In models at least, this kind of response would be most directly related to increases in stratification due to surface warming, as I understand it, and not directly to the kind
of change in atmospheric circulation discussed in Dian's paper.
The same might also be said about the NAO regarding repeated claims that the NAO index pressure differences are the cause, rather than the result,
of changes in atmospheric circulation, i.e., weather.
One effect
of the changes in atmospheric circulation will be faster transfer of heat to the Greenland Ice Sheet.
Full text here: Contribution
of changes in atmospheric circulation patterns to extreme temperature trends.
Not exact matches
This «would create a persistent layer
of black carbon particles
in the northern stratosphere that could cause potentially significant
changes in the global
atmospheric circulation and distributions
of ozone and temperature,» they concluded.
The greening
of Sahara strengthens the West African Monsoon, which triggers a
change in the
atmospheric circulation over the entire tropics, affecting tropical cyclone activity.
Lyon thinks this
change in temperatures has altered
atmospheric circulation patterns, cutting off the supply
of moisture to east Africa (Geophysical Research Letters, DOI: 10.1029 / 2011GL050337).
«But on top
of that,
changes in atmospheric circulation can favor particular weather conditions associated with heat waves.»
Retreating sea ice
in the Iceland and Greenland Seas may be
changing the
circulation of warm and cold water
in the Atlantic Ocean, and could ultimately impact the climate
in Europe, says a new study by an
atmospheric physicist from the University
of Toronto Mississauga (UTM) and his colleagues
in Great Britain, Norway and the United States.
«As a result, some
atmospheric circulations systems can not be resolved by these models, and this clearly impacts the accuracy
of climate
change predictions as shown
in our study.»
«This emphasizes the importance
of large - scale energy transport and
atmospheric circulation changes in restoring Earth's global temperature equilibrium after a natural, unforced warming event,» Li said.
In the North Atlantic, more heat has been retained at deep levels as a result
of changes to both the ocean and
atmospheric circulations, which have led to the winter atmosphere extracting less heat from the ocean.
The researchers warn, however, that the future evolution
of the AMO remains uncertain, with many factors potentially affecting how it interacts with
atmospheric circulation patterns, such as Arctic sea ice loss,
changes in solar radiation, volcanic eruptions and concentrations
of greenhouse gases
in the atmosphere.
A new analysis using
changes in cloud cover over the tropical Indo - Pacific Ocean showed that a weakening
of a major
atmospheric circulation system over the last century is due,
in part, to increased greenhouse gas emissions.
The team analyzed an index
of sea surface temperatures from the Bering Sea and found that
in years with higher than average Arctic temperatures,
changes in atmospheric circulation resulted
in the aforementioned anomalous climates throughout North America.
There are strong competing effects such as
changes in the large - scale
atmospheric circulation, sea surface temperature
changes like El Niño and La Niña and the dynamics
of westerly storm tracks that all interact at the mid-latitudes,» said Stanford co-author Matthew Winnick who contributed to the study with fellow doctoral student Daniel Ibarra.
They were Jorge Sarmiento, an oceanographer at Princeton University who constructs ocean -
circulation models that calculate how much
atmospheric carbon dioxide eventually goes into the world's oceans; Eileen Claussen, executive director
of the Pew Center for Global Climate
Change in Washington, D.C.; and David Keith, a physicist with the University
of Calgary
in Alberta who designs technological solutions to the global warming problem.
Your statement that «Thus it is natural to look at the real world and see whether there is evidence that it behaves
in the same way (and it appears to, since model hindcasts
of past
changes match observations very well)» seems to indicate that you think there will be no
changes in ocean
circulation or land use trends, nor any subsequent
changes in cloud responses thereto or other
atmospheric circulation.
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.
Changes in Hadley
circulation affects convection and thus
atmospheric moisture content and cloud cover which may
in turn affect net solar heating as well as the transfer
of heat from Earth to space.
For the hydrological modelling
of the Thames river catchment done at CEH we showed that the
changes in atmospheric circulation and precipitation caused higher peak 30 - day river flow, while flood risk mapping revealed a small increase
in flood risk for properties
in the Thames catchment.
«It's important to determine where we believe that some
of the recent trends
in circulation could potentially be linked with climate
change, rather than just natural variability,» Ted Shepherd, an
atmospheric scientist at the University
of Reading
in the U.K., said
in an email.
Wood, R.A., A.B. Keen, J.F.B. Mitchell, and J.M. Gregory, 1999:
Changing spatial structure
of the thermohaline
circulation in response to
atmospheric CO2 forcing
in a climate model.
As the planet warms from the buildup
of greenhouse gases, there may be a
change in the
atmospheric circulations near the equatorial Pacific Ocean.
Stouffer, R.J., and S. Manabe, 2003: Equilibrium response
of thermohaline
circulation to large
changes in atmospheric CO2 concentration.
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.
Gregory, J.M., et al., 2005: A model intercomparison
of changes in the Atlantic thermohaline
circulation in response to increasing
atmospheric CO2 concentration.
El Niño events consist — very broadly —
of an area
of warm water
in the equatorial Pacific coupled with
changes in atmospheric circulation.
Hoerling and Kumar (2003) attributed the drought to
changes in atmospheric circulation associated with warming
of the western tropical Pacific and Indian oceans, while McCabe et al. (2004) have produced evidence suggesting that the confluence
of both Pacific decadal and Atlantic multi-decadal fluctuations is involved.
