气候变化领域集成服务门户(CCPortal): Sea Surface Kinetic Energy as a Proxy for Phytoplankton Light Limitation in the Summer Pelagic Southern Ocean

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DOI	10.1029/2019JC015646
	Sea Surface Kinetic Energy as a Proxy for Phytoplankton Light Limitation in the Summer Pelagic Southern Ocean
	Gradone J.C.; Oliver M.J.; Davies A.R.; Moffat C.; Irwin A.
发表日期	2020
ISSN	21699275
卷号	125 期号:3
英文摘要	The pelagic Southern Ocean is a high-nutrient, low-chlorophyll ecosystem. Here, phytoplankton growth is colimited by iron supply and light availability. This creates a general expectation that when light is available in the austral summer (shallow mixing depths), phytoplankton concentrations may be high or low depending on the delivery of iron to the surface layer. When light is not adequate (deep mixing depths), phytoplankton concentrations will likely be low, even if iron is available. Here we show that low surface kinetic energy behaves like a necessary but not sufficient condition for high chlorophyll concentrations. In high kinetic energy conditions, high chlorophyll concentrations are rare. Conversely, under low kinetic energy conditions, both high and low chlorophyll concentrations were observed. We show that higher kinetic energy conditions are related to deeper mixed layers, which is likely a proxy for local light conditions. Probabilistic models of chlorophyll based on surface kinetic energy were able to describe 30% of the spatial variability in monthly chlorophyll climatologies. This means that local light availability, proxied by mixing through kinetic energy, significantly shapes the spatial distribution of chlorophyll in the Southern Ocean. We suggest that regions with consistently higher kinetic energy may not be as sensitive to iron inputs compared to historic iron addition experiments, which were conducted in low surface kinetic energy conditions. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	kinetic energy; phytoplankton blooms; Southern Ocean
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186947
作者单位	School of Marine Science and Policy, University of Delaware, Lewes, DE, United States; Oceanography Department, United States Naval Academy, Annapolis, MD, United States; Department of Mathematics and Statistics, Dalhousie University, Halifax, NS, Canada
推荐引用方式 GB/T 7714	Gradone J.C.,Oliver M.J.,Davies A.R.,et al. Sea Surface Kinetic Energy as a Proxy for Phytoplankton Light Limitation in the Summer Pelagic Southern Ocean[J],2020,125(3).
APA	Gradone J.C.,Oliver M.J.,Davies A.R.,Moffat C.,&Irwin A..(2020).Sea Surface Kinetic Energy as a Proxy for Phytoplankton Light Limitation in the Summer Pelagic Southern Ocean.Journal of Geophysical Research: Oceans,125(3).
MLA	Gradone J.C.,et al."Sea Surface Kinetic Energy as a Proxy for Phytoplankton Light Limitation in the Summer Pelagic Southern Ocean".Journal of Geophysical Research: Oceans 125.3(2020).