Not exact matches
The uncertainty associated
with future
climate projections linked to economic possibilities
of what people will do is far larger than the uncertainty associated
with physical
climate models.
The researchers then used a mathematical
model that combined the conflict data
with temperature and rainfall
projections through 2050 to come up
with predictions about the likelihood
of climate - related violence in the future.
On March 31 Muller testified in front
of Congress and confirmed what mainstream
climate scientists had been saying: Earth is warming in line
with the
projections of climate models.
The trends driven by earlier snowmelt are likely to as they are «are very much in line
with the
projections of future
climate» from
climate models, study co-author Berit Arheimer
of the Swedish Meteorological and Hydrological Institute said.
That could help
with projections of climate models and hypotheses
of broader changes to the rest
of the ecosystem.
No
climate model has ever been properly tested, which is what «validation» means, and their «
projections» are nothing more than the opinions
of «experts»
with a conflict
of interest, because they are paid to produce the
models.
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.
Having better economic
models should increase confidence in
projections of the effects
of various policies, and greatly improve communication
with climate modelers.
The paper prompted a MailOnline headline
of, «
Projections of global drought and flood may be flawed», while the Australian followed suit with, «Climate model projections on rain and drought wrong, study s
Projections of global drought and flood may be flawed», while the Australian followed suit
with, «
Climate model projections on rain and drought wrong, study s
projections on rain and drought wrong, study says».
Known as a «co-benefit,» using state
of the art
models for human and natural systems, along
with climate projections from the international community, the team was able for the first time to put a value on the global air pollution benefits
of cutting greenhouse gas emissions over the 21st century.
Burke, E.J., S.J. Brown, and N. Christidis, 2006:
Modelling the recent evolution
of global drought and
projections for the 21st century
with the Hadley Centre
climate model.
James Screen, a
climate researcher at the University
of Exeter, said in an email that while the findings are consistent
with model projections and look more robust than the studies linking warming to the larger fluctuations
of the jet stream, «I'd be cautious pinning the blame on Arctic warming.»
(in general, whether for future
projections or historical reconstructions or estimates
of climate sensitivity, I tend to be sympathetic to arguments
of more rather than less uncertainty because I feel like in general,
models and statistical approaches are not exhaustive and it is «plausible» that additional factors could lead to either higher or lower estimates than seen
with a single approach.
The eventual demise
of the summer sea ice is a common feature
of nearly every
climate model projection (the exceptions are
models with very inappropriate initial conditions).
Global
climate model projections (in CMIP3 at least) appear to underestimate sea ice extent losses
with respect to observations, though this is not universally true for all
models and some
of them actually have ensemble spreads that are compatible
with PIOMAS ice volume estimates and satellite observations
of sea ice extent.
When will «the use
of the latest information on external influences on the
climate system and adjusting for internal variability associated
with ENSO» make its way into the
projection model?
This data product will be useful in future studies, including as a benchmark for comparisons
with climate -
model simulations that attempt to account for both anthropogenic and natural factors in
projections of future
climate.
There are limited observational data to start
with, insufficient testing
of climate model simulations
of extremes, and (so far) limited assessment
of model projections.
We used new satellite records
of fire incidence to create fire
models which we then drove
with a broad range
of future
climate model scenarios to get a sense
of where the
climate projections agreed on the sign
of the change in fire frequency and where they did not.
No, it translates to
climate models can not accurately represent natural
climate variability, which is why they can't project future global temperature at even the 2 % confidence level: «we find that the continued warming stagnation
of fifteen years, 1998 - 2012, is no longer consistent
with model projections even at the 2 % confidence level» — vonStorch (2013)
John, On the «Presentation: Precautionary Principle...» thread you told me that you think it's «unhelpful to conflate discussion
of climate - science issues like the
modelling of SO2, about which none
of us here know very much,
with discussion
of economic
projections, where we can have a useful discussion.»
The Office will support the development
of climate models and
projections of future
climate, facilitate cooperation between regions and countries, and promote knowledge exchange and capacity building
with a particular focus on developing regions.
Penn State and the University
of Hawaii both shared a grant
of $ 770,000 for a research project called «Improved
Projections of the
Climate Response to Anthropogenic Forcing: Combining Paleoclimate Proxy and Instrumental Observations
with an Earth System
Model».
The harmonization was designed to provide a continuous, consistent set
of land use inputs for
climate models from 1500 through 2100
with a smooth transition between historical data (1500 — 2005) and future
projections (2005 — 2100)(see Hurtt et al. 2011).
This is all good news in light
of Audubon's
climate model projection that the species may lose 96 percent
of its current summer range by 2080,
with a limited chance
of expansion.
• Representation
of climate processes in
models, especially feedbacks associated
with clouds, oceans, sea ice and vegetation, in order to improve
projections of rates and regional patterns
of climate change.
The refusal in AR5 to accept the implications
of the best observational evidence and
of the over-estimation
of warming by the
climate models and accordingly to either: reject the ensemble
of GCM
projections; use
projections from a subset
of GCMs
with ECS and TCR values fairly close to the best observational estimates; or scale all GCM
projections to reflect those estimates is unscientific.
