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DOI | 10.1073/pnas.1900789116 |
Climate-driven oscillation of phosphorus and iron limitation in the North Pacific Subtropical Gyre | |
Letelier, Ricardo M.1; Bjorkman, Karin M.2,3; Church, Matthew J.4; Hamilton, Douglas S.5; Mahowald, Natalie M.5; Scanza, Rachel A.5,7; Schneider, Niklas3,6; White, Angelicque E.2,3; Karl, David M.2,3 | |
发表日期 | 2019 |
ISSN | 0027-8424 |
卷号 | 116期号:26页码:12720-12728 |
英文摘要 | The supply of nutrients is a fundamental regulator of ocean productivity and carbon sequestration. Nutrient sources, sinks, residence times, and elemental ratios vary over broad scales, including those resulting from climate-driven changes in upper water column stratification, advection, and the deposition of atmospheric dust. These changes can alter the proximate elemental control of ecosystem productivity with cascading ecological effects and impacts on carbon sequestration. Here, we report multi-decadal observations revealing that the ecosystem in the eastern region of the North Pacific Subtropical Gyre (NPSG) oscillates on subdecadal scales between inorganic phosphorus (Pi) sufficiency and limitation, when Pi concentration in surface waters decreases below 50-60 nmol.kg(-1). In situ observations and model simulations suggest that sea-level pressure changes over the northwest Pacific may induce basin-scale variations in the atmospheric transport and deposition of Asian dust-associated iron (Fe), causing the eastern portion of the NPSG ecosystem to shift between states of Fe and Pi limitation. Our results highlight the critical need to include both atmospheric and ocean circulation variability when modeling the response of open ocean pelagic ecosystems under future climate change scenarios. |
WOS研究方向 | Science & Technology - Other Topics |
来源期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/99290 |
作者单位 | 1.Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA; 2.Univ Hawaii Manoa, Daniel K Inouye Ctr Microbial Oceanog Res & Educ, Honolulu, HI 96822 USA; 3.Univ Hawaii Manoa, Dept Oceanog, Honolulu, HI 96822 USA; 4.Univ Montana, Flathead Lake Biol Stn, Polson, MT 59860 USA; 5.Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY 14850 USA; 6.Univ Hawaii Manoa, Int Pacific Res Ctr, Honolulu, HI 96822 USA; 7.Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99354 USA |
推荐引用方式 GB/T 7714 | Letelier, Ricardo M.,Bjorkman, Karin M.,Church, Matthew J.,et al. Climate-driven oscillation of phosphorus and iron limitation in the North Pacific Subtropical Gyre[J],2019,116(26):12720-12728. |
APA | Letelier, Ricardo M..,Bjorkman, Karin M..,Church, Matthew J..,Hamilton, Douglas S..,Mahowald, Natalie M..,...&Karl, David M..(2019).Climate-driven oscillation of phosphorus and iron limitation in the North Pacific Subtropical Gyre.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(26),12720-12728. |
MLA | Letelier, Ricardo M.,et al."Climate-driven oscillation of phosphorus and iron limitation in the North Pacific Subtropical Gyre".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.26(2019):12720-12728. |
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