New findings concerning the exchange of sensible heat and water vapor over the ocean

Erik Sahlée, Ann-Sofi Smedman, Xiaoli Guo Larsén, Anna Rutgersson, Ulf Högström

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Abstract

put into understanding the exchange of momentum, heat and moisture between the ocean and the atmosphere. But the last word concerning these processes is far from being said. Since direct measurements of these fluxes are difficult to make in the marine environment, a common approach is to relate them to more easily measured parameters as mean temperature gradients and wind speed through bulk coefficients. The main focus in this study is on the bulk transfer coefficients of sensible and latent heat e.g. the Stanton and Dalton number, CH and CE.
One effect that is under debate is the influence of sea spray from breaking waves on the heat fluxes. Andreas and DeCosmo (2002) reanalysed data from the HEXOS experiment and found that these effects starts to play a roll already at 10ms-1. They also draw the conclusion that sea spray is responsible for 20-30% of the total flux in the wind speed range 15-18 ms-1. Larsén et al. (2004) found from measurements that the neutral Stanton number CHN at 16 ms-1 was about 50% higher than predicted theoretically by surface renewal theory (Liu et al., 1979). The main focus of this study is to see if and how sea spray is influencing the turbulent structure in the marine boundary layer. This is done by comparison of the cospectra for sensible and latent heat flux during different wind speeds.
Original languageEnglish
Title of host publication16th Symposium on Boundary Layers and Turbulence and 13th Conference on Interactions of the Sea and Atmosphere
Number of pages7
PublisherAmerican Meteorological Society
Publication date2004
ChapterJ2.4
Publication statusPublished - 2004
Externally publishedYes
Event16th Symposium on Boundary Layers and Turbulence and 13th Conference on Interactions of the Sea and Atmosphere - Portland, ME, United States
Duration: 9 Aug 200413 Aug 2004

Conference

Conference16th Symposium on Boundary Layers and Turbulence and 13th Conference on Interactions of the Sea and Atmosphere
CountryUnited States
CityPortland, ME
Period09/08/200413/08/2004

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