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Home / Science / A dino-killing asteroid has caused the Earth to heat up for 10,000 years

A dino-killing asteroid has caused the Earth to heat up for 10,000 years



WASHINGTON: The asteroid Chicchulub, which caused the extinction of dinosaurs, spurred a long era of global warming when it penetrated the Earth 65 million years ago, with a rapid rise in temperature of 5 degrees Celsius, which held about 1. 00,000 years, a study has found.

The monumental event is a rare event in which Earth's systems were disturbed at a faster rate than today through human activity.

It provides valuable insights into what can happen in the event of sudden extreme environmental changes.

The aftermath of the Chicxulub strike remains controversial and some scientists argue that soot in the atmosphere blocks the sun sufficiently to drive global cooling.

Others suggest that carbon released from the earth's crust into the atmosphere when the asteroid is impacted, as well as carbon from forest fires, has a warming effect.

To better understand how the temperature changed during that time, researchers ̵

1; including the University of Missouri and the University of Colorado Boulder in the US – analyzed a robust collection of well-preserved, sand-grain-sized remnants of fish teeth and bones from one Location in Tunisia.

These samples contain oxygen isotope signatures indicating the temperature at the time the related animal was living.

The researchers were able to collect samples from sediments that lasted until the Chicxulub impact until well after.

Based on their analysis, they suggest that global temperatures rose by about 5 degrees Celsius and could not cool down to their previous levels about 1,000,000 years after impact, a magnitude and duration of warming that closely correlated with Types of analyzes estimated to be matched by carbon dioxide were emitted during the same period.


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