Southern Ocean biological impacts on global ocean oxygen

被引：24

作者：

Keller, David P. ^{[1
]}

Kriest, Iris ^{[1
]}

Koeve, Wolfgang ^{[1
]}

Oschlies, Andreas ^{[1
]}

机构：

[1] GEOMAR Helmholtz Zentrum Ozeanforsch Kiel, Kiel, Germany

来源：

GEOPHYSICAL RESEARCH LETTERS | 2016年 / 43卷 / 12期

关键词：

SYSTEM CLIMATE MODEL; MINIMUM ZONES; IRON FERTILIZATION; ATMOSPHERIC CO2; PACIFIC-OCEAN; DEEP-OCEAN; CIRCULATION; 21ST-CENTURY; PRODUCTIVITY; VARIABILITY;

D O I：

10.1002/2016GL069630

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Southern Ocean (SO) physical and biological processes are known to have a large impact on global biogeochemistry. However, the role that SO biology plays in determining ocean oxygen concentrations is not completely understood. These dynamics are investigated here by shutting off SO biology in two marine biogeochemical models. The results suggest that SO biological processes reduce the ocean's oxygen content, mainly in the deep ocean, by 14 to 19%. However, since these processes also trap nutrients that would otherwise be transported northward to fuel productivity and subsequent organic matter export, consumption, and the accompanying oxygen consumption in midlatitude to low-latitude waters, SO biology helps to maintain higher oxygen concentrations in these subsurface waters. Thereby, SO biology can influence the size of the tropical oxygen minimum zones. As a result of ocean circulation the link between SO biological processes and remote oxygen changes operates on decadal to centennial time scales.

引用

页码：6469 / 6477

页数：9

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