Sentences with phrase «orbital forcing»

Confidence in the understanding of past climate change and changes in orbital forcing is strengthened by the improved ability of current models to simulate past climate conditions.
Based just on orbital forcing, and following previous ice age cycles, we are due for a long period of gradual cooling to the next ice age.
For the first few centuries, following orbital forcing and ice sheet decay properties, the climate warmed a bit.
This supported orbital forcing of the ice ages and led to speculation that another ice age was inevitable as the planet moved toward the corresponding configuration.
They accounted for the known orbital forcing and also considered other possible feedbacks, such as the aerosol loading of the atmosphere.
The «forcing bands» it mentions appear to be those of the various interacting orbital forcings, not the orbital, albedo and GHG forcings I have argued about.
The albedo and CO2 feedbacks amplified weak orbital forcings, the feedbacks necessarily changing slowly over millennia, at the pace of orbital changes.
First of all, simplify by imagining a box with orbital forcing as input and an (unobserable) temperature as output; the water vapor feed back is inside and is effectively instaneous on the scale of millennia appropriate for considerring ice age variations.
A look at the increasing temperature response to the same orbital forcings as average temperature dropped shows that climate sensitivity became significantly larger during the Pleistocene ice ages.
Indeed, its a very important paper in the history of climate, linking observed cycles in ocean sediment cores to orbital forcing periodicities.
While orbital forcing favours predictability at the scales it acts, the overview of climate variability at all scales suggests a big picture of irregular change and uncertainty of Earth's climate.
The paper you linked almost dismisses orbital forcing (Milankovitch cycles).
I should have added that there is a hypothesis (DeConto et al. 2010) that orbital forcing triggered the PETM.
Predicted changes in orbital forcing suggest that the next glacial period would begin at least 50,000 years from now, even in absence of human - made global warming (see Milankovitch cycles).
Moreover, anthropogenic forcing from increased greenhouse gases might outweigh orbital forcing for as long as intensive use of fossil fuels continues [9].
Isotopious @ 43 — It is generally agreed that orbital forcing [at high northern latitudes] is the cause of the changes between the three states of interglacial / interstade (mild glacial) / stade (full glacial).
Onset of deglacial warming in West Antarctica driven by local orbital forcing.
The theory of direct orbital forcing is obvously incorrect, since integral of insolation does not change for more than 0.1 % during eccentiricity variations.
Going back to the mid Holocene and further, orbital forcings figure strongly.
Now one way to study this is to take the average temperature of each millenium of the record: doing so shows the most recent millenium was the coolest and the one just previous next so; this is in keeping with orbital forcing theory.
In a short piece in the PAGES Newsletter, George Denton, Wally Broecker and I linked this excess ice and orbital forcing through ocean circulation to control of CO2, and others are surely thinking along the same lines.
Nor, I fear is your analysis of orbital forcing quite right; see David Archer's new book «The Long Thaw» or various of his papers; these may be obtained from his publications web page.
Strong positive feedbacks to the initial regional and seasonal orbital forcing are necessary to account for the eventual * global * glacial / interglacial climate shift.
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