Collaborative Research: Impact of Langmuir Circulation on Gas Transfer and Photosynthesis in the Southern Ocean: A Large Eddy Simulation Study

合作研究：朗缪尔环流对南大洋气体传输和光合作用的影响：大涡模拟研究

• 批准号: 0839011
• 负责人: Patrick Neale
• 金额: $ 14.69万
• 依托单位: Smithsonian Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-01 至 2012-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0839011&HistoricalAwards=false
• 关键词: Collaborative; Research; Impact; Langmuir; Circulation

Langmuir circulation (LC) in the upper ocean mixed layer (UOML) is a feature most familiarly observed as linear stripes or sea surface streaks approximately parallel to the wind direction. These result from helical (ovoid) water cells rotating clockwise and anticlockwise, forming alternating bands of convergence (downwelling) and divergence (upwelling) at the surface. Windspeed determines the depth and the spacings of these circulation cells. As a driver of surface renewal in the UOML, LC may then be responsible for processes such as divergence zone capture and transport of phytoplankton upwards to the surface and the convergence zone collection and sinking of surfactants and transferable gases into the water column. Investigators from the University of South Florida and the Smithsonian Research Center wish to extend numerical modeling studies of the effects of LC on two topics of interest to Antarctic oceanography, firstly, a) photoinhibition of the primary productivity of phytoplankton under Antarctic summer light fields (including effects of surface UV penetration) and possibly, b) parameterizations of sea-air gas exchange. Two recent field data sets including productivity studies in the Ross Sea polyna and the Southern Ocean Gas Experiment (SO-GasEx) will form the basis for comparisons of field data with fine scale numerical computations of LC effects using large-eddy simulations (LES). "This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."

上海混合层（UOML）中的Langmuir循环（LC）是一项最熟悉的特征，即线性条纹或海面条纹大致与风向平行。这些是由螺旋（卵形）水细胞顺时针旋转和逆时针旋转的，形成了地表的交替带（下流）和发散（上升）。风速确定这些循环细胞的深度和间距。然后，作为UOML中表面更新的驱动力，LC可能负责诸如植物区域捕获和运输浮游植物的过程，并将表面活性剂和可转移气体的收敛区收集和下沉到水柱中。 Investigators from the University of South Florida and the Smithsonian Research Center wish to extend numerical modeling studies of the effects of LC on two topics of interest to Antarctic oceanography, firstly, a) photoinhibition of the primary productivity of phytoplankton under Antarctic summer light fields (including effects of surface UV penetration) and possibly, b) parameterizations of sea-air gas exchange.最近的两个现场数据集，包括Ross Sea Polyna和Southern Ocean Gas Gas实验中的生产力研究（SO-GASEX），将构成使用大型模拟（LES）对现场数据与LC效应的精细数值计算进行比较的基础。 “该裁决是根据2009年《美国复苏与再投资法》（公法111-5）资助的。”