As a result, the phenomena I describe above, with
the rapid changes in circulation regimes, are not represented in the climate models at all except as gridcell sized averages...
Not exact matches
We know, however, that
rapid warming of the planet increases the risk of crossing climatic points of no return, possibly setting
in motion large - scale ocean
circulation changes, the loss of major ice sheets, and species extinctions.
Zhang, X., Sorteberg, A., Zhang, J., Gerdes, R. & Comiso, J. C. Recent radical shifts of the atmospheric
circulations and
rapid changes in the Arctic climate system.
The
RAPID / MOCHA (
Rapid Climate
Change / Meridional Overturning
Circulation and Heat Flux Array) array was deployed in March 2004 to continuously monitor the meridional overturning circulation
Circulation and Heat Flux Array) array was deployed
in March 2004 to continuously monitor the meridional overturning
circulationcirculation at 26 ° N.
There has been an ongoing debate, both
in and outside the scientific community, whether
rapid climate
change in the Arctic might affect
circulation patterns
in the mid-latitudes, and thereby possibly the frequency or intensity of extreme weather events.
Recent evidence from ice - core drilling
in Greenland indicates that similar fluctuations also occurred during the previous interglacial period, possibly due to
rapid changes in ocean
circulation.
Examples of such nonlinear behaviour include
rapid circulation changes in the North Atlantic and feedbacks associated with terrestrial ecosystem
changes.
«The authors write that «the notorious tropical bias problem
in climate simulations of global coupled general
circulation models manifests itself particularly strongly in the tropical Atlantic,»... they state that «the climate bias problem is still so severe that one of the most basic features of the equatorial Atlantic Ocean — the eastward shoaling thermocline — can not be reproduced by most of the IPCC assessment report models,... as they describe it, «show that the bias in the eastern equatorial Atlantic has a major effect on sea - surface temperature (SST) response to a rapid change in the Atlantic Meridional Overturning Circulation (AM
circulation models manifests itself particularly strongly
in the tropical Atlantic,»... they state that «the climate bias problem is still so severe that one of the most basic features of the equatorial Atlantic Ocean — the eastward shoaling thermocline — can not be reproduced by most of the IPCC assessment report models,... as they describe it, «show that the bias
in the eastern equatorial Atlantic has a major effect on sea - surface temperature (SST) response to a
rapid change in the Atlantic Meridional Overturning
Circulation (AM
Circulation (AMOC).»
The expected response to a step increase
in CO2 is to move from the relatively stable Holocene climate through a period of
rapid (
in geological terms)
change to a new, relatively stable climate with a higher overall temperature and somewhat different
circulation and rainfall patterns.
Changes in ocean circulation are thought to be able to produce large rapid temperature c
Changes in ocean
circulation are thought to be able to produce large
rapid temperature
changeschanges.
Motivated by findings that major components of so - called cloud «feedbacks» are best understood as
rapid responses to CO2 forcing (Gregory and Webb
in J Clim 21:58 — 71, 2008), the top of atmosphere (TOA) radiative effects from forcing, and the subsequent responses to global surface temperature
changes from all «atmospheric feedbacks» (water vapour, lapse rate, surface albedo, «surface temperature» and cloud) are examined
in detail
in a General
Circulation Model.
Driven by
changes in ocean
circulation, the
rapid sea level rise will bring increased risk of damage from hurricanes and winter storm surges, researchers say.
Abrupt climate
changes, such as the collapse of the West Antarctic Ice Sheet, the
rapid loss of the Greenland Ice Sheet or large - scale
changes of ocean
circulation systems, are not considered likely to occur
in the 21st century, based on currently available model results.
The models (and there are many) have numerous common behaviours — they all cool following a big volcanic eruption, like that at Mount Pinatubo
in 1991; they all warm as levels of greenhouse gases are increased; they show the same relationships connecting water vapour and temperature that we see
in observations; and they can quantify how the giant lakes left over from the Ice Age may have caused a
rapid cooling across the North Atlantic as they drained and
changed ocean
circulation patterns.