Earth’s east–west albedo symmetry

Earth exhibits a consistent east-west albedo symmetry split along the 27° East meridian, according to an analysis of a 25-year satellite record published online on June 3, 2026, in Nature. This symmetry is evident across clear-sky albedo, cloud radiative effect, and the fraction of open ocean, all displaying a triple symmetry pattern centered on this meridian. The findings suggest a fundamental, long-standing characteristic of Earth's climate system that influences how solar radiation is reflected back into space. The study utilized extensive satellite data to identify and quantify this geographical pattern, providing new insights into the planet's energy balance. The persistent nature of this symmetry over a quarter-century indicates it is not a transient phenomenon but rather a stable feature of Earth's climate dynamics. Researchers highlight the importance of understanding such symmetries for improving climate models and predicting future climate changes.