Linearity of DMS transfer coefficient with both friction velocity and wind speed in the moderate wind speed range
Linearity of DMS transfer coefficient with both friction velocity and wind speed in the moderate wind speed range
复制标题
DOI：
10.1029/2009gl041203
复制
发表时间：
2010-01
影响因子：
5.2
通讯作者：
B. Huebert;B. Blomquist;M. Yang;S. Archer;P. Nightingale;M. Yelland;J. Stephens;R. Pascal;B. Moat
中科院分区：
文献类型：
--
作者：
B. Huebert;B. Blomquist;M. Yang;S. Archer;P. Nightingale;M. Yelland;J. Stephens;R. Pascal;B. Moat
在许多海气交换参数化中，风速是交换速度k的唯一环境控制因素。在这里，我们还研究了摩擦速度（u*）在中等风速范围内的作用，使用2007年深海气体交换实验的数据。我们测量了二甲基硫醚（DMS）通量，并将其除以界面浓度差ΔCDMS，得出k。计算出的KS是敏感的空间梯度在海水中的DMS浓度（DMSw）。u* 或U10 N（风速）的线性函数解释了k的87%的方差。较低和较高的风将在范围之间的过渡中具有不同的物理和曲率。这种线性表明，在风速范围U10 N = 4-12 m/s内，风力驱动搅拌的简单物理模型足以用于DMS。与风速的非线性关系将是多余的，并且模糊了物理学。
In many air‐sea gas exchange parameterizations, wind speed is the sole environmental controlling factor for exchange velocity, k. Here we examine also the role of friction velocity (u*) in the mid‐range of wind speeds, using data from the 2007 Deep Ocean Gas Exchange Experiment. We measured dimethyl sulfide (DMS) fluxes and divided these by the interfacial concentration difference, ΔCDMS, to derive k. Computed ks are sensitive to spatial gradients in seawater DMS concentration (DMSw). A linear function with either u* or U10N (wind speed) explains 87% of the variance in k. Lower and higher winds will have different physics and curvature in transitions between ranges. This linearity demonstrates that a simple physical model of wind‐driven stirring is sufficient for DMS in the wind speed range U10N = 4–12 m/s. A non‐linear relationship to wind speed would be superfluous and obscures the physics.