Abstract
Influence of the spray generation due to the fragmentation of the “bag-breakup” type on momentum exchange in the atmospheric boundary layer above the sea surface at hurricane winds was investigated on the basis of the analysis of the results of laboratory experiments. It was shown that aerodynamic drag is determined by the contribution of three factors: first, the drag of the “bag-breakup” canopies as obstacles; second, acceleration of the spray formed during fragmentation by the air flow; and the third factor is related to the stratification of the near-water atmospheric layer due to the presence of levitated water droplets. Combination of all three factors leads to a non-monotonous dependence of the aerodynamic drag coefficient on wind speed, which confirms the results of the field and laboratory measurements.
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Published in Russian in Doklady Akademii Nauk, 2017, Vol. 477, No. 3, pp. 361–366.
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Troitskaya, Y.I., Ermakova, O.S., Kandaurov, A.A. et al. Non-monotonous dependence of the ocean surface drag coefficient on the hurricane wind speed due to the fragmentation of the ocean-atmosphere interface. Dokl. Earth Sc. 477, 1373–1378 (2017). https://doi.org/10.1134/S1028334X17110265
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DOI: https://doi.org/10.1134/S1028334X17110265