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

在极地环境和稳定分层条件下，精确量化地表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。湍流通量的适当表示要求对大气边界层进行充分的模拟。为了解决这些问题，有必要利用涡旋协方差法对近地表湍流通量进行高质量的原位测量来改进大气数据库。这些数据来自直接测量（CSAT3声波风速计，KH20氪湿度计），将允许验证简单通量梯度方法的模拟结果，该方法用于强迫大气-海洋-冰模型。在本项目中，涡旋协方差方法的结果用于验证常用的感热通量和潜热通量参数化，并改进北极区域大气气候模式（如HIRHAM和HIRLAM-6）中现有的参数化方案。

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.