气候变化领域集成服务门户(CCPortal): The Intraseasonal Dynamics of the Mixed Layer Pump in the Subpolar North Atlantic Ocean: A Biogeochemical-Argo Float Approach

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DOI	10.1029/2018GB005997
	The Intraseasonal Dynamics of the Mixed Layer Pump in the Subpolar North Atlantic Ocean: A Biogeochemical-Argo Float Approach
	Lacour L.; Briggs N.; Claustre H.; Ardyna M.; Dall'Olmo G.
发表日期	2019
ISSN	0886-6236
EISSN	1944-9224
起始页码	266
结束页码	281
卷号	33 期号:3
英文摘要	The detrainment of organic matter from the mixed layer, a process known as the mixed layer pump (ML pump), has long been overlooked in carbon export budgets. Recently, the ML pump has been investigated at seasonal scale and appeared to contribute significantly to particulate organic carbon export to the mesopelagic zone, especially at high latitudes where seasonal variations of the mixed layer depth are large. However, the dynamics of the ML pump at intraseasonal scales remains poorly known, mainly because the lack of observational tools suited to studying such dynamics. In the present study, using a dense network of autonomous profiling floats equipped with bio-optical sensors, we captured widespread episodic ML pump-driven export events, during the winter and early spring period, in a large part of the subpolar North Atlantic Ocean. The intraseasonal dynamics of the ML pump exports fresh organic material to depth (basin-scale average up to 55 mg C·m−2·day−1), providing a significant source of energy to the mesopelagic food web before the spring bloom period. This mechanism may sustain the seasonal development of overwintering organisms such as copepods with potential impact on the characteristics of the forthcoming spring phytoplankton bloom through predator-prey interactions. © 2019. American Geophysical Union. All Rights Reserved.
语种	英语
scopus关键词	algal bloom; biogeochemical cycle; carbon budget; food web; mixed layer; phytoplankton; predator-prey interaction; seasonal variation; sensor; Atlantic Ocean; Atlantic Ocean (North); Copepoda
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129740
作者单位	Sorbonne Universitée, CNRS, Laboratoire d'Océanographie de Villefranche, LOV, Villefranche-sur-mer, France; Now at Takuvik Joint International Laboratory, CNRS and Université Laval, Québec City, QC, Canada; National Oceanography Centre, European Way, Southampton, United Kingdom; Department of Earth System Science, Stanford University, Stanford, CA, United States; Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, United Kingdom; National Centre for Earth Observation, Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, United Kingdom
推荐引用方式 GB/T 7714	Lacour L.,Briggs N.,Claustre H.,et al. The Intraseasonal Dynamics of the Mixed Layer Pump in the Subpolar North Atlantic Ocean: A Biogeochemical-Argo Float Approach[J],2019,33(3).
APA	Lacour L.,Briggs N.,Claustre H.,Ardyna M.,&Dall'Olmo G..(2019).The Intraseasonal Dynamics of the Mixed Layer Pump in the Subpolar North Atlantic Ocean: A Biogeochemical-Argo Float Approach.Global Biogeochemical Cycles,33(3).
MLA	Lacour L.,et al."The Intraseasonal Dynamics of the Mixed Layer Pump in the Subpolar North Atlantic Ocean: A Biogeochemical-Argo Float Approach".Global Biogeochemical Cycles 33.3(2019).