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yexuqing木虫之王 (文学泰斗)
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reener green and bluer blue: Ocean poleward greening over the past two decades
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reener green and bluer blue: Ocean poleward greening over the past two decades 更绿的绿，更蓝的蓝：过去二十年海洋极地绿化现象 ▲ 作者：Haipeng Zhao, Manfredi Manizza et al. ▲链接： https://www.science.org/doi/10.1126/science.adr9715 ▲ 摘要：尽管气候变化导致的陆地绿化现象已有充分记载，海洋中的类似趋势却没有被彻底研究。基于卫星观测的海洋叶绿素a（Chl）浓度数据，该研究展示了表层海洋在2003至2022年间呈现显著的向极地绿化趋势。 与此同时，北半球副热带海域叶绿素浓度持续下降。通过构建不平等指数发现，这种叶绿素浓度的纬度差异在过去二十年持续扩大，在北半球表现尤为突出。 水温上升可能是驱动叶绿素变化的主因。这种以海水"更绿的绿，更蓝的蓝"为标志的叶绿素分布失衡现象，可能通过营养级联效应影响高营养级生物，进而对沿海国家渔业与经济产生深远影响。 ▲ Abstract：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. |
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