Production velocity of sea spray droplets
Production velocity of sea spray droplets
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DOI：
10.1029/2010jc006458
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发表时间：
2010-12-28
影响因子：
3.6
通讯作者：
Fairall, Christopher W.
中科院分区：
文献类型：
--
作者：
Andreas, Edgar L.;Jones, Kathleen F.;Fairall, Christopher W.
海雾产生函数df/dr(0)预测在海面上产生初始半径为r(0)的液滴的速率。然而，由于这一函数在海洋环境中不易测量，它通常是通过假设的速度标度，即有效喷雾产生速度，通过测量近表面液滴浓度C(r(0))来推断的。然而，本文进行了相反的工作：它使用可靠的df/dr(0)估计和13组海洋上的C(r(0))测量来计算初始半径r(0)从5到300微米的液滴的隐含有效生产速度V-ff，然后将这些V-eff值与该生产速度的四个候选表达式进行比较：干沉积速度V-dh；显著波幅(A(1/3))的平均风速U-A1/3；垂直液滴速度的标准差sigma(Wd)；和喷雾液滴喷射速度的实验室测量，V-EJ。速度标度U-A1/3和V-Ej与隐含的20%的V-Eff值最吻合
The sea spray generation function dF/dr(0) predicts the rate at which droplets of initial radius r(0) are produced at the sea surface. Because this function is not readily measurable in the marine environment, however, it is often inferred from measurements of the near-surface droplet concentration, C(r(0)), through an assumed velocity scale, the effective spray production velocity. This paper proceeds in reverse, though: It uses a reliable estimate of dF/dr(0) and 13 sets of measurements of C(r(0)) over the ocean to calculate the implied effective production velocity, V-eff, for droplets with initial radii r(0) from 5 to 300 mu m. It then compares these V-eff values with four candidate expressions for this production velocity: the dry-deposition velocity, V-Dh; the mean wind speed at the significant wave amplitude (A(1/3)), U-A1/3; the standard deviation in vertical droplet velocity, sigma(wd); and laboratory measurements of the ejection velocity of jet droplets, V-ej. The velocity scales U-A1/3 and V-ej agree best with the implied V-eff values for 20