A new expression for the production rate of sea water droplets on the sea surface |
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| Authors: | Noriko Iida Yoshiaki Toba Masaaki Chaen |
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| Institution: | (1) National Center for Science Information Systems, 112 Bunkyo-ku, Tokyo, Japan;(2) Department of Geophysics, Faculty of Science, Tohoku University, 980 Aoba-ku, Sendai, Japan;(3) Faculty of Fisheries, Kagoshima University, 890 Kagoshima, Japan |
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| Abstract: | A new set of empirical formulas for the production rate and the number concentration of sea-water droplets on the sea surface are proposed, synthesizing past observation data of sea-salt particles in the sea and water droplets in wind-wave tanks. A new levelz
c
is introduced as the effective wind-sea surface where seawater droplets are produced. The new formulas are expressed in linear functions in logarithmic scales ofu*2/v
p
, a parameter to describe overall conditions of airsea boundary processes, whereu
* is the friction velocity of air,v the kinematic viscosity of air and
p
the peak angular frequency of wind-wave part of wave spectra. A model of coexistence of spray droplets and suspended particles near the sea surface is proposed. As for the independent parameter, a comparison between the uses ofu*2/v
p
and ofu
*
3 which was the traditional way of parameterization excluding wave measure, shows that the advantage of usingu*2/v
p
is statistically significant with a confidence limit 89% in F-test. |
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