气候变化领域集成服务门户(CCPortal): Do Strong Winds Impact Water Mass, Nutrient, and Phytoplankton Distributions in the Ice-Free Canada Basin in the Fall?

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DOI	10.1029/2019JC015428
	Do Strong Winds Impact Water Mass, Nutrient, and Phytoplankton Distributions in the Ice-Free Canada Basin in the Fall?
	Nishino S.; Kawaguchi Y.; Inoue J.; Yamamoto-Kawai M.; Aoyama M.; Harada N.; Kikuchi T.
发表日期	2020
ISSN	21699275
卷号	125 期号:1
英文摘要	In general, strong wind events can enhance ocean turbulent mixing, followed by episodic nutrient supply to the euphotic zone and phytoplankton blooms. However, it is unclear whether such responses to strong winds occur in the ice-free Canada Basin, where the seasonal pycnocline is strong and the nutricline is deep. In the present study, we monitored a fixed-point observation (FPO) station in the Canada Basin for about 3 weeks in the fall of 2014 to examine the oceanic and biological responses to strong winds. At the FPO site, oceanic microstructure measurements, hydrographic surveys, and water sampling were performed with high temporal resolution, recording internal wave propagation, eddy passage, and water mass changes. Strong winds and internal wave propagation significantly enhanced the mixing above and at the seasonal pycnocline, but their effects were diminished at the nutricline, which was much deeper than the seasonal pycnocline. Therefore, wind-induced mixing did not increase the upward nutrient supply from the nutricline and did not impact phytoplankton (chlorophyll a) distribution in the surface layer of the FPO site. The temporal evolution of the chlorophyll a concentration was most closely related to water mass changes. We also observed prominent subsurface chlorophyll a maxima with abundant large-sized phytoplankton that were likely carried by warm-core eddies to the FPO site. Phytoplankton biomass may have been sustained by the high concentration of ammonium within the eddy and ammonium regeneration at the seasonal pycnocline, where particulate organic matter likely accumulated. ©2019. The Authors.
英文关键词	Arctic Ocean; Canada Basin; nutrients; phytoplankton; warm-core eddies; wind forcing
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/187029
作者单位	Institute of Arctic Climate and Environment Research (IACE), Research Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan; National Institute of Polar Research, Tachikawa, Japan; Tokyo University of Marine Science and Technology, Tokyo, Japan; Global Ocean Observation Research Center (GOORC), Research Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan; Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, Tsukuba, Japan; Earth Surface System Research Center (ESS), Research Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
推荐引用方式 GB/T 7714	Nishino S.,Kawaguchi Y.,Inoue J.,et al. Do Strong Winds Impact Water Mass, Nutrient, and Phytoplankton Distributions in the Ice-Free Canada Basin in the Fall?[J],2020,125(1).
APA	Nishino S..,Kawaguchi Y..,Inoue J..,Yamamoto-Kawai M..,Aoyama M..,...&Kikuchi T..(2020).Do Strong Winds Impact Water Mass, Nutrient, and Phytoplankton Distributions in the Ice-Free Canada Basin in the Fall?.Journal of Geophysical Research: Oceans,125(1).
MLA	Nishino S.,et al."Do Strong Winds Impact Water Mass, Nutrient, and Phytoplankton Distributions in the Ice-Free Canada Basin in the Fall?".Journal of Geophysical Research: Oceans 125.1(2020).