Not exact matches
Attributable human -
induced changes in the likelihood and
magnitude of the observed extreme precipitation during Hurricane Harvey.
As part
of the World Weather Attribution (WWA) team CPDN scientists have looked at observational data and model simulations, including weather@home to identify whether and to what extend human -
induced climate
change influenced the likelihood and
magnitude of this extreme event.
Higher metabolic and survival costs
induced by predation risk were only partially offset by
changes in consumption rates and assimilation efficiencies and the
magnitude of non-consumptive effects varied as a function
of temperature.
Extrapolating from their forest study, the researchers estimate that over this century the warming
induced from global soil loss, at the rate they monitored, will be «equivalent to the past two decades
of carbon emissions from fossil fuel burning and is comparable in
magnitude to the cumulative carbon losses to the atmosphere due to human - driven land use
change during the past two centuries.»
In many cases, it is now often possible to make and defend quantitative statements about the extent to which human -
induced climate
change (or another causal factor, such as a specific mode
of natural variability) has influenced either the
magnitude or the probability
of occurrence
of specific types
of events or event classes.»
In my opinion, a possible global climate
change -
induced increase
of a percent or two here or there in the number
of tornadoes / hurricanes / * enter your favorite hazard here * is orders
of magnitude smaller (in terms
of a problem) in comparison to vulnerability issues.
The rate and
magnitude of future human -
induced climate
change and its associated impacts are determined by human choices defining alternative socio - economic futures and mitigation actions that influence emission pathways.
While this is certainly a true statement, it does not follow that we should increase the frequency and
magnitude of water resource stress by increasing evaporation, drought frequency, water loss from plants, etc., as the USGCRP report notes will occur as human -
induced climate
change increases.
Importantly, the
changes in cereal yield projected for the 2020s and 2080s are driven by GHG -
induced climate
change and likely do not fully capture interannual precipitation variability which can result in large yield reductions during dry periods, as the IPCC (Christensen et al., 2007) states: ``... there is less confidence in the ability
of the AOGCMs (atmosphere - ocean general circulation models) to generate interannual variability in the SSTs (sea surface temperatures)
of the type known to affect African rainfall, as evidenced by the fact that very few AOGCMs produce droughts comparable in
magnitude to the Sahel droughts
of the 1970s and 1980s.»
Over and over again opponents
of climate
change policies have argued that nations need not act to reduce the threat
of climate
change because there are scientific uncertainties about the
magnitude and timing
of human -
induced climate
change impacts.
Will this new interest in human -
induced global warming lead to a cure
of the grave US media failures to communicate adequately to the American people the urgency and
magnitude of the threat to the world entailed by climate
change?
In previous entries, Ethicsandclimate.org examined the failure
of the US media to communicate about: (a) the nature
of the strong scientific consensus about human -
induced climate
change, (b) the
magnitude of greenhouse gas emissions reductions necessary to prevent catastrophic climate
change, (c) the practical significance for policy that follows from understanding climate
change as essentially an ethical problem, (e) the consistent barrier that the United States has been to finding a global solution to climate
change in international climate negotiations, and (f) the failure
of the US media to help educate US citizens about the well - financed, well - organized climate
change disinformation campaign.
Because it has been scientifically well established that there is a great risk
of catastrophic harm from human -
induced change (even though it is acknowledged that there are remaining uncertainties about timing and
magnitude of climate
change impacts), no high - emitting nation, sub-national government, organization, business, or individual
of greenhouse gases may use some remaining scientific uncertainty about climate
change impacts as an excuse for not reducing its emissions to its fair share
of safe global greenhouse gas emission on the basis
of scientific uncertainty.
To slow the rate
of anthropogenic -
induced climate
change in the 21st century and to minimize its eventual
magnitude, societies will need to manage the climate forcing factors that are directly influenced by human activities, in particular greenhouse gas and aerosol emissions.
As the planet enters a phase
of human -
induced climate
change of unprecedented speed and
magnitude, however, previously locally - adapted populations are rendered less suitable for new conditions, and «natural» biotic and abiotic disturbances are taken outside their historic distribution, frequency and intensity ranges.
The warming proponents have falsely assumed that the observed
changes are human
induced when in fact they are the result
of natural
changes an order
of magnitude or two greater.
The skin itself cools by about 0.3 or 0.4 K due to radiative fluxes at the skin surface, which is a
change that is two orders
of magnitude greater than the alleged heat
change in the skin layer
induced by GHGs.
As part
of the World Weather Attribution (WWA) team CPDN scientists have looked at observational data and model simulations, including weather@home to identify whether and to what extend human -
induced climate
change influenced the likelihood and
magnitude of this extreme event.
While individual events can not be directly linked to human -
induced climate
change, the frequency and
magnitude of these types
of events are predicted to increase in a warmer world.
The severity
of damaging human -
induced climate
change depends not only on the
magnitude of the
change but also on the potential for irreversibility.