Slower nutrient stream suppresses Subarctic Atlantic Ocean biological productivity in global warming
Slower nutrient stream suppresses Subarctic Atlantic Ocean biological productivity in global warming
复制标题
在全球变暖过程中,营养物质流变慢抑制了亚北极大西洋的生物生产力
DOI:
10.1073/pnas.2000851117
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Jansen, Malte F.
中科院分区:
文献类型:
--
作者:
Whitt, Daniel B.;Jansen, Malte F.
Earth system models (ESMs) project that global warming suppresses biological productivity in the Subarctic Atlantic Ocean as increasing ocean surface buoyancy suppresses two physical drivers of nutrient supply: vertical mixing and meridional circulation. However, the quantitative sensitivity of productivity to surface buoyancy is uncertain and the relative importance of the physical drivers is unknown. Here, we present a simple predictive theory of how mixing, circulation, and productivity respond to increasing surface buoyancy in 21st-century global warming scenarios. With parameters constrained by observations, the theory suggests that the reduced northward nutrient transport, owing to a slower ocean circulation, explains the majority of the reduced productivity in a warmer climate. The theory also informs present-day biases in a set of ESM simulations as well as the physical underpinnings of their 21st-century projections. Hence, this theoretical understanding can facilitate the development of improved 21st-century projections of marine biogeochemistry and ecosystems.
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DOI:
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发表时间:
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期刊:
影响因子:
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