Not exact matches
Statisticians can analyze these
climate models along
with direct
observations to learn about Earth's
climate.
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.
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.
Up until now laboratory measurements have struggled to answer this question accurately enough to allow
climate scientists to interpret their results
with the detail their
observations require.»
But Robeson said the
observation aligns
with theories about
climate change, which hold that amplified warming in the Arctic region produces changes in the jet stream, which can result in extended periods of cold weather at some locations in the mid-northern latitudes.
«The highly accurate and precise data from Glory, in combination
with observations from the rest of the A-Train, will enable researchers to improve our understanding of the Earth system by improving our ability predict future
climate,» she said.
It was not until 1976 that a paper published in Science by John A. Eddy of Saginaw Valley State University renewed interest in the sun -
climate relationship
with a comprehensive analysis of many different historical records of solar
observation.
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.
Yet even
with those caveats, Shell praised the approach laid out in the new research as a «simple diagnostic... [and] an encouraging step that links
observations to
climate sensitivity.»
Wiedinmyer also wants to put her estimates into models of
climate and air movement and see if they match up
with current air
observations.
Based on past
observations, Held, who was not involved
with the study, said the
climate sensitivity of 5 °C or more shown by the new research may be implausible.
To arrive at their results, the researchers combined
observations from the past century
with climate simulations of the atmospheric response to the AMO.
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.
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 inf
climate modeling results
with weather
observations published findings in Nature
Climate Change advancing earlier studies that explored the oscillation's global inf
Climate Change advancing earlier studies that explored the oscillation's global influence.
«I would expect to see restrictions on the parts of the budget of the agencies that collect that sort of data... and proposed cuts to the divisions of those agencies that deal
with Earth
observations and
climate prediction.»
«
With these new
observations we can determine which models reproduce the most accurate response to changes in the global
climate.
With more than 300 instrument systems providing ground - based
climate observations, ARM relies heavily on instrument scientists and engineers known as instrument mentors for calibrating and assessing the status of the instruments.
Then they will compare those
observations with their field and laboratory results regarding the impacts of
climate variability on sap flow and quality, Ahmed said.
I was out at the US Jet Propulsion Laboratory in Pasadena, California, last week to form a collaboration
with their
climate research centre, to bring together their Earth -
observation expertise
with our modelling expertise.
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.
Where
climate sensitivity is estimated in studies involving comparing
observations with values simulated by a forced
climate model at varying parameter settings (see Appendix 9.
Instead, the web special opened
with «Estimates of future global temperatures based on recent
observations must account for the differing characteristics of each important driver of recent
climate change», which sounds a bit ho - hum, if not, well, duh?
Beckwith replies it's almost a battle between
climate modelers, like David Archer, and researchers
with observations on the ground, like Shakhova and here Russian counterparts.
The extra data spanning many thousands of years that this study uncovers will go a long way to matching model projections
with past
observations, helping scientists identify the most accurate models for making predictions of future
climate change.
So, what was predicted is not consistent
with the on - going
observations of global
climate.
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.
Abatzoglou and two Oregon State University scientists compared weather
observations with climate data for Oregon, Washington, Idaho and western parts of Montana and Wyoming.
Highlights of the annual meeting included a session focusing on the role of
observations in
climate change research and breakout sessions
with topics ranging from current field campaigns to new instruments.
The Ocean
Observations Panel for
Climate (OOPC) is a scientific expert advisory group charged with making recommendations for a sustained global ocean observing system for climate in support of the goals of its sp
Climate (OOPC) is a scientific expert advisory group charged
with making recommendations for a sustained global ocean observing system for
climate in support of the goals of its sp
climate in support of the goals of its sponsors.
Annan, J.D., et al., 2005b: Efficiently constraining
climate sensitivity
with palaeoclimate
observations.
Scientists are using airborne
observations of atmospheric trace gases, aerosols, and cloud properties from the North Slopes of Alaska to improve their understanding of global
climate,
with the goal of reducing the uncertainty in global and regional
climate simulations and projections.
Observations of Aerosol / Trace Gases, Clouds, Precipitation, and Radiation from DOE Atmospheric Radiation Measurement (ARM)
Climate Research Facility (Joint
with the 19th Conference on Atmospheric Chemistry; the 9th Symposium on Aerosol - Cloud -
Climate interactions to host)
The ARM Aerosol Measurement Science Group (AMSG) coordinates ARM
Climate Research Facility observations of aerosols and atmospheric trace gases with user needs to ensure advanced, well - characterized observational measurements and data products — at the spatial and temporal scales necessary — for improving climate science and model for
Climate Research Facility
observations of aerosols and atmospheric trace gases
with user needs to ensure advanced, well - characterized observational measurements and data products — at the spatial and temporal scales necessary — for improving
climate science and model for
climate science and model forecasts.
