Observations of the Daytime Boundary Layer in Deep Alpine Valleys
| Autor: | J. P. Chollet, Charles Chemel |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences Meteorology Mixed layer Planetary boundary layer Wind profiler Atmospheric sciences 01 natural sciences Convective Boundary Layer 010305 fluids & plasmas Atmosphere Boundary layer Altitude 13. Climate action 0103 physical sciences Sunrise Geology 0105 earth and related environmental sciences |
| Zdroj: | Boundary-Layer Meteorology. 119:239-262 |
| ISSN: | 1573-1472 0006-8314 |
| DOI: | 10.1007/s10546-005-9026-4 |
| Popis: | Mixing depth structure and its evolution have been diagnosed from radar wind profiler data in the Chamonix and the Maurienne valleys (France) during summer 2003. The behaviour of refractive index structure parameter C 2 peaks coupled with the vertical velocity variance σ 2 was used to estimate the height of the mixed layer. Tethersonde vertical profiles were carried out to investigate the lower layers of the atmosphere in the range of approximately 400–500 m above ground level. The tethersonde device was especially useful to study the reversal of the valley wind system during the morning transition period. Specific features such as wind reversal and the convective mixed layer up to approximately the altitude of the surrounding mountains were documented. The wind reversal was observed to be much more sudden in the Maurienne valley than in the Chamonix valley |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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