Scientists have discovered that oceans play a more significant role in cooling the Earth than previously thought. A new study published in Science Advances reveals that a sulfur gas produced by marine life, known as methanethiol, enhances the planet’s cooling effect. Researchers found that microscopic plankton living on the surface of the oceans emit dimethyl sulfide, a type of sulfur gas.
When this gas reaches the atmosphere, it oxidizes and produces small particles called aerosols, which reflect solar radiation back into space, reducing the heat on Earth. Plankton also releases methanethiol, further amplifying this cooling effect. Dr.
Charel Wohl, a researcher at the University of East Anglia’s Centre for Ocean and Atmospheric Sciences, explains, “This is the climatic element with the greatest cooling capacity, but also the least understood.
Ocean sulfur’s cooling role
We knew methanethiol was coming out of the ocean, but we had no idea about how much and where.
We also did not know it had such an impact.”
The study quantified the amount of methanethiol released into clouds over the Southern Ocean and observed a more significant cooling impact on the climate than previously expected. This works in opposition to greenhouse gases such as carbon dioxide and methane, which absorb heat. Dr.
Julián Villamayor, a researcher at the Blas Cabrera Institute of Physical Chemistry in Spain, notes, “It may not seem like much, but methanethiol is more efficient at oxidizing and forming aerosols than dimethyl sulfide and, therefore, its climate impact is magnified.”
The impact of methanethiol is more visible in the Southern Hemisphere, where there are more oceans and fewer human activities burning fossil fuels. However, the authors emphasize that human behavior will ultimately determine whether the planet continues to warm. The discovery of methanethiol’s role in cooling the Earth will help create more accurate climate models and provide another tool to slow global warming.
As scientists continue to study the complex interactions between the oceans and the atmosphere, a deeper understanding of these natural processes may lead to more effective strategies for mitigating the effects of climate change.
April Isaacs is a news contributor for DevX.com She is long-term, self-proclaimed nerd. She loves all things tech and computers and still has her first Dreamcast system. It is lovingly named Joni, after Joni Mitchell.
