Sentences with phrase «ice ages occurred»

But Milankovitch wasn't just interested in tracking changes in sunlight with his model — he wanted to explain why ice ages occurred, why at various times in the history of the Earth glaciers were formed and later melted away.

Moreover, random interactions within the sun's magnetic field can flip the fluctuations from one cycle length to the other, matching the paleo - temperature record for ice ages on Earth for over the past 5.3 million years, when ice ages occurred occurred roughly every 41,000 years until about a million years ago when they switched to a roughly 100,000 - year cycle.

However warm spikes due to high solar output punctuated this cooling trend roughly every thousand years.22 The unprecedented Holocene glacier growth during the Little Ice Age occurred when solar output was extremely low.

Dear Nir Shaviv, I would be glad to receive your comment about the recent paper from Andrew C. Overholt et al 2009 ApJ 705 L101 - L103 doi: 10.1088 / 0004 - 637X / 705 / 2 / L101 TESTING THE LINK BETWEEN TERRESTRIAL CLIMATE CHANGE AND GALA Does it mean - the spiral arm mechanism you suggest does nt fit - can some other mechanism explain your measurements and hypothesis - does this have an impact on the cosmic ray climate theory or not If we talk about the paradox of the faint young sun, imho its still an issue that any mechanism solving the problem of the major ice ages occuring each 140 million years in the last billion, does nt work for the first 3 billion years.

First, the peak of the Carboniferous - Permian ice age occurs 50 Ma after the peak of the galactic cosmic ray flux during a long period of declining cosmic ray flux.

The Little Ice Age occurred world - wide because the sun shines everywhere; only Europeans were advanced enough to record it.

Half of the warming that brought us out of the Wisconsin ice age occurred in less than a decade, the other half took 10,000 years.

Hansen has completely misunderstood how ice ages occur.

PhilC says, \ I have never seen any climate modelling that even includes the fact that ice ages occur or that while they occur the earth doesn't freeze down to -175 C. \

I have never seen any climate modelling that even includes the fact that ice ages occur or that while they occur the earth doesn't freeze down to -175 C.

Much has been mused pro and con regarding the medieval warm period; this seems almost mute when one considers the little ice age occurred between the medieval warm period and the present.

Not exact matches

Documented famines with millions of deaths occurred during the little ice age because the cold weather killed the crops.

And we have it on pretty good authority that the same sort of glacial melting occurred with the last ice age.

Recent research has found evidence that comparable floods occurred much earlier in the Ice Age in the Columbia Basin, as much as 1 to 2 million years ago.

Our study is significant because, while there are various different estimates for the start and end of the Little Ice Age in different regions of the world, our data show that the most extreme phases occurred at the same time in both the Northern and Southern Hemispheres.

«This makes sense because if you go back another million years, ice ages were occurring every 40,000 years.»

Until around 1 million years ago, our planet danced to a faster beat, with the ice age pulses occurring every 40,000 years.

A McGill - led international research team has now completed the first global study of changes that occurred in a crucial component of ocean chemistry, the nitrogen cycle, at the end of the last ice age.

On top of that, explorations occurred during a time of global cooling known as the Little Ice Age, which stretched from the 13th to early 20th centuries.

The overall retreat of several kilometers that has occurred over the past 20,000 years was interrupted by a stillstand or a re-advance of several hundred years at the beginning of the ACR, and then by increasingly minor glacial episodes at the end of the YD, at the beginning of the Holocene (around 10,000 years ago) and during the Little Ice Age (13th to 19th centuries).

About 1.2 million years ago, the sedimentation rate accelerated — the same time that Earth's ice ages began to occur more intensely at 100,000 - year intervals rather than in 40,000 - year cycles.

They said that two extreme climate periods — the Medieval Warming Period between 800 and 1300 and the Little Ice Age of 1300 to 1900 — occurred worldwide, at a time before industrial emissions of greenhouse gases became abundant.

The experiment simulated conditions believed to be the cause of the beveling — the most recent episode of which occurred during the period of deglaciation following the last Ice Age, about 18,000 years ago.

Sudden shifts in climate occurred at the end of the last ice age, according to American researchers studying sediments from the bed of a dry lake in New Mexico.

