Influence of Wind Waves on Air-Sea Gas Transfer

尽管大气-海洋气体交换对环境强迫的依赖性已引起广泛关注，但气体输送速度与风速的经验关系式仍被广泛使用。实验数据清楚地证明了这是不够的，但物理上更相关的参数，特别是风浪场的参数，往往无法在实验中测量到。研制了一种新型的波场测量光学仪器，首次实现了在气体交换的同时，利用主动热像仪测量波场参数。我们将在2012年12月FS Meteor上的SOLAS-秘鲁(M91)巡航中增加关于气体交换的重要缺失参数的测量--波场和微气象的统计数据，目标是用基于物理的参数化来取代当前使用的经验气体交换/风速关系。

Even though significant attention has been dedicated to the investigation of the dependence of air-sea gas exchange on environmental forcing, empirical relations of gas transfer velocities with wind speed are still widely used. Experimental data clearly proves this to be insufficient, but physically more relevant parameters, especially of the wind-wave field, often times could not be measured in experiments. A novel optical instrument for the measurement of waves has been developed, which allows us to measure wave field parameters at the same footprint as gas exchange by active thermography for the first time. We will add measurements of important missing parameters for gas exchange -- statistics of the wave field and micro-meteorology -- to the SOLAS-Peru (M91) cruise on FS Meteor in December 2012 with the goal to replace currently used empirical gas exchange / wind speed relations with a physically-based parametrization.