The Earth is getting darker

NASA researchers have found that both hemispheres of the Earth are getting darker. The Northern Hemisphere is getting darker at a faster rate.

A new study based on 24 years of NASA satellite surveys has found that Earth is getting darker and there are clear differences between the Northern and Southern Hemispheres. The team looked at data collected by the Clouds and Earth Radiant Energy System (CERES) project, the first phase of which was launched in 1997. Photo: buradaki/shutterstock.com.

“Climate is controlled by the amount of sunlight the Earth absorbs and the amount of infrared energy it emits into space. These quantities, and their differences, make up the Earth's radiation budget (ERB), NASA explains. Photo: DrPixel//Getty Images.

NASA added that the Cloud and Earth Radiant Energy System (CERES) project provides satellite observations of ERBs and clouds. CERES uses measurements from instruments on multiple satellites along with data from other sources to create a comprehensive set of information for climate, weather, and applied science research. Photo: Dr. Pixel/Getty Images.

ERBs are a key driver of ocean and atmospheric circulation, so pinpointing exactly where the Earth is receiving and losing energy is crucial as the climate crisis worsens. When the team analyzed the data in depth, they found that the Earth's albedo (the amount of solar radiation it reflects back into space) is changing. Image: ladbible.

"The circulation of the atmosphere-ocean system is closely linked to the distribution of radiant energy in the climate system. Using satellite observations, the researchers found that while both hemispheres are darkening, the Northern Hemisphere is darkening at a faster rate because it absorbs more solar radiation than the Southern Hemisphere but emits higher amounts of longwave radiation. A range of other factors such as clouds, snow cover and water vapor in the atmosphere all contribute," the research team explained. Photo: Canva.

According to the research team, a series of other factors such as clouds, snow cover and water vapor in the atmosphere all contribute to this effect. Photo: NASA.

Previous studies have suggested that the imbalance between the two hemispheres can be compensated by ocean and atmospheric circulation. However, the new study published in the journal PNAS shows that there are still important differences that ocean and atmospheric circulation cannot compensate for. Photo: warns.

The researchers say the darkening of the Northern Hemisphere relative to the Southern Hemisphere is due to changes in several features, such as radiation-aerosol interactions, surface albedo, and water vapor, which cannot be compensated for by cloud levels. This suggests there is a limit to the role of clouds in maintaining albedo symmetry between the two hemispheres. Photo: Jeremy Horner.

In addition, the research team also found that the Northern Hemisphere is warming more than the Southern Hemisphere and the region's tropics are becoming wetter, suggesting changes in large-scale atmospheric circulation on the planet. Photo: newspaceeconomy.

Experts say further research is needed on the issue and the Northern Hemisphere may continue to warm faster than the Southern Hemisphere and the role of clouds may decrease in redistributing heat around the Earth. Photo: dhapress.

Readers are invited to watch the video : Universe map with more than 900,000 stars, galaxies and black holes. Source: THĐT1.

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