Chairman Lamar Smith (R - Texas): «Contrary to the claims of those who want to strictly regulate carbon dioxide emissions and increase the cost of energy for all Americans, there is a great amount of
uncertainty associated with climate science.»
Hence I set the uncertainty of the damage function to 65 % of the mean
uncertainty associated with climate sensitivity.
The only difference between the two panels is the degree of
uncertainty associated with climate sensitivity: The mean sensitivity is identical, but the spread (standard deviation) of the sensitivity distribution is greater in Panel B (standard deviation 2.5) than in Panel A (standard deviation.5).
I hope I've changed how you look at this diagram and how you consider
the uncertainty associated with climate sensitivity.
Three years ago Smith wrote in the Washington Post, «Contrary to the claims of those who want to strictly regulate carbon dioxide emissions and increase the cost of energy for all Americans, there is a great amount of
uncertainty associated with climate science.»
However, according to a recent study,
the uncertainties associated with climate engineering are currently so great that it can not be regarded as a substitute for, or a way of postponing, emission cuts.
However, a new study by VTT and the Finnish Meteorological Institute suggests that
the uncertainties associated with climate engineering are too great for it to provide an alternative to the rapid reduction of greenhouse gas emissions.
«Because the 21 individual reports are planned to address scientific
uncertainties associated with climate change and other technical subjects and are to be issued over a period of three or more years, it may be difficult for the Congress and others to use this information effectively as the basis for making decisions on climate policy,» according to the GAO.
Given that much of the science backing the consensus view is not in contention, and given that as we saw in the last entry in this series that there is an ethical need to be very careful in talking about
the uncertainties associated with climate science, a PR firm led strategy that emphasizes uncertainty without regard to how much of the science is settled is extraordinarily unethical.
«Given
the uncertainties associated with climate change and the unintended consequences of management, it isn't easy to identify a single best solution,» the researchers said of these regions.
Assumptions and
uncertainties associated with climate scenarios (Randall et al., 2007) are not considered here, other than to identify the greenhouse gas emission trends or socio - economic development pathways (e.g., SRES, Naki?enovi?
We have at least to consider the possibility that the scientific establishment behind the global warming issue has been drawn into the trap of seriously overstating the climate problem — or, what is much the same thing, of seriously understating
the uncertainties associated with the climate problem — in its effort to promote the cause.
The scientific
uncertainties associated with climate prediction are the basis of most of the arguments about the significance of climate change (25), and as well are the basis of much of the polarized public opinion on the political aspects of the matter.
In light of all this, we have at least to consider the possibility that the scientific establishment behind the global warming issue has been drawn into the trap of seriously overstating the climate problem — or, what is much the same thing, of seriously understating
the uncertainties associated with the climate problem.
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.
Using a hierarchical model, the authors combine information from these various sources to obtain an ensemble estimate of current and future
climate along
with an
associated measure of
uncertainty.
David Fahey, an atmospheric scientist at the National Oceanic and Atmospheric Administration in Boulder, Colorado, said that the researchers will need to do additional analyses to reduce the «significant
uncertainties associated with the role of black carbon in the
climate.»
But the
uncertainties associated with passing tipping points in the
climate system are dangerously large, the NRC committee finds.
In addition, a wide range of forcing schemes designed to span the approximate range of
uncertainties associated with anthropogenic
climate forcing estimates were generated and implemented in order to assess what differences in effects exist between the «best guess» counter-anthropogenic geoengineering forcing scheme and other plausible schemes.
After the field campaign, Fast will perform computer simulations to help evaluate all of the field campaign data and quantify the
uncertainties associated with using coarse grid global
climate models to study megacity emissions and to determine the radiative impact of the Mexico City particulates on the local and regional
climate.
I find the posts (and responses) are best when the reader gets clear explanations of the current understanding of
climate phenomena (
with the
associated uncertainties) and links to sources for further reading.
The top priorities should be reducing
uncertainties in
climate sensitivity, getting a better understanding of the effect of
climate change on atmospheric circulation (critical for understanding of regional
climate change, changes in extremes) and reducing
uncertainties in radiative forcing — particularly those
associated with aerosols.
They use
climate models to understand likely changes in the future and the
uncertainty associated with those predictions, and explain their findings using such popular indicates as the Palmer drought index.
This is also a good recent presentation of the various estimates of
climate sensitivity and of the amount of
uncertainty associated with them — found by doing a Google image search on the terms:
It is my understanding that the
uncertainties regarding
climate sensitivity to a nominal 2XCO2 forcing is primarily a function of the
uncertainties in (1) future atmospheric aerosol concentrations; both sulfate - type (cooling) and black carbon - type (warming), (2) feedbacks
associated with aerosol effects on the properties of clouds (e.g. will cloud droplets become more reflective?)
