Global warming has undone 6,500 years of global refrigeration in the past 150 years – Technology News, Firstpost

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Caused mainly by burning fossil fuels, global warming circulates carbon dioxide (CO2), methane and other greenhouse gases in the atmosphere and is leading to the gradual warming of the Earth's surface, oceans and atmosphere.

A new study has emerged suggesting that global warming has brought down six millennia of global cooling in the past 150 years.

The research was published in Nature Research & # 39; s Scientific data, entitled "Average global holocene surface temperature, a multi-method reconstruction approach".

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Protesters simulate a doomsday flood theme to defend urgent climate action. Image courtesy of Greenpeace

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The study's findings show that global cooling began approximately 6,500 years ago, when the long-term average global temperature reached about 0.7 degrees Celsius warmer than in the mid-19th century. Since then, the acceleration of greenhouse gases has contributed to global average temperatures that now exceed one degree Celsius above the mid-19th century.

The study was led by four researchers from the School of Earth and Sustainability at the University of Northern Arizona (SES). They worked in collaboration with scientists from research institutions around the world to reconstruct the average global temperature during the Holocene era – the period after the Ice Age and beginning about 12,000 years ago.

"Previous work has convincingly shown that the world cooled naturally and slowly for at least 1,000 years before the middle of the 19th century, when the average global temperature reversed the course along with the accumulation of greenhouse gases," said Darrell Kaufman, principal author. of the study.

The researchers attributed the slow cycles of global cooling in Earth's orbit, which reduced the amount of summer sunlight in the Northern Hemisphere, culminating in the "Little Ice Age" of the past few centuries.

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According Science Daily, an international group of 93 paleoclimate scientists from 23 countries earlier this year published the most comprehensive set of paleoclimate data ever compiled in the past 12,000 years. They did this by compacting 1,319 data records based on samples taken from 679 locations around the world. As a result, scientists from around the world now have access to the global database.

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"Our future climate will depend to a large extent on the influence of human factors, especially the accumulation of greenhouse gases. However, the future climate will also be influenced by natural factors," said Kaufman.

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