Included
in resource are the following topics: Natural causes
of climate
change Evidence
of climate
change Global Warming Causes and effects
of climate
change Global
atmospheric circulation Tropical storms causes, characteristics, location and frequency Causes
of EL Nino Effects
of the Big Dry Adaptation to drought At the end
of the resources are pupil booklets.
So was there a climate shift after the turn
of the century involving
changes in ocean and
atmospheric circulation involving cloud
changes?
In a series of papers, we've shown that the warmer temperatures observed over the WAIS are the result of those same atmospheric circulation changes, which are not related to the SAM, but rather to the remote forcing from changes in the tropical Pacific: changes in the character of ENSO (Steig et al., 2012; Ding et al., 2011; 2012
In a series
of papers, we've shown that the warmer temperatures observed over the WAIS are the result
of those same
atmospheric circulation changes, which are not related to the SAM, but rather to the remote forcing from
changes in the tropical Pacific: changes in the character of ENSO (Steig et al., 2012; Ding et al., 2011; 2012
in the tropical Pacific:
changes in the character of ENSO (Steig et al., 2012; Ding et al., 2011; 2012
in the character
of ENSO (Steig et al., 2012; Ding et al., 2011; 2012).
The assessment considered the impacts
of several key drivers
of climate
change: sea level
change; alterations
in precipitation patterns and subsequent delivery
of freshwater, nutrients, and sediment; increased ocean temperature; alterations
in circulation patterns;
changes in frequency and intensity
of coastal storms; and increased levels
of atmospheric CO2.
The lag between decreases
in sea ice extent during late summer and
changes in the mid-latitude
atmospheric circulation during other seasons (when the recent loss
of sea ice is much smaller) needs to be reconciled with theory.
Global
changes of the
atmospheric composition and natural
circulation changes are
in competition to each other
in determining the Arctic surface climate.
Trying to infer
changes in atmospheric circulation from that data would be a very tricky business — but until know, that's what oceanographers have been stuck with — and the system could use a lot
of expansion.
A measure
of the difference
in sea level pressure between the western (e.g., Darwin, Australia) and central / eastern (e.g., Tahiti) equatorial Pacific, representative
of the east - west
changes in atmospheric circulation associated with the El Nino / Southern Oscillation phenomenon.
Some
of these
changes have a regularity within broad limits and the planet responds with a broad regularity
in changes of ice, cloud, Atlantic thermohaline
circulation and ocean and
atmospheric circulation.
However, if the loss
of Arctic Sea ice has significantly
changed global
atmospheric circulation patterns, then we are dealing with a different system that has only been
in existence since 2007, and we do not know how often to expect crop failures.
The lag between decreases
in sea ice extent during late summer and
changes in the mid-latitude
atmospheric circulation during other seasons (like autumn and winter, when the recent loss
of sea ice is much smaller) have been demonstrated empirically, but have not been captured by existing dynamical models.
How do the complex feedbacks
change atmospheric circulation patterns, and the interaction
of these patterns to
changes in ice cap topography (e.g. at the LGM)?
Changes in Southern Ocean circulation resulting from changes in Southern Ocean winds (23) or buoyancy fluxes (24) have been identified as the dominant cause of atmospheric CO2 changes (9,
Changes in Southern Ocean
circulation resulting from
changes in Southern Ocean winds (23) or buoyancy fluxes (24) have been identified as the dominant cause of atmospheric CO2 changes (9,
changes in Southern Ocean winds (23) or buoyancy fluxes (24) have been identified as the dominant cause
of atmospheric CO2
changes (9,
changes (9,10,25).
And given the fact that land warms more quickly than ocean, resulting
in areas
of low pressure over land,
changing patterns
of atmospheric and oceanic
circulation are bringing them to the coasts — where so much life's diversity is found.
Since El Nino also has an important impact on the Asian Summer Monsoon
in particular, its hard to know precisely what large - scale
changes in atmospheric circulation are due to the radiative forcing
of the eruption itself, and the secondary response to that eruption
of ENSO.
Your statement that «Thus it is natural to look at the real world and see whether there is evidence that it behaves
in the same way (and it appears to, since model hindcasts
of past
changes match observations very well)» seems to indicate that you think there will be no
changes in ocean
circulation or land use trends, nor any subsequent
changes in cloud responses thereto or other
atmospheric circulation.
Haarsma et al. (2015) argue on the basis
of model simulation that the weakening
of the Gulf Stream system will
in the future be the main cause
of changes in the
atmospheric summer
circulation over Europe.
All climate models tell us that it is the Arctic sea ice cover that declines first, and that Antarctic ice extent falls only later, and may even (as observed) temporarily increase
in response to
changing patterns
of atmospheric circulation.
The well - known impact
of El Niño on reducing Atlantic hurricane activity is
in fact due to increased shear from the associated
atmospheric circulation changes.
Other forcings, including the growth and decay
of massive Northern Hemisphere continental ice sheets,
changes in atmospheric dust, and
changes in the ocean
circulation, are not likely to have the same kind
of effect
in a future warming scenario as they did at glacial times.
Exceptions could occur
in areas with the smallest reductions
of extreme cold
in western North America, the North Atlantic and southern Europe and Asia due to
atmospheric circulation changes.