A new international study co-authored by researchers at the Cyprus Institute has found that oceans influence cloud formation far more than scientists had previously understood. This groundbreaking discovery is expected to lead to more accurate climate predictions and offers vital insights into long-standing uncertainties in climate science.
The study, published in the prestigious journal Nature, was conducted at the CERN CLOUD experiment, a facility dedicated to studying atmospheric particles and cloud formation. By recreating atmospheric conditions found over remote oceans, researchers investigated the intricate processes through which tiny particles form and grow into the seeds necessary for cloud formation.
Cloud formation: Phytoplankton’s Role in Cloud Dynamics
Central to this research is the role of phytoplankton, microscopic marine organisms that release gases into the atmosphere. These gases undergo chemical reactions that transform them into compounds contributing to new particle formation. Notably, the study highlights the importance of methanesulfonic acid (MSA) produced from natural marine emissions.
Shifting Paradigms in Climate Science
For decades, sulfuric acid was regarded as the primary driver of new particle formation in the atmosphere. However, the new findings indicate that MSA plays a comparably crucial role over remote oceans, especially in low-temperature conditions. When MSA and sulfuric acid work together, they can generate significantly more particles than either compound can alone.
Understanding Climate Systems
Dr Rima Baalbaki, a researcher at the Climate and Atmosphere Research Center of the Cyprus Institute and the first author of the study, emphasised that understanding this mechanism enriches scientists’ comprehension of how the Earth’s climate system functions. It also allows for more precise projections of future climate conditions and a more reliable assessment of the impact of human activities on climate change.
Local Implications in a Warming Region
Dr Theodoros Christoudias, another author of the study, pointed out that Cyprus is situated in a region experiencing warming at twice the global average rate and is already facing severe consequences from climate change. He stated, “This discovery helps us better understand climate systems and better prepare for the impacts of climate change.” The findings have particular significance for the Eastern Mediterranean, one of the world’s most affected climate change hotspots. A deeper understanding of atmospheric processes in this area enhances the ability to model and anticipate future climate conditions.
