The past ten ice ages have been cycling at 100 thousand year intervals. Environmental influences would not be so cyclic. Hot spots rotating in the earth’s core seem to be the best explanation.
Warm ocean currents are melting ice at the poles and damaging coral reefs. It’s primarily ocean temperatures that are increasing, and secondarily air temperatures.
Rainfall is greatly increasing in the upper plains (of USA). That moisture originates with evaporation of the Pacific Ocean, which must be heating up.
Atmospheric temperature is over-played in the hype on global warming.
Change in air temperature is not of much significance at even moderate levels, let alone the minute levels being questioned. The reason is because air has very low heat capacity.
Increases in temperatures below the ground surface have recently been detected. This includes unusual melting of ice on lakes in Minnesota.
Increases in CO2 in the atmosphere have been occurring for about a century. But only about 3% of the CO2 has human origins. A likely source of the increase is heating of oceans, which causes CO2 to be released.
Heating of oceans appears to be the cause of ice ages. Increased evaporation would create more cloud cover and reduce radiant heating.
Evidence for cloud cover causing ice ages is in the albedo effect, which means reflection of radiation. Ocean levels drop 300-400 feet during ice ages. They expose more land than is covered by ice. And much of it is in tropical zones which have intense radiation.
Therefore, if the sun’s radiation were getting to the earth’s surface during an ice age, it would create more atmospheric heat than usual, not less. This indicates that radiation is blocked out during ice ages. Since cool-down occurs for about 80 thousand years, only cloud cover would block radiation that long, not dust or gases from asteroids or geological events.
The most likely cause of oceans being heated is hot spots cycling in the earth’s core. A very significant point of evidence is that recent ice ages have been cycling at 100 thousand year intervals. Environmental causes would not be so consistent. But convection in the earth’s core could produce very precise repetitious cycles.
A lot of heat from the earth’s core gets to the surface, as indicated by deep wells which produce warm water. Oceans are deeper than deep water wells. So the oceans are picking up a lot of heat from the earth’s core. Any increase, and an ice age would surely be the result.
Model of Ice Age: As oceans are heated due to hot spots rotating in the earth’s core, precipitation increases, air temperatures increase slightly, and atmospheric carbon dioxide increases. This state continues for a few centuries, until a trigger mechanism reverses the temperatures. The trigger is probably a large volcanoe, which cools the earth’s surface. This results in much winter snow, which does not melt during the summer. The snow reflects much radiation during the summer creating a precipitous decline in temperatures. The cold temperatures and snow then continue for eighty thousand years, until the oceans get so low that they expose a large amount of land mass, which causes heat-up to occur.
News Article – The last weather ship in the world lies anchored in a severe and lonely place in the Norwegian Sea. Since 1948, its crews have taken water temperatures to produce the longest continuous set of deep-ocean data available. After about 4 decades, those data revealed a dramatic, persistent rise in the temperature 2,000 meters deep. Is it a sign of a fundamental change in deep-ocean circulation? Of global climate change? Uwe Send, an oceanographer at the University of Kiel in Germany, says no one knows. “The problem is, we don’t have this information but in a very few places in the ocean,” he says.
Copyright by Gary Novak.
All Rights Reserved.
There is more information in libraries than on the internet concerning ice ages.
Subject related book on ice ages:
Ice Ages, Past and Future by Jon Erickson, 1990, Tab Books.