Ice Age.

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neverfail
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Re: Ice Age.

Post by neverfail » Wed Jun 14, 2017 3:27 am

Doc wrote:
Tue Jun 13, 2017 8:08 pm
neverfail wrote:
Tue Jun 13, 2017 5:38 pm
Doc wrote:
Tue Jun 13, 2017 6:38 am

The Earth's BIGGEST ice Age (note the singular) nearly ended life on the Earth.

https://en.wikipedia.org/wiki/Huronian_glaciation
Very well Doc. But you realise this earlier Ice Age that occurred at the birth of terrestrial life is outside the terms of reference with which I began this discussion, don't you?
My point is it is in the winds and the currents as much as anything.
(quote from your provided link above): Before the Huronian Ice Age, most organisms were anaerobic, but around this time, the cyanobacteria evolved photosynthesis. These bacteria were able to reproduce at exponential rates due to their new ecological niche, exploiting the near-limitless energy of the sunlight. Their photosynthesis produced oxygen as a waste product expelled into the air. At first, most of this oxygen was absorbed through the oxidization of surface iron and the decomposition of life forms. However, as the population of the cyanobacteria continued to grow, these oxygen sinks became saturated.[3] This led to a mass extinction of most life forms, which were anaerobic, as oxygen was toxic to them. As oxygen "polluted" the mostly methane atmosphere, and methane bonded with oxygen to form carbon dioxide and water, a different, thinner atmosphere emerged, and Earth began to lose heat. Thus began the Huronian Ice Age.

No mention of winds and currents as the cause of this earliest ice age Doc. I concede though that winds and currents did likiely play an auxiliary role in perpetuating the more recent serial ice ages.

neverfail
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Re: Antarctica: an Ice Age without end?

Post by neverfail » Wed Jun 14, 2017 3:52 am

https://www.google.com.au/search?q=when ... e&ie=UTF-8

How much ice is in the Antarctic?
The Antarctic ice sheet is the largest single mass of ice on Earth. It covers an area of almost 14 million square km and contains 30 million cubic km of ice. Around 90 percent of the fresh water on the Earth's surface is held in the ice sheet, an amount equivalent to 70 m of water in the world's oceans.


Lord help us all should global warming cause it to melt.

How was the Antarctic formed?
It is believed that the reduction in Earth's carbon dioxide levels, as well as changes in its orbit, caused a high degree of cooling. This, in combination with the formation of the Antarctic Circumpolar Current, formed glaciers on the landmass, which grew sizably and carved deep valleys in the landscape.


Warm water from the tropics never reaches this icy continent. Unlike the Arctic Sea which gets the residue of warmth from the North Atlantic Drift.

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Doc
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Re: Ice Age.

Post by Doc » Wed Jun 14, 2017 7:12 am

neverfail wrote:
Wed Jun 14, 2017 3:27 am
Doc wrote:
Tue Jun 13, 2017 8:08 pm
neverfail wrote:
Tue Jun 13, 2017 5:38 pm
Doc wrote:
Tue Jun 13, 2017 6:38 am

The Earth's BIGGEST ice Age (note the singular) nearly ended life on the Earth.

https://en.wikipedia.org/wiki/Huronian_glaciation
Very well Doc. But you realise this earlier Ice Age that occurred at the birth of terrestrial life is outside the terms of reference with which I began this discussion, don't you?
My point is it is in the winds and the currents as much as anything.
(quote from your provided link above): Before the Huronian Ice Age, most organisms were anaerobic, but around this time, the cyanobacteria evolved photosynthesis. These bacteria were able to reproduce at exponential rates due to their new ecological niche, exploiting the near-limitless energy of the sunlight. Their photosynthesis produced oxygen as a waste product expelled into the air. At first, most of this oxygen was absorbed through the oxidization of surface iron and the decomposition of life forms. However, as the population of the cyanobacteria continued to grow, these oxygen sinks became saturated.[3] This led to a mass extinction of most life forms, which were anaerobic, as oxygen was toxic to them. As oxygen "polluted" the mostly methane atmosphere, and methane bonded with oxygen to form carbon dioxide and water, a different, thinner atmosphere emerged, and Earth began to lose heat. Thus began the Huronian Ice Age.

No mention of winds and currents as the cause of this earliest ice age Doc. I concede though that winds and currents did likiely play an auxiliary role in perpetuating the more recent serial ice ages.
"as much as anything."
The distribution of heat and cold is what drives the weather to equalize the temperature. Preventing that from happening can cause large areas to be covered with snow which reflects heat back into space.
“"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros

neverfail
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Re: Ice Age.

Post by neverfail » Thu Jun 15, 2017 12:58 am

Doc wrote:
Tue Jun 13, 2017 8:08 pm


The distribution of heat and cold is what drives the weather to equalize the temperature. Preventing that from happening can cause large areas to be covered with snow which reflects heat back into space.
Agreed! But something has to cause it to become permanent in the first place.

After all, annually most of North America and northern Eurasia alike get covered for months on end with snowfall, yet the resultant reflection of heat back into space has been insufficient to bring on a new ice age.

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Re: Ice Age.

Post by Doc » Thu Jun 15, 2017 2:49 am

neverfail wrote:
Thu Jun 15, 2017 12:58 am
Doc wrote:
Tue Jun 13, 2017 8:08 pm


The distribution of heat and cold is what drives the weather to equalize the temperature. Preventing that from happening can cause large areas to be covered with snow which reflects heat back into space.
Agreed! But something has to cause it to become permanent in the first place.

