Sentences with phrase «earth orbital parameters»

Not exact matches

The now hyper - arid Sahara desert was characterized by a lush extent of grass and consequently reduced dust emission due to changes in Earth's orbital parameters.

«Step back and think about this: Small variations in the orbital parameters of the Earth — tilt and eccentricity and wobble — are recorded on the sea floor,» says Richard Katz, a geodynamicist at the University of Oxford in the United Kingdom and a co-author of the Science paper.

«Human influence is so dominant now,» Baker asserts, «that whatever is going to go on in the tropics has much less to do with sea surface temperatures and the earth's orbital parameters and much more to do with deforestation, increasing atmospheric carbon dioxide and global warming.»

While natural global warming during the ice ages was initiated by increased solar radiation caused by cyclic changes to Earth's orbital parameters, there is no evident mechanism for correcting Anthropogenic Global Warming over the next several centuries.

Natural global warming is self - rectifying either by slow chemical weathering processes responsible for mineral sequestration of carbon or by gradual return of Earth's orbital parameters to what they were before the onset of global warming, thereby significantly reducing the amount of solar radiation reaching the Earth's surface.

«What we show in our paper is that we escaped the glacial inception naturally, thanks to a proper combination of Earth's orbital parameters and natural CO2 concentration.»

It is believed that the PETM was likely initiated by changes of the orbital parameters of the Earth (eccentricity, obliquity and precession of axis) causing an increase in the intensity and distribution of solar radiation reaching the earth (Sexton et al, 2Earth (eccentricity, obliquity and precession of axis) causing an increase in the intensity and distribution of solar radiation reaching the earth (Sexton et al, 2earth (Sexton et al, 2011).

While Milankovitch forcing predicts that cyclic changes in the Earth's orbital parameters can be expressed in the glaciation record, additional explanations are necessary to explain which cycles are observed to be most important in the timing of glacial — interglacial periods.

Recent modelling work provides strong support for the important role of variations in the Earth's orbital parameters in generating long - term climate variability.

Just a quick note to say that the paleoclimate data for earlier warm periods 125,000 years ago and even 8 - 10,000 years ago in northern Alaska (paleoclimate warmer than now, [from] different forcings) document the northward advance of the treeline from Nome to Barrow, Alaska, and the Canadian border at different times of change in Earth's orbital parameters (without a significant change in CO2).

Natural global warming is self - rectifying either by slow chemical weathering processes responsible for mineral sequestration of carbon or by gradual return of Earth's orbital parameters to what they were before the onset of global warming, thereby significantly reducing the amount of solar radiation reaching the Earth's surface.

The Milankovich cycles (variations in orbital parameters of the Earth) regulate the ice ages («pacemakers» Imbrie called them) by controlling insolation above 65 degrees N latitude.

In the case of the 100 kyr ice age cycles, that forcing is high northern latitude summer insolation driven by predictable changes in Earth's orbital and rotational parameters — aka, Milankovitch theory — which has the intial effect of melting glaciers, thereby reducing albedo at those latitudes.

Regular variation in the Earth's orbital parameters has been identified as the pacemaker of climate change on the glacial to interglacial time scale (see Berger, 1988 for a review).