Sentences with phrase «orbital cycles»

The phrase "orbital cycles" refers to the repetitive patterns or movements of an object in space, specifically in its orbit around another object. Full definition
But then the observed data are not perfect by any means and span a long time period (multiple orbital cycles) and so there may be some apples / oranges comparisons going on.
There are other forcings - dust orbital cycles etc..
Kukla showed how past changes in orbital cycles very slightly altered the amount of solar energy hitting the Earth, leading to past glacial and interglacial periods.
A simple example is to think of ice age cycles, which are controlled purely by energy balance (solar cycles + orbital cycles + atmospheric composition) and there is not a large sensitivity to initial conditions.
All through the Pleistocene, the greenhouse gas feedback had turned the planet's orbital cycles from minor climate variations to grand transformations that affected all life on the planet.
Now into the sketchy areas, the initiation of the cooling events is indeed consistent with orbital cycles, but there are a lot of uncertainties in the details and among them are some controversies about the accuracy of dating, specifically the relative timing of changes in temp proxies and CO2.
A new study by Kaloyan Penev et al suggests that Q varies a lot depending on the tidal «forcing period» (that is, the period at which a planet would appear to orbit, if viewed when rotating with the spinning star, with an extra factor of a half since there are two tides per orbital cycle).
The Earth's natural orbital cycles [precession] were driving a simultaneous natural cooling trend, especially at high northern latitudes.
Natural factors contributing to past climate change are well documented and include changes in atmospheric chemistry, ocean circulation patterns, solar radiation intensity, snow and ice cover, Earth's orbital cycle around the sun, continental position, and volcanic eruptions.
«There are other, shorter orbital cycles, but when you look into the past, it's very difficult to know which one you're dealing with at any one time, because they change over time.
You seem to be under the misimpression that because orbital cycles controlled the glacial - inter glacial cycles they must be controlling the temperature now.
Some relatively small change in the system — long orbital cycles and fresh water runoff in the Artic — trigger a shift in planetary climate.
How exactly these Jupiter and Saturn orbital cycles are supposed to impact the Earth's surface temperature is left unexplained, and thus there are no realistic physical constraints on their parameters «A» and «B», which correspond to the amplitude of the cyclical effects on global surface temperature.
Though Milan Milankovitch would not perform his definitive calculations of the Earth's orbital cycles for three decades yet, the Serb was not the first to consider the effects of cyclic orbital changes.
Three main orbital cycles, known as Milankovitch cycles, result:
Over the past million years, shifts in orbital cycles influenced the amount of sunlight falling on the northern hemisphere and played a major role in the waxing and waning of ice ages.
The long - term cooling in the Arctic can be attributed to the effect of orbital cycles and is known from previous studies.
Glacials happen when the 100,000 year Milankovitch orbital cycle is such that summer irradiance in high northern latitudes is at its lowest point — allowing the persistence of ice fields.
And in fact, the relevant scientists believe the observation described above is the result of a regional change caused by Mars» own orbital cycles, like what happened during the earth's glacial cycles.
This is a little bit silly, since the authors titled an entire section of their paper The trigger for deglacial warming, discussing that the first warming (of the Arctic 19,000 years ago) was indeed triggered by orbital cycles.
«I'm not sure everyone will be convinced that the orbital anomaly alone is responsible,» Zachos says, «but the congruence of those orbital cycles is a very rare event, and the fact that it exactly corresponds with this rare climatic event is compelling.»
«Of all the records so far, this is both the longest and, also, the clearest that most of the climatic variations between glacial and interglacial at that time [were] most likely related to orbital cycles,» Plike says.
And a study by Rahmstorf (2003) also concludes that the LIA may be the most recent cold phase of the D - O cycle, and his research suggests that the 1,470 - year periodicity is so regular that it's more likely due to an orbital cycle than a solar cycle.
«While the earlier estimate of ± 20 % [Schulz, 2002] is consistent with a solar cycle (the 11 - year sunspot cycle varies in period by ± 14 %), a much higher precision would point more to an orbital cycle.
When the orbital cycle brought increased the intensity of insolation in the northern hemisphere, ice sheets melted and we went into a warm interglacial.
The difference between now and warming up from glacial is that we're starting from a much higher baseline, giving the system a much bigger and faster kick, and using CO2 instead of orbital cycles.
It's the same series of an initial forcing (change in insolation due to Milankovitch orbital cycles) being amplified by reinforcing feedbacks (change in albedo, change in temperature and partial pressure regulating both CO2 and H2O), but in reverse from an exit from a glacial period.
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