After all, annually most of North America and northern Eurasia alike get covered for months on end with snowfall, yet the resultant reflection of heat back into space has been insufficient to bring on a new ice age.
I think it is at the point that snow is on the ground all year down to the lower to upper lower parts of Canada and Asia that is when the ICE kicks in. BTW DId you know that hotter weather shifts the rain belts further north and precipitation is more likely to fall as snow?
“"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros

neverfail
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Re: Ice Age.

Post by neverfail » Thu Jun 15, 2017 7:23 am

Doc wrote:
Thu Jun 15, 2017 2:49 am


I think it is at the point that snow is on the ground all year down to the lower to upper lower parts of Canada and Asia that is when the ICE kicks in. BTW DId you know that hotter weather shifts the rain belts further north and precipitation is more likely to fall as snow?
But if the polar regions are getting warmer too, does that not mean that the rain is more likely to fall as rain instead of snow even in those parts?

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Doc
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Re: Ice Age.

Post by Doc » Thu Jun 15, 2017 10:57 am

neverfail wrote:
Thu Jun 15, 2017 7:23 am
Doc wrote:
Thu Jun 15, 2017 2:49 am


I think it is at the point that snow is on the ground all year down to the lower to upper lower parts of Canada and Asia that is when the ICE kicks in. BTW DId you know that hotter weather shifts the rain belts further north and precipitation is more likely to fall as snow?
But if the polar regions are getting warmer too, does that not mean that the rain is more likely to fall as rain instead of snow even in those parts?
I am getting this from my College Geo Prof. The rain belts shifting is not a 1:1 relation to how much more northern temps rise. Plus if you get a mix of first heavy snow cover then rain then freezing conditions, the resulting ice tends to stick around much longer than just snow would
“"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros

neverfail
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Re: Ice Age.

Post by neverfail » Tue Jun 20, 2017 4:32 am

Doc wrote:
Thu Jun 15, 2017 10:57 am


I am getting this from my College Geo Prof. The rain belts shifting is not a 1:1 relation to how much more northern temps rise. Plus if you get a mix of first heavy snow cover then rain then freezing conditions, the resulting ice tends to stick around much longer than just snow would
I can see your (and his?) point doc. Do you view global warming as contributing to the northern drift of the rains?

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Re: Ice Age.

Post by Doc » Tue Jun 20, 2017 2:43 pm

neverfail wrote:
Tue Jun 20, 2017 4:32 am
Doc wrote:
Thu Jun 15, 2017 10:57 am


I am getting this from my College Geo Prof. The rain belts shifting is not a 1:1 relation to how much more northern temps rise. Plus if you get a mix of first heavy snow cover then rain then freezing conditions, the resulting ice tends to stick around much longer than just snow would
I can see your (and his?) point doc. Do you view global warming as contributing to the northern drift of the rains?
Global Warming and cooling have an effect on drift north or south on the rain belts. BTW another thought - Cloudy skies block sunlight. Meaning less snow melt.
“"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros

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Re: Ice Age.

Post by Doc » Fri Nov 23, 2018 10:07 am

In case anyone is wondering, I could use a good pair of gloves for Christmas

https://www.zerohedge.com/news/2018-11- ... ecord-cold
'Mini Ice Age' Looms As NASA Scientist Warns Lack Of Sunspots Could Bring Record Cold



“The sun is entering one of the deepest Solar Minima of the Space Age,” wrote Dr. Tony Phillips just six weeks ago, on September 27, 2018. The lack of sunspots on our sun could bring about record cold temperatures, and perhaps even a mini ice age.

Our sun was not expected to head into a solar minimum until around 2020, but it appears to be heading in that direction a little early which could prove to be bad news for warm weather lovers.

But a prolonged solar minimum could mean a “mini ice age.” The last time there was a prolonged solar minimum, it did, in fact, lead to a mini ice-age which was scientifically known as the Maunder minimum

SHTFplan.com's Mac Slavo writes that sunspots have been absent for most of 2018 and Earth’s upper atmosphere is responding, says Phillips, the editor of spaceweather.com.

“The bad news,” according to Phillips, is:

“It also delays the natural decay of space junk, resulting in a more cluttered environment around Earth.”

“It could happen in a matter of months,” says Martin Mlynczak of NASA’s Langley Research Center on the cold snap that may be coming.

“If current trends continue, it could soon set a Space Age record for cold,” says Mlynczak. “We’re not there quite yet,” he said. However, “months” is not all that far away.

Data from NASA’s TIMED (Thermosphere Ionosphere Mesosphere Energetics and Dynamics) satellite shows that the thermosphere (the uppermost layer of air around our planet) is cooling and shrinking, literally decreasing the radius of the atmosphere. This reduction of solar activity could result in a global cooling phase.

“The thermosphere always cools off during Solar Minimum. It’s one of the most important ways the solar cycle affects our planet,” said Mlynczak, according to The New American.

The new NASA findings are in line with studies released by UC-San Diego and Northumbria University in Great Britain last year, both of which predict aGrand Solar Minimum in coming decades due to low sunspot activity.
“"I fancied myself as some kind of god....It is a sort of disease when you consider yourself some kind of god, the creator of everything, but I feel comfortable about it now since I began to live it out.” -- George Soros

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