Today's rate of increase is more than 100 times faster than the increase that occurred when the last ice age ended.

While a soupçon of naturally occurring asphalt on a sidewalk or in a wine cellar is annoying, the substance meant slow, agonizing death for millions of Ice Age creatures.

the last time such an event occurred, the result was an Ice Age known as the Younger Dryas, a period of several thousand years in which England, most of Northern Europe, and the eastern half of North America lay under a blanket of ice and snIce Age known as the Younger Dryas, a period of several thousand years in which England, most of Northern Europe, and the eastern half of North America lay under a blanket of ice and snice and snow.

A minor ice age, the Andean - Saharan, occurred from 460 to 430 million years ago, during the Late Ordovician and the Silurian period.

However, the big unknown remaining is whether corals can adapt to global warming, which is now occurring at an unprecedented rate — at about two orders of magnitude faster than occurred with the ending of the last Ice Age.

Notably, both the decline in sea level and the decline in temperature occurred during the so - called European «Medieval Warm Period,» providing additional evidence that the «Medieval Warm Period» and «Little Ice Age» were not globally synchronous phenomena.

But could such a change, big enough to cause an ice age, occur?

The uplift occurring here is due to present - day melting of glaciers and ice fields formed during the Little Ice Age glacial advance that occurred between 1550 A.D. and 1850 A.D.&raqice fields formed during the Little Ice Age glacial advance that occurred between 1550 A.D. and 1850 A.D.&raqIce Age glacial advance that occurred between 1550 A.D. and 1850 A.D.»

Ice ages have occurred in a hundred thousand year cycle for the last 700 thousand years, and there have been previous periods that appear to have been warmer than the present despite CO2 levels being lower than they are now.

The Little Ice Age (LIA) was a period of cooling that occurred after the Medieval Warm Period.

Ice Age Floods National Geologic Trail — see evidence of the largest and most powerful floods that have ever occurred on Earth.

Stresa is a town and comune of about 5,000 residents on the shores of Lake Maggiore in the province of Verbano - Cusio - Ossola in the Piedmont region of Ice Age Floods National Geologic Trail — see evidence of the largest and most powerful floods that have ever occurred on Earth.

As snow accumulates, each The Little Ice Age (LIA) was a period of cooling that occurred after the Medieval Warm Period.

Presumably you would be just as worried about a naturally occuring plunge into ice age as an anthropogenic rapid warming.

the weather seems to be becoming more extreme, and i'm wondering if / when the weather pendulum will swing so far that this inevitable (mini) ice age i heard about will occur.

As if a rise of 11 F (which, as I understand it from Hansen is likely at least as much as occurred between the last ice age and now) is something to be considered rather trivial!]

Nature does not remain the same with slow and immediate changes occurring, from ice ages to volcanic eruptions.

The coldest years of the so called «Little Ice age» occur around 1600 and are about -0.7 colder than average, with individual years down to -1.2 ºC.

In my print column, I review the research from the Northeast showing that far more intense scouring floods than this event have occurred throughout the period since the end of the last ice age.

In the short video above, Dr. Alley explains how some patterns in the changes that occur during Earth's ice ages and warm intervals (like the last 11,000 years) prove that greenhouse gases exert a warming effect.

The algorithm is based on the Eulerian advection scheme which provides smooth distribution of the ice age parameters and prevents the undersampling problem that may occur when a Lagrangian tracking approach is used.

For the ice age — interglacial variations of the last few million years, a transition occured within the last million years where a 100,000 year timescale seemed to become dominant, whereas previously the variations followed the obliquity (~ 40,000 years) and precession cycles.

Man's role in the extinction of the wooly mammoth and other megafaunal species of the last ice age is smaller compared with the effects of rapid climate - warming events that occurred during the era.

This occurred at the same time as the «Little Ice Age», the coldest period in modern history.

MaggotAtBroadAndWall: Somewhere around 40 % of the modern warming (since the Little Ice Age ended in the 19th century) occurred before man made CO2 was a factor.

Somewhere around 40 % of the modern warming (since the Little Ice Age ended in the 19th century) occurred before man made CO2 was a factor.