CESM1, the state - of - the - art
climate model used in this study, has improved performance in the last few decades.
Figure 1 - Sea surface temperature trends scaled with global surface air temperature trends for half
the climate models used in the study.
The 22
climate models used in this study are the same models used by the UN Intergovernmental Panel of Climate Change (IPCC), which recently shared a Nobel Peace Prize with former Vice President Al Gore.
Here you can see the observed changes in maximum, minimum, mean global temperature, and DTR vs. predictions by the four
climate models used in the study.
Not exact matches
While tomatoes have been regularly
used as a
model organism to
study the effect of
climate in fruit ripening, its commercial history is a chequered one.
This
study looked at genetic (varieties) and management (row spacing and nitrogen) options to minimise the impact of
climate change,
using rain - out shelters to control rainfall; the results provided a platform to
model wheat production
in future
climates.
For the
study, Dr. Toohey and his colleagues from GEOMAR and the Max Planck Institute for Meteorology
in Hamburg have
used an aerosol -
climate model to track 70 different eruption scenarios while analyzing the distribution of the sulfur particles.
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.
When scientists
use climate models for attribution
studies, they first run simulations with estimates of only «natural»
climate influences over the past 100 years, such as changes
in solar output and major volcanic eruptions.
While large - scale
climate research
models offer a systems view of what the transport sector, for example, could contribute to
climate protection
in comparison to the energy sector, the
study presented
in Science, however, examines transport - related issues within the sector by
using more recent and more specific data on how people commute and travel.
The ability of the inorganic component of sea spray particles to take up water has been the focus of this international
study where a large suite of well - controlled laboratory experiments have shown, for the first time, that the hygroscopicity of the inorganic component of sea spray is significantly lower than pure sodium chloride, a substance routinely
used to describe their hygroscopicity
in climate models.
Many other
studies on black carbon's
climate influence have used models that have been used in reports by the Intergovernmental Panel on Climate
climate influence have
used models that have been
used in reports by the Intergovernmental Panel on
Climate Climate Change.
In the
study, the researchers
used a 3D computer
model of the atmosphere to determine the impact of VSLS on ozone and
climate.
Pinyon jay: flight to nowhere Johnson and his team
used climate models to
study the relationship between each target species and the vegetation it
uses for food resources, which is affected by shifts
in temperature and precipitation.
In a recent
study, Mathias Trachsel (Dept. of Biology, University of Bergen) and Atle Nesje (Dept. of Earth Science, University of Bergen and Uni Research
Climate)
used simple statistical
models to assess and quantify the relative importance of summer temperature and winter precipitation for annual mass balances of eight Scandinavian glaciers.
A new
study in Geophysical Research Letters
uses historical
climate model simulations to demonstrate that there has been an Arctic - wide decrease
in sea level pressure since the 1800's.
In the new work, Surabi Menon of the NASA Goddard Institute for Space Studies and colleagues used aerosol data collected from 46 ground stations in China to assess four different climate modeling scenario
In the new work, Surabi Menon of the NASA Goddard Institute for Space
Studies and colleagues
used aerosol data collected from 46 ground stations
in China to assess four different climate modeling scenario
in China to assess four different
climate modeling scenarios.
Elisabetta Pierazzo of the Planetary Science Institute
in Tucson, Arizona, and colleagues
used a global
climate model to
study how water vapour and sea salt thrown up from an impact will affect ozone levels for years after the event.
Vincent Saba, a research fishery biologist at NOAA's Northeast Fisheries Science Center (NEFSC), and his
study co-authors
used annual nest counts from Florida and a time - series of
climate data
in turtle - nesting population
models.
In their study, the researchers used an ensemble of climate models to simulate the concentrations of ozone and PM2.5 in the years 2000 and 185
In their
study, the researchers
used an ensemble of
climate models to simulate the concentrations of ozone and PM2.5
in the years 2000 and 185
in the years 2000 and 1850.
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.
In the GRL
study, researchers
used a statistical
model based on historical
climate data to separate how much of the extreme rainfall from Hurricane Harvey was due to natural influences and how much was due to human influences.
Noting that the timing of KD outbreaks
in Japan coincides with certain wind patterns from Asia,
climate scientist Xavier Rodó, PhD, and colleagues at the Catalan Institution for Research and Advanced Studies and the Catalan Institute of Climate Sciences, both in Barcelona, used computer models to simulate air currents and airborne particle transport for all days since 1977 with high numbers of KD cases in Japan, based on data compiled by Yoshikazu Nakamura, MD, and colleagues at Jichi Medical University in
climate scientist Xavier Rodó, PhD, and colleagues at the Catalan Institution for Research and Advanced
Studies and the Catalan Institute of
Climate Sciences, both in Barcelona, used computer models to simulate air currents and airborne particle transport for all days since 1977 with high numbers of KD cases in Japan, based on data compiled by Yoshikazu Nakamura, MD, and colleagues at Jichi Medical University in
Climate Sciences, both
in Barcelona,
used computer
models to simulate air currents and airborne particle transport for all days since 1977 with high numbers of KD cases
in Japan, based on data compiled by Yoshikazu Nakamura, MD, and colleagues at Jichi Medical University
in Japan.
«It's an evolution
in our ability to
use climate models to make predictions, particularly on timescales of a few decades,» says McKinley, also an affiliate of the Center for Climatic Research at UW - Madison's Nelson Institute for Environmental
Studies.
