Gradient‐based scales and similarity laws in the stable boundary layer
Abstract Three gradient‐based scaling systems for the stably stratified boundary layer are introduced and examined by using data collected during the SHEBA field programme in the Arctic. The resulting similarity functions for fluxes and variances are expressed in an analytical form, which is expecte...
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crwiley:10.1002/qj.638 2024-09-09T19:25:52+00:00 Gradient‐based scales and similarity laws in the stable boundary layer Sorbjan, Z. National Science Foundation 2010 http://dx.doi.org/10.1002/qj.638 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.638 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.638 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 136, issue 650, page 1243-1254 ISSN 0035-9009 1477-870X journal-article 2010 crwiley https://doi.org/10.1002/qj.638 2024-08-01T04:23:12Z Abstract Three gradient‐based scaling systems for the stably stratified boundary layer are introduced and examined by using data collected during the SHEBA field programme in the Arctic. The resulting similarity functions for fluxes and variances are expressed in an analytical form, which is expected to be essentially unaffected by self‐correlation in a very stable regime. The flux Richardson number Rf is found to be proportional to the Richardson number Ri , with the proportionality coefficient varying slightly with stability, from 1.11 to 1.47. The Prandtl number decreases from 0.9 in nearly neutral conditions to 0.7 for larger values of Ri . The negative correlation coefficient between the vertical velocity and temperature, − r w θ , has a local maximum at Ri of about 0.08, and monotonically decreases with larger values of the Richardson number. The turbulent kinetic energy budget indicates that for Ri > 0.7, turbulence must be non‐stationary, i.e. decaying or sporadic. Turbulence within the stably stratified boundary layer can be classified by four regimes: ‘nearly neutral’ (0 < Ri < 0.02), ‘weakly stable’ (0.02 < Ri < 0.12), ‘very stable’ (0.12 < Ri < 0.7), and ‘extremely stable’ (Ri > 0.7). Copyright © 2010 Royal Meteorological Society Article in Journal/Newspaper Arctic Wiley Online Library Arctic Quarterly Journal of the Royal Meteorological Society 136 650 1243 1254 |
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English |
description |
Abstract Three gradient‐based scaling systems for the stably stratified boundary layer are introduced and examined by using data collected during the SHEBA field programme in the Arctic. The resulting similarity functions for fluxes and variances are expressed in an analytical form, which is expected to be essentially unaffected by self‐correlation in a very stable regime. The flux Richardson number Rf is found to be proportional to the Richardson number Ri , with the proportionality coefficient varying slightly with stability, from 1.11 to 1.47. The Prandtl number decreases from 0.9 in nearly neutral conditions to 0.7 for larger values of Ri . The negative correlation coefficient between the vertical velocity and temperature, − r w θ , has a local maximum at Ri of about 0.08, and monotonically decreases with larger values of the Richardson number. The turbulent kinetic energy budget indicates that for Ri > 0.7, turbulence must be non‐stationary, i.e. decaying or sporadic. Turbulence within the stably stratified boundary layer can be classified by four regimes: ‘nearly neutral’ (0 < Ri < 0.02), ‘weakly stable’ (0.02 < Ri < 0.12), ‘very stable’ (0.12 < Ri < 0.7), and ‘extremely stable’ (Ri > 0.7). Copyright © 2010 Royal Meteorological Society |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Sorbjan, Z. |
spellingShingle |
Sorbjan, Z. Gradient‐based scales and similarity laws in the stable boundary layer |
author_facet |
Sorbjan, Z. |
author_sort |
Sorbjan, Z. |
title |
Gradient‐based scales and similarity laws in the stable boundary layer |
title_short |
Gradient‐based scales and similarity laws in the stable boundary layer |
title_full |
Gradient‐based scales and similarity laws in the stable boundary layer |
title_fullStr |
Gradient‐based scales and similarity laws in the stable boundary layer |
title_full_unstemmed |
Gradient‐based scales and similarity laws in the stable boundary layer |
title_sort |
gradient‐based scales and similarity laws in the stable boundary layer |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1002/qj.638 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.638 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.638 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 136, issue 650, page 1243-1254 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/qj.638 |
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Quarterly Journal of the Royal Meteorological Society |
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136 |
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650 |
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1243 |
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1254 |
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1809895570906546176 |