globalchange  > 气候变化与战略
DOI: 10.1029/2018GB005997
论文题名:
The Intraseasonal Dynamics of the Mixed Layer Pump in the Subpolar North Atlantic Ocean: A Biogeochemical-Argo Float Approach
作者: Lacour L.; Briggs N.; Claustre H.; Ardyna M.; Dall'Olmo G.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2019
卷: 33, 期:3
语种: 英语
英文关键词: algal bloom ; biogeochemical cycle ; carbon budget ; food web ; mixed layer ; phytoplankton ; predator-prey interaction ; seasonal variation ; sensor ; Atlantic Ocean ; Atlantic Ocean (North) ; Copepoda
中文摘要: 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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160143
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Global Biogeochemical Cycles,2019-01-01,33(3)
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