Asian A team of researchers has discovered that during the Pliocene warm period (between 3 and 5 million years) climatic conditions were associated with the phenomenon of 'El Niño'. Experts say that with global warming, these features are repeated in the future, but are not "permanent."
"The variability of 'El Niño' already existed in the warm season Pliocene "SINC Tsuyoshi Watanabe, lead study author and researcher in the Department of History of Natural Sciences of Hokkaido University in Japan. This period occurred about 3 to 5 million years.
Experts believe that the Pliocene warm period met very similar to those recorded in the future with global warming. "The temperatures were on average 2 or 3 º C warmer than now, and concentrations of carbon dioxide (CO2) were higher," says Watanabe.
El Niño is a cyclical climate phenomenon caused by changing patterns movement of ocean currents in the tropics, which causes very different weather as heavy rains or changes in temperature.
"Although the terms of the 'El Niño' is repeated with global warming will not be permanently" said the expert. According to their study, published today in the journal Nature, this phenomenon was not constant during the Pliocene warm periods.
To achieve these results, Asian researchers conducted high-resolution analysis of oxygen isotopes preserved in fossil coral to the western Pacific Ocean, about 3.5 million years old. With these data, experts outlined the seasonal and interannual variability of temperature and sea surface salinity.
"The variability of 'El Niño' already existed in the warm season Pliocene "SINC Tsuyoshi Watanabe, lead study author and researcher in the Department of History of Natural Sciences of Hokkaido University in Japan. This period occurred about 3 to 5 million years.
Experts believe that the Pliocene warm period met very similar to those recorded in the future with global warming. "The temperatures were on average 2 or 3 º C warmer than now, and concentrations of carbon dioxide (CO2) were higher," says Watanabe.
El Niño is a cyclical climate phenomenon caused by changing patterns movement of ocean currents in the tropics, which causes very different weather as heavy rains or changes in temperature.
"Although the terms of the 'El Niño' is repeated with global warming will not be permanently" said the expert. According to their study, published today in the journal Nature, this phenomenon was not constant during the Pliocene warm periods.
To achieve these results, Asian researchers conducted high-resolution analysis of oxygen isotopes preserved in fossil coral to the western Pacific Ocean, about 3.5 million years old. With these data, experts outlined the seasonal and interannual variability of temperature and sea surface salinity.
Source: SINC
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