«Factors affecting extinction and origination of species are surprisingly different, with past
climate change having the highest impact on extinction but not on originations,» notes researcher Daniele Silvestro from the GGBC who developed the mathematical
model used in the
study.
Subsequently cited
in 54 papers, the Science
study showed that even
using the lower end of 23
climate models suggested that
in the tropics at the end of the century, «the hottest seasons on record will represent the future norm
in many locations,» with the devastating impacts on wheat and rice yields.
Bringing together observed and simulated measurements on ocean temperatures, atmospheric pressure, water soil and wildfire occurrences, the researchers have a powerful tool
in their hands, which they are willing to test
in other regions of the world: «
Using the same
climate model configuration, we will also
study the soil water and fire risk predictability
in other parts of our world, such as the Mediterranean, Australia or parts of Asia,» concludes Timmermann.
Most
climate negotiation
modeling studies have
used social dilemma games such as the prisoner's dilemma,
in which the best interests of the individual agent are not the same as those of the whole.
Trenberth says, and some scientists agree, that attribution
studies that
use climate models do not work well for weather events that are local and dynamic — a flash
in the pan.
He and his colleagues
used more than a dozen
climate models to determine the temperature and likely snow duration
in the
study area for 2050 and 2099.
The
study, published online today
in Nature Communications,
used sophisticated
climate model simulations to show that El Niño tends to peak during the year after large volcanic eruptions like the one at Mount Pinatubo
in the Philippines
in 1991.
CSIRO, the Bureau of Meteorology and the ARC Centre of Excellence for
Climate System Science developed the Australian Community
Climate and Earth System Simulator (ACCESS)
model used in this
study in partnership.
«The 3 - D
climate modeling used in the new
study begins to address these questions with a new level of sophistication by investigating how specific locations might have accumulated rain or snow,» she added.
The
study noted that the same
climate models the UN IPCC
uses can only «explain only about half of the heating that occurred during a well - documented period of rapid global warming
in Earth's ancient past.»
The
study used three
climate models that handle the basic atmospheric calculations and physics
in different ways.
The scientists carefully evaluated many aspects of the
climate in the four simulations,
using measurements taken from the area, data pulled together from other
studies, and data produced by the
model.
Studies of
climate change
using global
climate models with a focus on changes
in the hydrological cycle.
Previously, Kelly was a Postdoctoral Fellow and Research Associate at the University of Washington and the University of Victoria
in British Columbia, Canada where she
studied the role of the changing Arctic sea ice cover on global circulation, weather, and
climate using a hierarchy of numerical global
climate models.
A couple of commentators (Pat Michaels, Roy Spencer) recently raised an issue about the standard scenarios
used to compare
climate models,
in this case related to a
study on the potential increase
in hurricane activity.
This is a 0.9 ºC reduction from the sensitivity of 2.5 °C estimated
in that predecessor
study, which
used the same
climate model.
The
study uses climate modelling to predict three possible futures - the low, medium and high impact scenarios, which describe the severity of outcomes that could be expected
in a changed
climate.
The analysis of processes contributing to
climate feedbacks
in models and recent
studies based on large ensembles of
models suggest that
in the future it may be possible to
use observations to narrow the current spread
in model projections of
climate change.
The work initiated by Mann and his colleagues is still
in its infancy, and as such further
study, the
use of wider proxy networks and the development of more sophisticated
climate models will all be necessary future steps
in propagating this research.
Furthermore, all approaches that
use the
climate's time evolution attempt to account for uncertainty due to internal
climate variability, either by bootstrapping (Andronova and Schlesinger, 2001), by
using a noise
model in fingerprint
studies whose results are
used (Frame et al., 2005) or directly (Forest et al., 2002, 2006).
Wigley et al. (1997) pointed out that uncertainties
in forcing and response made it impossible to
use observed global temperature changes to constrain ECS more tightly than the range explored by
climate models at the time (1.5 °C to 4.5 °C), and particularly the upper end of the range, a conclusion confirmed by subsequent
studies.
Be that as it may, all these
studies, despite the large variety
in data
used,
model structure and approach, have one thing
in common: without the role of CO2 as a greenhouse gas, i.e. the cooling effect of the lower glacial CO2 concentration, the ice age
climate can not be explained.
«[B] y making
use of 21 CMIP5 coupled
climate models, we
study the contribution of external forcing to the Pacific Ocean regional sea level variability over 1993 — 2013, and show that according to
climate models, externally forced and thereby the anthropogenic sea level fingerprint on regional sea level trends
in the tropical Pacific is still too small to be observable by satellite altimetry.»
One can temper that with
studies of paleoclimate sensitivity, but the ensemble results still should be borne
in mind, since doubling CO2 takes us into a
climate that has no real precendent
in the part of the
climate record which has been
used for exploring
model sensitivity, and
in many regards may not have any real precedent
in the entire history of the planet (
in terms of initial condition and rapidity of GHG increase).
I
used to be active
in the radiation field, indeed I co chaired the first ICRCCM
study (Intercomparison of Radiation Codes for
Climate Models).
The atmospheric components of
climate models were never really designed for the
study of TCs, but the fact that they can produce features with TC - like character when run at sufficiently high resolutions, gives us increased confidence
in the possibility that
climate models can be
used to analyze
climate change impacts on TCs.