Citing the work
of Dr. John Christy and Richard McNider at the University
of Alabama in Huntsville (UAH), which compared
climate model projections with temperatures measured independently by satellites and weather balloons, he said «the average warming predicted to have occurred since 1979 (when the satellite data starts) is approximately three times larger than what is being observed.»
(September 12, 2016)- A collaboration
of university researchers, government agencies, and private sector groups released today a next - generation
climate modeling dataset
with improved local - scale
climate projections covering the 21st century for a region from northern Mexico to southern Canada.
Heavy snowfall and snowstorm frequency have increased in many northern parts
of the United States.2 The heavier - than - normal snowfalls recently observed in the Midwest and Northeast United States are consistent
with climate model projections.
Contrary to another claim made by Betts, we are conversant
with that research and have recently contributed to it by showing that
climate models do accommodate recent temperature trends when the phasing
of natural internal variability is taken into account — as it must be in comparing a
projection to a single outcome.
After these threats are identified for each resource, then the relative risk from natural - and human - caused
climate change (estimated from the global
climate model projections, but also the historical, paleo - record and worst case sequences
of events) can be compared
with other risks in order to adopt the optimal mitigation / adaptation strategy.
In this way the
climate scientists can ensure that the
projections are understood
with their associated uncertainties, and the impacts / adaptation researchers can ensure that the
climate scientists are aware
of the parts
of the
climate system they are most sensitive to, providing a focus for
climate model development efforts.
To the
climate people, «
projections» are future conditions (
with certain probabilities) based on
modeling of fundamental principles.
Climate scenarios from the Half a degree Additional warming,
Projections, Prognosis and Impacts project (HAPPI) are largely consistent
with transient scenarios extracted from RCP4.5 simulations
of the Coupled
Model Intercomparison Project phase 5 (CMIP5).
> A major advance
of this assessment
of climate change
projections compared
with the TAR is the large number
of simulations available from a broader range
of models.
If the
models show a lack
of skill and need tuning
with respect to predicting (in hindcast) even the current
climate statistics on multi-decadal time scales (much less than CHANGES in
climate statistics), they are not ready to be used as robust
projection tools for the coming decades.
Again, superposition
of this changing background
climate on
projections with high resolution
models resolving the relevant process does give valuable insights
of the possible changes in risks and vulnerability.
More definitive
projections await simulations by more accurate
climate models, perhaps
with higher densities
of computational points to provide greater spatial details
of simulated
climate processes.
We suggest, therefore, that
projections of future
climate based on these
models be viewed
with much caution.
The last point
of contention I have
with the «consensus» position is that all
of the projected
climate catastrophes are based on
climate model projections decades in the future.
These studies compare a particular
climate policy scenario
with a reference scenario corresponding to the
model projection of business as usual (BAU)-- that is, a world in which the economy continues on its current course
with carbon emissions unchecked.
Using CMIP5 simulations prescribed
with historical greenhouse gas concentrations and future
projections (representative concentration pathway 8.5), together
with the ECMWF (European Centre for Medium - Range Weather Forecast) operational ocean reanalysis
of the observed
climate and tide - gauge records to verify the
model results, the authors found that projected
climate change will enhance El Niño - related sea level extremes.
The RCPs provide a unique set
of data, particularly
with respect to comprehensiveness and detail, as well as spatial scale
of information for
climate model projections.
The widespread trend
of increasing heavy downpours is expected to continue,
with precipitation becoming less frequent but more intense.13, 14,15,16 The patterns
of the projected changes
of precipitation do not contain the spatial details that characterize observed precipitation, especially in mountainous terrain, because the
projections are averages from multiple
models and because the effective resolution
of global
climate models is roughly 100 - 200 miles.
Confronted
with obstinate refusal by nature to comply
with climate model predictions /
projections, she now has serious doubts and makes it very clear to the ragbag collection
of looney warmista that, like it or not, they have a very uncomfortable reality to confront.
In particular, we find that the observationally informed warming
projection for the end
of the twenty - first century for the steepest radiative forcing scenario is about 15 per cent warmer (+0.5 degrees Celsius)
with a reduction
of about a third in the two - standard - deviation spread (− 1.2 degrees Celsius) relative to the raw
model projections reported by the Intergovernmental Panel on
Climate Change.»
I came to the conclusion that one
of the major failures
of the
models & IPCC
climate projections is to think that the «inside» part
of the atmosphere is a constant heat transfer
with no influence on the
climate.
The
Modeling, Analysis, Predictions, and
Projections (MAPP) Program is a competitive grants program in the NOAA Office
of Oceanic and Atmospheric Research
Climate Program Office with the mission to enhance the United States» capability to understand and predict natural variability and changes in Earth's climate
Climate Program Office
with the mission to enhance the United States» capability to understand and predict natural variability and changes in Earth's
climate climate system.
However, there remains uncertainty in the rate
of sea ice loss,
with the
models that most accurately project historical sea ice trends currently suggesting nearly ice - free conditions sometime between 2021 and 2043 (median 2035).12 Uncertainty across all
models stems from a combination
of large differences in
projections among different
climate models, natural
climate variability, and uncertainty about future rates
of fossil fuel emissions.