High-resolution physical–biogeochemical structure of a filament and an eddy of upwelled water off northwest Africa
作者: Wilken-Jon von AppenVolker H. StrassAstrid BracherHongyan XiCora HörstmannMorten H. IversenAnya M. Waite
作者单位: 1Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany
2Department of Oceanography and the Ocean Frontier Institute, Dalhousie University, Halifax, Nova Scotia, Canada
刊名: Ocean Science, 2020, Vol.16 (1), pp.253-270
来源数据库: Copernicus Journal
DOI: 10.5194/os-16-253-2020
原始语种摘要: Nutrient-rich water upwells offshore of northwest Africa and is subsequently advected westwards. There it forms eddies and filaments with a rich spatial structure of physical and biological/biogeochemical properties. Here we present a high-resolution (2.5 km) section through upwelling filaments and an eddy obtained in May 2018 with a TRIAXUS towed vehicle equipped with various oceanographic sensors. Physical processes at the mesoscale and submesoscale such as symmetric instability, trapping of fluid in eddies, and subduction of low potential vorticity (which we use as a water mass tracer) water can explain the observed distribution of biological production and export. We found a nitrate excess (higher concentrations of nitrate than expected from oxygen values if only influenced by...
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  • concentrations 浓聚物
  • biological 生物学的
  • water 
  • physical 物理的
  • nitrate 硝酸盐
  • northwest 
  • oceanographic 海洋的
  • excess 超量
  • filament 灯丝
  • values 价值观