The inevitable
uncertainty associated with planetary
climate declarations is being exploited by those who have financial incentives to continue business as usual, mostly the fossil fuel and power companies.
Note that this figure illustrates the
uncertainties arising from different greenhouse gas scenarios and
climate models, but almost certainly underestimates the
uncertainty associated with carbon - cycle feedbacks.»
I suspect, however, that given the
uncertainties and ambiguities that necessarily are
associated with the
climate debate, this endeavor of yours will have little impact other than to further entrench already existing battle lines.
This summary report is a distillation of those technical documents and is intended to assist policy makers in understanding the projected impacts (and
uncertainties)
associated with climate variability and change on streamflow in selected BC watersheds.
Pielke Sr., R.A. J. Nielsen - Gammon, C. Davey, J. Angel, O. Bliss, N. Doesken, M. Cai., S. Fall, D. Niyogi, K. Gallo, R. Hale, K.G. Hubbard, X. Lin, H. Li, and S. Raman, 2007a: Documentation of
uncertainties and biases
associated with surface temperature measurement sites for
climate change assessment.
However, a prediction has
uncertainties associated with it and so does measurement and this is as true for general relativity as it is for
climate.
Any effective
climate regime must accommodate the
uncertainty associated with human - induced
climate change.
Why do
climate modellers put
uncertainties on their results, but I never hear any
uncertainties associated with the costs of implementing Kyoto?
Taken together, the combined evidence increases the level of confidence in the attribution of observed
climate change, and reduces the
uncertainties associated with assessment based on a single
climate variable.
First of all it's important to note that while there will always be
uncertainties associated with any area of scientific research, we have learned a lot about how the Earth's
climate functions.
This is absolutely correct, and it is primarily a manifestation of the profound
uncertainties associated with the details regarding how the
climate operates and what the economy will look like decades hence.
A new study by Prof Jason Lowe and Dr Dan Bernie at the UK's Met Office Hadley Centre takes these CMIP5 models and tries to account for additional
uncertainties in the carbon budget
associated with feedbacks, such as carbon released by thawing of permafrost or methane production from wetlands, as a result of
climate change.
Because of the open nature of
climate research and the freely available model data, they can do this (and have done this) without directly working
with climate scientists or understanding the
uncertainties and limitations
associated with the data.
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.
Indeed by producing large ensembles, for multiple different emission scenarios, we do present the
climate projections as a set of possible future
climate risks,
with associated uncertainty.
There's a real debate that needs to be had on the values, economics, and politics
associated with the risks of
climate change; lets have that debate in the context of a rational backdrop of what we understand about the
climate system, along
with the
uncertainties and unknowns.
Ensembles made
with the same model but different initial conditions only characterize the
uncertainty associated with internal
climate variability, whereas multi-model ensembles including simulations by several models also include the impact of model differences.
Alberta's
Climate Leadership Plan, which puts in place a comprehensive policy package, does not contain a GHG target, taking off the table the cost
uncertainties associated with target attainment.
The greatest fire management challenges lie in addressing simultaneously the threat to human well - being posed by fires, particularly at the wildland - urban interface; the
uncertainties associated with various fire - related land - management practices, such as thinning and controlled burns; and the complicating factor of
climate change.
There are also significant
uncertainties associated with some radiative forcings (aerosols in particular), and the possibility that
climate feedbacks are not linear (e.g. discussed in Long and Collins 2013).
Another critical
uncertainty is
associated with the
climate system itself.
Who hasn't heard politicians or media personalities use
uncertainty associated with some aspects of
climate change to claim that the science is «not settled»?
The HadSST3 adjustments minimise the effects of the biases and attempts to quantify
uncertainties associated with the estimation of the biases and the other two confounding effects, in order to better understand the
climate signal.
Key
uncertainties involve: 1) the degree to which increases in evapotranspiration versus permafrost thaw are leading to drier landscapes; 2) the degree to which it is these drier landscapes
associated with permafrost thaw, versus more severe fire weather
associated with climate change, that is leading to more wildfire; 3) the degree to which the costs of the maintenance of infrastructure are
associated with permafrost thaw caused by
climate change versus disturbance of permafrost due to other human activities; and 4) the degree to which
climate change is causing Alaska to be a sink versus a source of greenhouse gases to the atmosphere.
While
climate contrarians like Richard Lindzen tend to treat the
uncertainties associated with clouds and aerosols incorrectly, as we noted in that post, they are correct that these
uncertainties preclude a precise estimate of
climate sensitivity based solely on recent temperature changes and model simulations of those changes.