Not exact matches
Computer
models of
climate are one tool for specialists but what we
currently lack is not a better
model but expertise on how to use them
most appropriately.
«Cloud
climate feedback constitutes the
most important uncertainty in
climate modelling, and
currently even its sign is still unknown.
Sea ice is
currently thinning and shrinking more rapidly than projected by
most (
CLIMATE)
models.
The issue (# 4) of user - defined thresholds is also very important, and addressing issues related to such thresholds (with historical and paleo data and
models to create scenarios whereby critical thresholds might be exceeded) can actually be more straightforward than
most of what is
currently being provided by
climate scientists.
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.
But accepting the
climate models as our
currently best representation of the
climate system, the observations unmistakably point to higher ECS being more likely, and a substantially higher ECS than previously thought as
most likely — though the range of possible ECS obtained in this way is still wide, still indicating large uncertainties.
Coupled Atmosphere - Ocean General Circulation
Models (AOGCMs) provide a representation of the
climate system that is near the
most comprehensive end of the spectrum
currently available.
These results indicate that the cloud changes
most consistently predicted by global
climate models are
currently occurring in nature.
Currently available proxy data are equivocal concerning a possible increase in the intensity of the meridional overturning cell for either transient or equilibrium
climate states during the Pliocene, although an increase would contrast with the North Atlantic transient deep - water production decreases that are found in
most coupled
model simulations for the 21st century (see Chapter 10).
But never mind, my take - away is that they're asserting a three - phase approximation of
climate response as follows: 40 % after 5 years (the «fast» response) 75 % after 100 years (the «slow» response: as opposed to 60 %
currently used by
most models) and 100 % after a millennium (the «recalcitrant» remainder) Would you agree with this summary?