植物浮游生物度的变化导致北极海洋的初级产量增加
K M Lewis1, G L van Dijken1, K R Arrigo2
1Department of Earth System Science, Stanford University, Stanford, CA 94305, USA.
Science (New York, N.Y.)
|July 11, 2020
概括
由于海冰的消失, 北极植物浮游生物的初级产量增加了57%. 未来的增长可能是由营养物质流入和浮游生物质推动的,支持更高的食量水平和碳出口.
科学领域:
- 海洋学
- 海洋生物学
- 气候科学
背景情况:
- 在历史上,北极海冰的减少与植物浮游生物的初级产量增加有关.
- 海冰持续减少对北极原始产量的长期影响仍在争论中.
- 了解这些变化对于预测北极生态系统的反应至关重要.
研究的目的:
- 量化北极原始产量的变化.
- 鉴定因海冰流失而发生的初级产量变化的驱动因素
- 预测北极海洋在未来能够支持更高的热量水平和碳出口.
主要方法:
- 使用专门为北极海洋参数化的海洋颜色算法.
- 分析了1998年至2018年的卫星数据,以评估初级生产趋势.
- 研究了海冰范围,浮游生物质和营养素的可用性之间的关系.
主要成果:
- 在1998年至2018年间,北极原始产量增加了57%.
- 早期的增长与海冰损失导致的开放水域增加有关.
- 后来的增长主要是由增强的浮游生物质驱动的,由新的营养物质流入维持.
结论:
- 北极的初级生产对海冰的动态和营养的可用性很敏感.
- 北极海洋可能在未来支持更高的食量生产和碳出口.
- 持续监测对于了解不断发展的北极海洋生态系统至关重要.
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