The Influence of Small Scale Turbulence and Coherent Structures on Air-Sea Heat Flux

小尺度湍流和相干结构对海气热通量的影响

• 批准号: 0118449
• 负责人: W Melville
• 金额: $ 73.39万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-10-01 至 2006-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0118449&HistoricalAwards=false
• 关键词: Influence; Small; Scale; Turbulence; Coherent

MelvilleOCE-0118449Wind gustiness produces small waves that modulate the surface shear implying a transition from laminar to turbulent flow in the near surface layer and causing disruption of the surface skin layer. The PIs propose to confirm the presence of small scale Langmuir circulations under typical wind conditions, to determine the space and time scales associated with the surface turbulence, to examine the impact on the associated surface renewal, and to compare the experimental results with numerical and theoretical model predictions. Deployment of their laser-based PIV system in a lake will occur in year one (and possibly a FLIP deployment). A FLIP deployment will occur in year two with emphasis on understanding the heat flux budget in the ocean surface layers. Year three will include analysis, study of ancillary processes such as the role of surfactants, modeling, a second FLIP experiment with a focus on the relationships of renewal and turbulence-laminar flow transition to gustiness and its associated scales. Year four will be devoted to analysis and writing.

MelvilleOCE-0118449阵风产生调制表面切变的小波浪，这意味着在近地层中从层流过渡到湍流，并导致表面皮肤层的破坏。 PI建议确认典型风况下小尺度朗缪尔环流的存在，确定与表面湍流相关的空间和时间尺度，检查对相关表面更新的影响，并将实验结果与数值和理论模型预测进行比较。 他们基于激光的PIV系统将在第一年部署在湖泊中（可能是FLIP部署）。 FLIP部署将在第二年进行，重点是了解海洋表层的热通量预算。 第三年将包括分析，辅助过程的研究，如表面活性剂的作用，建模，第二个FLIP实验，重点是更新和湍流层流过渡到阵风及其相关尺度的关系。 第四年将致力于分析和写作。