Tags: Climate Change | scientists | Milankovitch cycles | orbit variations

Scientists: Orbital Variations Main Cause of Climate Change

By    |   Wednesday, 11 Mar 2015 04:02 PM

Global warming theorists have taken yet another hit with a new study out of Denmark which demonstrates that variations in Earth's orbit are the primary causes of climate change, and have been for at least the last 1.4 billion years.

Scientists from the University of Southern Denmark and the China National Petroleum Corporation investigated marine sediment from the Xiamaling Formation in China and determined that the sediment shows evidence that "the same orbital forcing that caused the climate to change 1.4 billion years ago is the underlying force behind global warming today," the Daily Caller reports.

The research, published in PNAS, states: "There is a wealth of evidence pointing to dramatic short-term climate change on Earth over the last few million years. Much of this climate change is driven by variations of Earth's orbit around the Sun with characteristic frequencies known as Milankovitch cycles."

Milankovitch cycles are fluctuations which occur in Earth's orbit every 20,000, 40,000 and 100,000 years, which bring about an ice age every 100,000 years or so. Currently, Earth is in the middle of a warming period, and has been for the last 11,000 years, Dr.  Donald Canfield, professor at the Nordic Center for Earth Evolution at the university and one of the principle researchers, said, the Daily Caller reported.

"This research will also help us understand how Milankovitch cyclicity ultimately controls climate change on Earth," Canfield said in a statement.

"The way our planet revolves around the sun is the ultimate control knob over the climate," the Daily Caller commented.

The study approximates findings from a study of sea surface temperatures and diatoms, marine algae, from Aarhus University in Denmark. Researcher Marit-Solveig Seidenkrantz commented: "We know that the sun is very important for our climate, but the impact is not clear. Climate change appears to be either strengthened or weakened by solar activity. The extent of the sun's influence over time is thus not constant, but we can now conclude that the climate system is more receptive to the impact of the sun during cold periods, at least in the North Atlantic region," Eureka Alert reported.

Other climate researchers dispute the effect of the sun and Earth orbits on climate change.

Gavin Schmidt, director of NASA's Goddard Institute for Space Studies, told the Daily Caller: "While the ranking of individual years can be affected by chaotic weather patterns, the long-term trends are attributable to drivers of climate change that right now are dominated by human emissions of greenhouse gases" from fossil fuels.

Science 2.0 states: "Natural forces have always caused climate on Earth to fluctuate — sometimes quite a bit. We can't control everything. The Earth is still going to orbit the sun and such orbital forcing of climate change happens over thousands of years and brings ice ages and warming periods."

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Global warming theorists have taken yet another hit with a new study out of Denmark which demonstrates that variations in Earth's orbit are the primary causes of climate change, and have been for at least the last 1.4 billion years.
scientists, Milankovitch cycles, orbit variations
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2015-02-11
Wednesday, 11 Mar 2015 04:02 PM
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