Another approach uses the response of
climate models, most often simple
climate models or Earth System Models of Intermediate Complexity (EMICs, Table 8.3) to explore the range of forcings and
climate parameters that yield results consistent
with observations (Andronova and Schlesinger, 2001; Forest et al., 2002; Harvey and Kaufmann, 2002; Knutti et al., 2002, 2003; Forest et al., 2006).
«We use a massive ensemble of the Bern2.5 D
climate model of intermediate complexity, driven by bottom - up estimates of historic radiative forcing F, and constrained by a set of
observations of the surface warming T since 1850 and heat uptake Q since the 1950s... Between 1850 and 2010, the
climate system accumulated a total net forcing energy of 140 x 1022 J
with a 5 - 95 % uncertainty range of 95 - 197 x 1022 J, corresponding to an average net radiative forcing of roughly 0.54 (0.36 - 0.76) Wm - 2.»
It's a long paper
with a long title: «Ice melt, sea level rise and superstorms: evidence from paleoclimate data,
climate modeling, and modern
observations that 2 oC global warming could be dangerous».
We use simple representations of the carbon cycle and global temperature, consistent
with observations, to simulate transient global temperature and assess carbon emission scenarios that could keep global
climate near the Holocene range.
The statistics of the weather make short term
climate prediction very difficult — particularly for
climate models that are not run
with any kind of initialization for
observations — this has been said over and over.
Working
with Tom Chase, a colleague at the institute, the researchers were comparing
climate simulations from the Community Land Model — part of a select group of global models used in the Intergovernmental Panel on Climate Change's 2007 climate change report — against observ
climate simulations from the Community Land Model — part of a select group of global models used in the Intergovernmental Panel on
Climate Change's 2007 climate change report — against observ
Climate Change's 2007
climate change report — against observ
climate change report — against
observations.
At the end of the
observation, the observer wrote a summary addressing seven key features of the classroom ecology: (a) the general instructional approach used in the classroom, instructional sequences observed, approaches to word recognition, vocabulary, and comprehension instruction; (b) curriculum materials used; (c) teacher's style of interacting
with the children; (d) teacher's grouping practices, and activities of children not
with the teacher; (e) student engagement; (f) classroom management; and (g) classroom
climate.
She also discusses his prediction of human - induced
climate change, his remarkable ability to fashion poetic narrative out of scientific
observation, and his relationships
with iconic figures such as Simón Bolívar and Thomas Jefferson.
As of last week, the Market
Climate for stocks remained in the most negative 0.5 % of all historical
observations, and was characterized by rich valuations, unfavorable market action, and a variety of hostile «Aunt Minnies» that are associated
with poor subsequent returns.
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 models run
with the GISS forcing data, the «natural + anthropogenic» temperature evolution matches
observations very well for a
climate sensitivity of 0.75 °C / W / m ², which agrees
with the value derived from palaeoclimate data.
For the 20th and 21st century we have many more direct
observations of the Sun, the clouds, and so forth, and are on much firmer ground
with regard to saying what the Sun is or isn't doing to
climate.
Since OHC uptake efficiency associated
with surface warming is low compared
with the rate of radiative restoring (increase in energy loss to space as specified by the
climate feedback parameter), an important internal contribution must lead to a loss rather than a gain of ocean heat; thus the
observation of OHC increase requires a dominant role for external forcing.
Recent
observations show that societies are highly vulnerable to even modest levels of
climate change,
with poor nations and communities particularly at risk.
A simple comparison of
observations with projections based on real world
climate forcings shows a very close match, especially if we take natural unforced variability into account as well (mainly ENSO).
This was one of the motivations for our study out this week in Nature
Climate Change (England et al., 2014) With the global - average surface air temperature (SAT) more - or-less steady since 2001, scientists have been seeking to explain the climate mechanics of the slowdown in warming seen in the observations during 2001
Climate Change (England et al., 2014)
With the global - average surface air temperature (SAT) more - or-less steady since 2001, scientists have been seeking to explain the
climate mechanics of the slowdown in warming seen in the observations during 2001
climate mechanics of the slowdown in warming seen in the
observations during 2001 - 2013.