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| Titel |
Turbulent heat fluxes by profile and inertial dissipation methods: analysis of the atmospheric surface layer from shipboard measurements during the SOFIA/ASTEX and SEMAPHORE experiments |
| VerfasserIn |
H. Dupuis, A. Weill, K. Katsaros, P. K. Taylor |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 13, no. 10 ; Nr. 13, no. 10, S.1065-1074 |
| Datensatznummer |
250012008
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| Publikation (Nr.) |
 copernicus.org/angeo-13-1065-1995.pdf |
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| Zusammenfassung |
| Heat flux estimates obtained using the
inertial dissipation method, and the profile method applied to radiosonde
soundings, are assessed with emphasis on the parameterization of the roughness
lengths for temperature and specific humidity. Results from the inertial
dissipation method show a decrease of the temperature and humidity roughness
lengths for increasing neutral wind speed, in agreement with previous studies.
The sensible heat flux estimates were obtained using the temperature estimated
from the speed of sound determined by a sonic anemometer. This method seems very
attractive for estimating heat fluxes over the ocean. However allowance must be
made in the inertial dissipation method for non-neutral stratification. The
SOFIA/ASTEX and SEMAPHORE results show that, in unstable stratification, a term
due to the transport terms in the turbulent kinetic energy budget, has to be
included in order to determine the friction velocity with better accuracy. Using
the profile method with radiosonde data, the roughness length values showed
large scatter. A reliable estimate of the temperature roughness length could not
be obtained. The humidity roughness length values were compatible with those
found using the inertial dissipation method. |
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