SCEINCE

Our atmosphere is changing. And that makes the Earth darker

New research reveals this climate change makes the Earth less reflective according to paper published iin the diary Letters for geophysical research.

“Earth’s reflection is a major climatic parameter that we measured from the Ursa Major Solar Observatory between 1998 and 2017, observing the Earth’s brightness using modern photometric techniques to accurately determine daily, monthly, seasonal, annual and decimal changes in the Earth’s. albedo of earthly brilliance. “, The researchers wrote in their report. “We are measuring gradually but climatologically significant ~ 0.5 W / m2 decline in the global albedo for the two decades of data. “

The reflection of the Earth is an essential determinant of the earth’s climate, as climate change results from the simultaneous evolution of solar intensity, the earth’s albedo, and greenhouse isolation.

To reach their conclusion, sScientists reviewed data from the Big Bear Solar Observatory in Southern California and assessed how the Earth’s luminosity has fluctuated since 1998. They then combined these data with observations from NASA. Clouds and Radiation on Earth (CERES) a project that has been active since 1997 and with instruments from several satellites of NASA and the National Oceanic and Atmospheric Administration (NOAA).

It should be noted that most of the changes in the impact have occurred in the last year, which shows that the effects of climate change are growing exponentially. Researchers attribute this development mainly to a change in the clouds.

Clouds are extremely difficult to study because scientists do not fully understand their relationship to terrestrial elements. However, in this study, researchers attributed the reduction in cloud reflection over the Pacific Ocean.

Clouds are known to reflect about half of the sunlight that hits them snow and ice falling from the clouds reflect most of the light they receive. What do these new discoveries mean for our planet and climate change? Scientists are too early to draw conclusions, but we can imagine that any change caused by global warming would cause concern.





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