Tuesday , October 26 2021

“This is pretty worrying”: Scientists are discovering that the Earth shone less than 20 years ago



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Published:

October 6, 2021 10:17 GMT

Most of the decline has occurred in the last 3 years in Earth light data.

Ocean water warming has caused a decrease in the brightness of the Earth, a recent study published in Geophysical Research Letters showed.

Researchers have been measuring terrestrial light, light reflected by the Earth and illuminating the surface of the Moon, and satellite measurements for decades to find that significant reduction in repulsionor the albedo of the Earth in the last two decades.

The earth is now reflected around half a watt less light per square meter than 20 years ago, and the biggest decline has occurred in the last 3 years according to Earth light data.

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“The drop in albedo surprised us greatly when we looked at the last three years of data after 17 years of almost flat albedo,” said Philip Goode, a researcher at the New Jersey Institute of Technology and lead author of the new study. , which refers to data on Earth’s luminosity from 1998 to 2017 collected by the Big Bear Solar Observatory in Southern California.

Specifically, the researchers point out that there was a decrease in bright, reflective low-lying clouds over the eastern Pacific Ocean in recent years based on satellite measurements carried out under the NASA Clouds and Earth Radiant Energy System (CERES) project.

This is the same area off the west coast of North and South America where sea surface temperatures have risen due to a reversal of climate conditions called the ‘Pacific Decade’, with likely links to global climate change.

“It’s pretty disturbing”said Edward Schwieterman, a scientist at the University of California, Riverside, who was not included in the study last week. Many scientists have hoped for some time that a warmer Earth could cause more clouds and a higher albedo, which would help moderate warming and balance the climate system, “but that shows otherwise,” he added.

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