Greener green and bluer blue: Ocean poleward greening over the past two decades

• 成果类型: Article
• 署名作者: Zhao, Haipeng; Manizza, Manfredi; Lozier, M. Susan; Cassar, Nicolas
• 署名单位: Duke University; University of California System; University of California San Diego; Scripps Institution of Oceanography; University System of Georgia; Georgia Institute of Technology
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-10322
• DOI: 10.1126/science.adr9715
• 发表日期: 2025-06-19
• 页码: 1337-1340
• 关键词: climate-change; global ocean; WORLD; PRODUCTIVITY; chlorophyll; TRENDS

摘要

Although the global greening associated with climate change is well documented on land, similar trends in the ocean have not been thoroughly identified. Using satellite observations of ocean chlorophyll a (Chl) concentration, we show that the surface ocean experienced a poleward greening from 2003 to 2022. Contemporaneously, the subtropical regions of the Northern Hemisphere experienced a decrease in Chl. As such, the latitudinal disparity in Chl, as documented by an inequality index, has been increasing over the past two decades, particularly in the Northern Hemisphere. Rising water temperatures may primarily influence the Chl trends. The increasing Chl inequality-marked by greener green and bluer blue waters-has the potential to cascade to higher trophic levels, with implications for the fisheries and economies of coastal nations.