An international research team led by Leipzig University has published findings in the Proceedings of the National Academy of Sciences (PNAS) showing that the green center of the Earth is shifting northeast. The green center represents the area on Earth's surface where green ecosystems are most densely found. This phenomenon is heavily influenced by seasonal changes, as the green levels of vegetation fluctuate northward and southward, creating a 'green wave'. The team discovered that between mid-July and March, the center oscillates between regions north of the equator, notably near Iceland in the North Atlantic, and the coast of Liberia in West Africa.

By analyzing satellite data from 1982 to 2022, researchers noted a consistent northward movement of the green center across all seasons, averaging a shift of 1.9 to 2.4 km per year. After 2010, the pace of this movement accelerated, particularly reaching up to 3.3 km during the Northern Hemisphere summer and 14 km during the Southern Hemisphere summer in February. There is a significant change in the amplitude of this seasonal migration, which could imply alterations in the Earth’s carbon absorption and water release processes, impacting future ecosystems.

The researchers attribute the green center’s movement to climate change, asserting that increased carbon dioxide levels account for about 70% of the observed changes. The satellite data over the past four decades indicating shifts in leaf area and vegetation distribution highlight the deeper implications of climate variability and its impacts on global ecology. Understanding these shifts is essential for addressing climate-related challenges and ecosystems' responses.