期刊
GEOPHYSICAL RESEARCH LETTERS
卷 41, 期 8, 页码 2997-3003出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2014GL059746
关键词
air; sea transfer; enthalpy flux; sea spray; dropsonde
资金
- NSF-AGS Postdoctoral Research Fellowship [AGS-1231193]
- National Science Foundation
It has long been conjectured that spray ejected from the high-wind ocean surface enhances air/sea enthalpy fluxes, but a lack of observational data, particularly at wind speeds exceeding 20ms(-1), has prevented either confirmation or refutation of this hypothesis. The current study has two aims: first, to provide an estimate of surface enthalpy fluxes obtained from dropsonde data and second, to provide evidence of spray-mediated enthalpy transfer. These are accomplished first by assuming that Monin-Obukhov similarity is satisfied throughout the bottom 100m of the high-wind boundary layer, then by focusing on the enthalpy flux H-K rather than its transfer coefficient C-K. The scaling of H(K)with wind speed in observational data sets reveals similarities to spray-mediated fluxes predicted by a newly developed surface flux model, in contrast with measurements made in a laboratory setting. This behavior supports the claim that surface enthalpy fluxes are dominated by spray within tropical cyclones. Key Points Spray dominates enthalpy flux at the hurricane air-sea interface Enthalpy fluxes can be estimated from dropsonde thermodynamic data Trends of enthalpy flux coefficient can be misleading due to uncertainty
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