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TEMPO Interactive, Jakarta - From the analysis of 1.2 million last year, geologist at the University of California Santa Barbara Lorraine Lisiecki claimed to have found a pattern of orderly change in the relationship obit the earth's climate cycles. The findings are reported in the scientific journal Nature Geoscience.

Lisiecki analyze core temperature (core) marine sediments from 57 locations around the world. By analyzing the sediment, scientists can create a chart of the earth's climate over millions of years in the past.

Lisecki linking climate with the historical record of the earth's orbit. He obtained data on the sun orbits the earth changes shape every 100 thousand years. Orbit is better or more oval on the time interval.

The form known as eksentritas orbit. One related aspect is the 41 thousand year cycle in the slope of the axis of the earth. Earth glaciation also occurred every 100 thousand years.

Lesiecki find the time to climate change and eccentricity occur together. »Clear relationship between time changes in the earth's orbit and climate change is strong evidence of the relationship between the two," Lisiecki concluded. »It is not possible that these events would not be related to one another."

In addition to finding the relationship between the change in the form of the orbit and early glaciation, correlation Lisiecki find surprising. He found the largest glacial cycles occur during the change of the weakest in the eccentricity of the orbit of the earth and vice versa.

He found strong changes in the earth's orbit associated with climate change is weak. »This may mean that Earth's climate has internal instability in addition to sensitivity to changes in the orbit," Lisiecki said.

He concluded that the pattern of climatic changes during the last one million years may involve complex interactions between different parts of the climate system, as well as three berebda orbital system, namely obrit eccentricity, tilt, and precession or changes in axis orientation.

ScienceDaily | PURW