Atmospheric nourishment of global ocean ecosystems

• 成果类型: Article
• 署名作者: Westberry, T. K.; Behrenfeld, M. J.; Shi, Y. R.; Yu, H.; Remer, L. A.; Bian, H.
• 署名单位: Oregon State University; University System of Maryland; University of Maryland Baltimore County; National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11082
• DOI: 10.1126/science.abq5252
• 发表日期: 2023-05-05
• 页码: 515-519
• 关键词: phytoplankton growth; nutrient-limitation; mineral dust; iron; light; PRODUCTIVITY; acclimation; phosphorus; emissions; DYNAMICS

摘要

Over the vast open ocean, vital nutrients for phytoplankton growth in the sunlit surface layer are largely provided through physical transport from deep waters, but some nutrients are also provided through atmospheric deposition of desert dust. The extent and magnitude of dust-mediated effects on surface ocean ecosystems have been difficult to estimate globally. In this work, we use global satellite ocean color products to demonstrate widespread responses to atmospheric dust deposition across a diverse continuum of phytoplankton nutritional conditions. The observed responses vary regionally, with some areas exhibiting substantial changes in phytoplankton biomass, whereas in other areas, the response reflects a change in physiological status or health. Climate-driven changes in atmospheric aerosols will alter the relative importance of this nutrient source.