期刊
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
卷 127, 期 1, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2021JC017774
关键词
air-sea interaction; tropical cyclones; sea spray
类别
资金
- National Science Foundation [ICER-1854929]
Accurate estimates of air-sea enthalpy and momentum fluxes are crucial for predicting hurricane intensity. A study finds that at extreme wind speeds, the net sea spray-mediated enthalpy and momentum fluxes can be well-approximated by using the net sea spray mass flux alone, implying a substantial simplification of air-sea flux calculations.
Accurate estimates of air-sea enthalpy and momentum fluxes are critically important for hurricane intensity predictions. However, calculating these fluxes is challenging due to the nature of the air-sea transition region. At extreme wind speeds, a substantial amount of sea spray is lofted making it necessary to calculate the sea spray-mediated enthalpy and momentum fluxes. These calculations rely on microphysical equations, which are sensitive to the details of the local environmental conditions. Here we use a microphysical model to show that there exists a threshold wind speed beyond which the net sea spray-mediated enthalpy and momentum fluxes are well-approximated by using the net sea spray mass flux alone. This result supports the hypothesis that at extreme wind speeds, the ratio of the air-sea exchange coefficients becomes independent of wind speed, implying the air-sea flux calculations can be substantially simplified.
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