A massive asteroid struck Earth 66 million years ago and
triggered a series of sporadic events that wiped out nearly three fourth of
life living on the planet, including non-avian dinosaurs. It has long been
believed the event, popularly known as the Chicxulub impact, proved
catastrophic for all of life in ways more than one, but if the latest study is
anything to go by, the impact had a much broader and long-lasting effect on
global temperatures.
In the past, scientists have posited the immediate aftermath of the impact resulted in a period of what has been called a “global winter.” Dust and aerosols blocked sunlight and led to a massive decline in global temperatures for a few years. But, that was just the beginning.
As the asteroid crashed into rocks rich in carbonates and triggered massive wildfires around the globe, there was an extensive surge in the carbon dioxide levels prevailing in the atmosphere. So, as the dust and haze cleared and sunlight started reaching the surface of Earth, the greenhouse gas got into action and raised global temperatures. The idea of rising temperatures has also been around for a long time, but the latest work by scientists from the University of Missouri gives us a clearer picture.
Read more here: http://www.ibtimes.com/asteroid-killed-dinosaurs-caused-global-warming-1000-centuries-2684397
The study, titled "Postimpact earliest Paleogene warming shown by fish debris oxygen isotopes (El Kef, Tunisia)," was published May 24 in Science Magazine.
http://science.sciencemag.org/content/early/2018/05/24/science.aap8525
In the past, scientists have posited the immediate aftermath of the impact resulted in a period of what has been called a “global winter.” Dust and aerosols blocked sunlight and led to a massive decline in global temperatures for a few years. But, that was just the beginning.
As the asteroid crashed into rocks rich in carbonates and triggered massive wildfires around the globe, there was an extensive surge in the carbon dioxide levels prevailing in the atmosphere. So, as the dust and haze cleared and sunlight started reaching the surface of Earth, the greenhouse gas got into action and raised global temperatures. The idea of rising temperatures has also been around for a long time, but the latest work by scientists from the University of Missouri gives us a clearer picture.
Read more here: http://www.ibtimes.com/asteroid-killed-dinosaurs-caused-global-warming-1000-centuries-2684397
The study, titled "Postimpact earliest Paleogene warming shown by fish debris oxygen isotopes (El Kef, Tunisia)," was published May 24 in Science Magazine.
http://science.sciencemag.org/content/early/2018/05/24/science.aap8525
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