Meridional Overturning Circulation (AMOC) and an increase in the proportion of warm - temperate slope water entering the U.S. Northeast Continental Shelf, primarily through the Gulf of Maine's Northeast Channel.

Likewise, while models can not represent the climate system perfectly (thus the uncertainly in how much the Earth will warm for a given amount of emissions), climate simulations are checked and re-checked against real - world observations and are an established tool in understanding the atmosphere.

The method is based on Approximate Bayesian Computation (ABC), which is a machine learning method that has been developed to infer very complex models from observations, with uses in climate sciences and epidemiology among others.

To get around the problem, Fasullo and Trenberth decided to examine how well 16 global climate models reproduce recent satellite observations of relative humidity in the tropics and subtropics, a quantity that is directly related to cloud formation.

Wiedinmyer also wants to put her estimates into models of climate and air movement and see if they match up with current air observations.

The UM Rosenstiel School researchers used historical observations of cloud cover as a proxy for wind velocity in climate models to analyze the Walker circulation, the atmospheric air flow and heat distribution in the tropic Pacific region that affects patterns of tropical rainfall.

For the study, Mahony and co-author Alex Cannon from Environment and Climate Change Canada looked at historical observations going back to 1901 and global climate model projections to the yeaClimate Change Canada looked at historical observations going back to 1901 and global climate model projections to the yeaclimate model projections to the year 2100.

To check their model forecast, as the dry season has gotten underway, the researchers have compared their initial forecast with observations coming in from NASA's precipitation satellite missions» multisatellite datasets, as well as groundwater data from the joint NASA / German Aerospace Center Gravity Recovery and Climate Experiment (GRACE) mission.

But Spracklen's study suggests both the climate model projections and the observations may be correct.

In February, Australian and American researchers who compared ocean and climate modeling results with weather observations published findings in Nature Climate Change advancing earlier studies that explored the oscillation's global infclimate modeling results with weather observations published findings in Nature Climate Change advancing earlier studies that explored the oscillation's global infClimate Change advancing earlier studies that explored the oscillation's global influence.

They found the pattern has become more prominent in both observations and climate model simulations.

Titanic international projects that are just kicking off, including the National Science Foundation - funded Ocean Observatories Initiative and Southern Ocean Carbon and Climate Observations and Modeling project, promise to pile on reams of new data and knowledge in the coming years — not all of it expected to be postcard pretty.

«However, it is the bringing together of observations by ecologists, theory from biologists, physics from land surface modellers and climate science in the global modeling, that is revolutionary.»

The ARM Climate Research Facility is managed to ensure it fulfills its mission to provide observation data to improve the understanding of climate processes and the representation of those processes in climate Climate Research Facility is managed to ensure it fulfills its mission to provide observation data to improve the understanding of climate processes and the representation of those processes in climate climate processes and the representation of those processes in climate climate models.

There are some caveats with their study: The global climate models (GCMs) do not reproduce the 1930 - 1940 Arctic warm event very well, and the geographical differences in a limited number of grid - boxes in the observations and the GCMs may have been erased through taking the average value over the 90 - degree sectors.

Themes: Aerosols, Arctic and Antarctic climate, Atmospheric Science, Climate modelling, Climate sensitivity, Extreme events, Global warming, Greenhouse gases, Mitigation of Climate Change, Present - day observations, Oceans, Paleo - climate, Responses to common contrarian arguments, The Practice of Science, Solar forcing, Projections of future climate, Climate in the media, Meeting Reports, Miscellclimate, Atmospheric Science, Climate modelling, Climate sensitivity, Extreme events, Global warming, Greenhouse gases, Mitigation of Climate Change, Present - day observations, Oceans, Paleo - climate, Responses to common contrarian arguments, The Practice of Science, Solar forcing, Projections of future climate, Climate in the media, Meeting Reports, MiscellClimate modelling, Climate sensitivity, Extreme events, Global warming, Greenhouse gases, Mitigation of Climate Change, Present - day observations, Oceans, Paleo - climate, Responses to common contrarian arguments, The Practice of Science, Solar forcing, Projections of future climate, Climate in the media, Meeting Reports, MiscellClimate sensitivity, Extreme events, Global warming, Greenhouse gases, Mitigation of Climate Change, Present - day observations, Oceans, Paleo - climate, Responses to common contrarian arguments, The Practice of Science, Solar forcing, Projections of future climate, Climate in the media, Meeting Reports, MiscellClimate Change, Present - day observations, Oceans, Paleo - climate, Responses to common contrarian arguments, The Practice of Science, Solar forcing, Projections of future climate, Climate in the media, Meeting Reports, Miscellclimate, Responses to common contrarian arguments, The Practice of Science, Solar forcing, Projections of future climate, Climate in the media, Meeting Reports, Miscellclimate, Climate in the media, Meeting Reports, MiscellClimate in the media, Meeting Reports, Miscellaneous.

All these observations will be combined to improve climate models, which will provide an estimate of present - day and future surface melt on the East Antarctic ice shelves.

After a general trashing of various things including surface observations and climate models, he admitted that his prediction for the globally - averaged warming (of ~ 1.5 C by 2100) is within the IPCC range... albeit at the low end.

This paper proposes a more «all - around» lightweight ontology for CH materials in relation to CC, which greatly facilitates decision support and merges several pertinent aspects: CH Assets, Stakeholders and Roles, Climate Effects, Risk Management, conservation actions, materials, models, sensors and observations.

Observations of climate variables underpin much of the knowledge and modeling described here.

Various global temperature projections by mainstream climate scientists and models, and by climate contrarians, compared to observations by NASA GISS.

To get their results the researchers used sophisticated ice sheet and climate models and verified their results with independent geological observations from the oceans off Antarctica.

A very recent study by Saba et al. (2015) specifically analyzed sea surface temperatures off the US east coast in observations and a suite of global warming runs with climate models.