No one could say climate change was the direct cause of this storm, but rising temperatures and more powerful storms have been
predicted by climate models for more than two decades.
This can be understood as follows: because there is little uncertainty in the estimate
provided by climate models, the method considers that internal variability is partly responsible for the low observed value.
In other words, the real world is not accurately
captured by the climate models — the models predict that the world should warm up much faster than it actually does.
It is also predicted
by climate models in response to the rising greenhouse gas content of the atmosphere.
To quantify the effect of internal variability, simulations
generated by climate models are analyzed to determine the probability of ten year periods with zero or negative trends in surface temperature (5).
Furthermore, these recent past trends are also
supported by climate models, also suggesting an enhancement of the trends under future warmer climates.
This conclusion takes into account observational and forcing uncertainty, and the possibility that the response to solar forcing could be
underestimated by climate models.
So one way of detecting such an influence is through long - term changes in mean conditions, preferably guided
by climate model studies as to which variables and how they should change.
That «fingerprint» studies have proclaimed success at matching observed patterns of climate change with those
projected by climate models run with anthropogenic atmospheric inputs — yet which omit black carbon — can only be a sign of overfitting.
That information is a new insight that will likely be used
by the climate modeling community, including the scientists who contribute modeling expertise to the Intergovernmental Panel on Climate Change, said Lazaros Oreopoulos, a cloud and radiation budget researcher at NASA's Goddard Space Flight Center in Greenbelt, Maryland, who was not involved in the study.
Medieval warming in western North America is also
suggested by climate model simulations from the ECHO - g atmosphere - ocean general circulation model (GCM)(59, 60) that indicates annual temperatures in the region in the 12th and early 13th centuries were about 0.5 °C warmer than the long - term average (Fig. 2C and SI Text).
In the next several decades, warming produced
by climate model simulations indicates that sea level rise (SLR) could substantially exceed the rate experienced during modern human development along the California coast and estuaries.
It was interesting to read about the outcomes predicted
by climate models for the year 2100 based on crucial decisions...
Finally, the statistical estimate for the transient climate response falls within the range of estimates generated
by climate models run for the Coupled Model Intercomparison Project (CMIP)(26).
The continued declining trend in Arctic sea ice has been well
forecast by climate models, something that can't be said at the other end of the planet.
Standard experiments, agreed
upon by the climate modelling community to facilitate model intercomparison (see Section 8.1.2.2), have produced archives of model output that make it easier to track historical changes in model performance.
The size of this trend is consistent with theoretical predictions, is accurately
reproduced by climate model simulations and, within the climate models, is largely due to anthropogenic forcing.»
Cartoon comparing (a) Fi, instantaneous forcing, (b) Fa, adjusted forcing, which allows stratospheric temperature to adjust, (c) Fg, fixed Tg forcing, which allows atmospheric temperature to adjust, (d) Fs, fixed SST forcing, which allows atmospheric temperature and land temperature to adjust, and (e) DTs, global surface air temperature
calculated by the climate model in response to the climate forcing agent.»
The wind speeds and directions predicted
by the climate model explain phenomena such as the dominance of the seas by the Iron Fleet, the likely attack plans of invading dragon hordes from Essos, and the trading routes between Westeros and the Free cities across the Narrow Sea.
The graphs show this century's rising global surface temperatures as simulated
by climate models under different policy options.
The impact of the greenhouse gas CO2 on Earth's temperature is well
established by climate models and temperature records over the past 100 years, as well as coupled records of carbon dioxide concentration and temperature throughout Earth history.
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.
Climate skeptics frequently argue that the values of climate sensitivity that are reported by the IPCC and
displayed by climate models are too high.