Direct measurements of turbulent fluxes in the near-surface environment at high latitudes applying the eddy-covariance method

应用涡协方差法直接测量高纬度近地表环境中的湍流通量

• 批准号: 21439451
• 负责人: Professor Dr. Thomas Foken
• 金额: --
• 依托单位: Fachbereich VI - Raum- und Umweltwissenschaften
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2006-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/21439451?language=en
• 关键词: Direct; measurements; turbulent; fluxes; near

Accurate quantification of turbulent fluxes between the surface and the atmospheric boundary layer in polar environments and under stable stratification is a fundamental problem in ocean-atmosphere-ice interaction studies and numeric modelling. The proper representation of the turbulent fluxes requires adequate simulation of the atmospheric boundary layer. To address these problems, it is essential to improve the atmospheric databases with high-quality in-situ measurements of turbulent fluxes near the surface applying the eddy-covariance method. These data obtained from direct measurements (CSAT3 sonic anemometer, KH20 krypton hygrometer) will allow the validation of simulated results from simple flux gradient-methods used to force atmosphere-ocean-ice models. In this project results form the Eddy-Covariance method are used to validate commonly used sensible and latent heat flux parameterisations and to improve existing parameterisation schemes in Arctic regional atmospheric climate models such as HIRHAM and HIRLAM-6.

在极地环境和稳定层结条件下，准确量化表面和大气边界层之间的湍流通量是海洋-大气-冰相互作用研究和数值模拟的一个基本问题。湍流通量的正确表示需要对大气边界层进行充分的模拟。为了解决这些问题，它是必不可少的，以改善大气数据库的高质量的近地面湍流通量的现场测量应用涡度协方差方法。从直接测量（CSAT 3声波风速计，KH 20氪湿度计）获得的这些数据将允许验证模拟结果从简单的通量梯度的方法来迫使大气-海洋-冰模型。在这个项目中，涡度协方差方法的结果被用来验证常用的感热和潜热通量参数化，并改善现有的北极区域大气气候模式，如HIRHAM和HIRLAM-6的参数化方案。