Influence of stability on the flux-profile relationships for wind speed, <i>Φ</i><sub>m</sub>, and temperature, <i>Φ</i><sub>h</sub>, for the stable atmospheric boundary layer
Data from SABLES98 experimental campaign have been used in order to study the influence of stability (from weak to strong stratification) on the flux-profile relationships for momentum, <i>Φ</i><sub>m</sub>, and heat, <i>Φ</i><sub>h</sub&g...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2006-01-01
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| Series: | Nonlinear Processes in Geophysics |
| Online Access: | http://www.nonlin-processes-geophys.net/13/185/2006/npg-13-185-2006.pdf |
| _version_ | 1818050827232739328 |
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| author | C. Yagüe S. Viana G. Maqueda J. M. Redondo |
| author_facet | C. Yagüe S. Viana G. Maqueda J. M. Redondo |
| author_sort | C. Yagüe |
| collection | DOAJ |
| description | Data from SABLES98 experimental campaign have been used in order to study the influence of stability (from weak to strong stratification) on the flux-profile relationships for momentum, <i>Φ</i><sub>m</sub>, and heat, <i>Φ</i><sub>h</sub>. Measurements from 14 thermocouples and 3 sonic anemometers at three levels (5.8, 13.5 and 32 m) for the period from 10 to 28 September 1998 were analysed using the framework of the local-scaling approach (Nieuwstadt, 1984a; 1984b), which can be interpreted as an extension of the Monin-Obukhov similarity theory (Obukhov, 1946). The results show increasing values of <i>Φ</i><sub>m</sub> and <i>Φ</i><sub>h</sub> with increasing stability parameter ζ=z/Λ, up to a value of ζ≈1–2, above which the values remain constant. As a consequence of this levelling off in <i>Φ</i><sub>m</sub> and <i>Φ</i><sub>h</sub> for strong stability, the turbulent mixing is underestimated when linear similarity functions (Businger et al., 1971) are used to calculate surface fluxes of momentum and heat. On the other hand when <i>Φ</i><sub>m</sub> and <i>Φ</i><sub>h</sub> are related to the gradient Richardson number, <i>R<sub>i</sub></i>, a different behaviour is found, which could indicate that the transfer of momentum is greater than that of heat for high <i>R<sub>i</sub></i>. The range of validity of these linear functions is discussed in terms of the physical aspects of turbulent intermittent mixing. |
| first_indexed | 2024-12-10T10:59:39Z |
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| institution | Directory Open Access Journal |
| issn | 1023-5809 1607-7946 |
| language | English |
| last_indexed | 2024-12-10T10:59:39Z |
| publishDate | 2006-01-01 |
| publisher | Copernicus Publications |
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| series | Nonlinear Processes in Geophysics |
| spelling | doaj.art-636e56fede724d0cb0c3998f4da0c0d82022-12-22T01:51:44ZengCopernicus PublicationsNonlinear Processes in Geophysics1023-58091607-79462006-01-01132185203Influence of stability on the flux-profile relationships for wind speed, <i>Φ</i><sub>m</sub>, and temperature, <i>Φ</i><sub>h</sub>, for the stable atmospheric boundary layerC. YagüeS. VianaG. MaquedaJ. M. RedondoData from SABLES98 experimental campaign have been used in order to study the influence of stability (from weak to strong stratification) on the flux-profile relationships for momentum, <i>Φ</i><sub>m</sub>, and heat, <i>Φ</i><sub>h</sub>. Measurements from 14 thermocouples and 3 sonic anemometers at three levels (5.8, 13.5 and 32 m) for the period from 10 to 28 September 1998 were analysed using the framework of the local-scaling approach (Nieuwstadt, 1984a; 1984b), which can be interpreted as an extension of the Monin-Obukhov similarity theory (Obukhov, 1946). The results show increasing values of <i>Φ</i><sub>m</sub> and <i>Φ</i><sub>h</sub> with increasing stability parameter ζ=z/Λ, up to a value of ζ≈1–2, above which the values remain constant. As a consequence of this levelling off in <i>Φ</i><sub>m</sub> and <i>Φ</i><sub>h</sub> for strong stability, the turbulent mixing is underestimated when linear similarity functions (Businger et al., 1971) are used to calculate surface fluxes of momentum and heat. On the other hand when <i>Φ</i><sub>m</sub> and <i>Φ</i><sub>h</sub> are related to the gradient Richardson number, <i>R<sub>i</sub></i>, a different behaviour is found, which could indicate that the transfer of momentum is greater than that of heat for high <i>R<sub>i</sub></i>. The range of validity of these linear functions is discussed in terms of the physical aspects of turbulent intermittent mixing.http://www.nonlin-processes-geophys.net/13/185/2006/npg-13-185-2006.pdf |
| spellingShingle | C. Yagüe S. Viana G. Maqueda J. M. Redondo Influence of stability on the flux-profile relationships for wind speed, <i>Φ</i><sub>m</sub>, and temperature, <i>Φ</i><sub>h</sub>, for the stable atmospheric boundary layer Nonlinear Processes in Geophysics |
| title | Influence of stability on the flux-profile relationships for wind speed, <i>Φ</i><sub>m</sub>, and temperature, <i>Φ</i><sub>h</sub>, for the stable atmospheric boundary layer |
| title_full | Influence of stability on the flux-profile relationships for wind speed, <i>Φ</i><sub>m</sub>, and temperature, <i>Φ</i><sub>h</sub>, for the stable atmospheric boundary layer |
| title_fullStr | Influence of stability on the flux-profile relationships for wind speed, <i>Φ</i><sub>m</sub>, and temperature, <i>Φ</i><sub>h</sub>, for the stable atmospheric boundary layer |
| title_full_unstemmed | Influence of stability on the flux-profile relationships for wind speed, <i>Φ</i><sub>m</sub>, and temperature, <i>Φ</i><sub>h</sub>, for the stable atmospheric boundary layer |
| title_short | Influence of stability on the flux-profile relationships for wind speed, <i>Φ</i><sub>m</sub>, and temperature, <i>Φ</i><sub>h</sub>, for the stable atmospheric boundary layer |
| title_sort | influence of stability on the flux profile relationships for wind speed i phi i sub m sub and temperature i phi i sub h sub for the stable atmospheric boundary layer |
| url | http://www.nonlin-processes-geophys.net/13/185/2006/npg-13-185-2006.pdf |
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