Validation of a simple diagnostic relationship for downslope flows
Abstract A simple conceptual view of downslope flows allows a derivation of a diagnostic relationship between the maximum depth of the flow, its speed, the slope angle and the cooling flux. This relationship is obtained considering that the turbulence cooling causing the air to flow downslope is ess...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-05-01
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| Series: | Atmospheric Science Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/asl.965 |
| _version_ | 1828875543857070080 |
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| author | Joan Cuxart Daniel Martínez‐Villagrasa Ivana Stiperski |
| author_facet | Joan Cuxart Daniel Martínez‐Villagrasa Ivana Stiperski |
| author_sort | Joan Cuxart |
| collection | DOAJ |
| description | Abstract A simple conceptual view of downslope flows allows a derivation of a diagnostic relationship between the maximum depth of the flow, its speed, the slope angle and the cooling flux. This relationship is obtained considering that the turbulence cooling causing the air to flow downslope is essentially compensated by the warming by compression as the flow reaches higher pressure levels. The obtained relationship is consistent with the bulk heat budget for the along‐slope flows, and its agreement with existing prognostic layer‐averaged models is checked. Finally, the depth of the flow obtained from the diagnostic relationship is compared against the observational estimations of katabatic flows from two experimental campaigns. |
| first_indexed | 2024-12-13T08:01:07Z |
| format | Article |
| id | doaj.art-17ee532786b949e6868fde98862e4b3c |
| institution | Directory Open Access Journal |
| issn | 1530-261X |
| language | English |
| last_indexed | 2024-12-13T08:01:07Z |
| publishDate | 2020-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Atmospheric Science Letters |
| spelling | doaj.art-17ee532786b949e6868fde98862e4b3c2022-12-21T23:54:26ZengWileyAtmospheric Science Letters1530-261X2020-05-01215n/an/a10.1002/asl.965Validation of a simple diagnostic relationship for downslope flowsJoan Cuxart0Daniel Martínez‐Villagrasa1Ivana Stiperski2Department of Physics University of the Balearic Islands Palma SpainDepartment of Physics University of the Balearic Islands Palma SpainDepartment of Atmospheric and Cryospheric Sciences University of Innsbruck Innsbruck AustriaAbstract A simple conceptual view of downslope flows allows a derivation of a diagnostic relationship between the maximum depth of the flow, its speed, the slope angle and the cooling flux. This relationship is obtained considering that the turbulence cooling causing the air to flow downslope is essentially compensated by the warming by compression as the flow reaches higher pressure levels. The obtained relationship is consistent with the bulk heat budget for the along‐slope flows, and its agreement with existing prognostic layer‐averaged models is checked. Finally, the depth of the flow obtained from the diagnostic relationship is compared against the observational estimations of katabatic flows from two experimental campaigns.https://doi.org/10.1002/asl.965diagnostic formuladownslope flowkatabatic depthMATERHORN campaignMETCRAX II campaign |
| spellingShingle | Joan Cuxart Daniel Martínez‐Villagrasa Ivana Stiperski Validation of a simple diagnostic relationship for downslope flows Atmospheric Science Letters diagnostic formula downslope flow katabatic depth MATERHORN campaign METCRAX II campaign |
| title | Validation of a simple diagnostic relationship for downslope flows |
| title_full | Validation of a simple diagnostic relationship for downslope flows |
| title_fullStr | Validation of a simple diagnostic relationship for downslope flows |
| title_full_unstemmed | Validation of a simple diagnostic relationship for downslope flows |
| title_short | Validation of a simple diagnostic relationship for downslope flows |
| title_sort | validation of a simple diagnostic relationship for downslope flows |
| topic | diagnostic formula downslope flow katabatic depth MATERHORN campaign METCRAX II campaign |
| url | https://doi.org/10.1002/asl.965 |
| work_keys_str_mv | AT joancuxart validationofasimplediagnosticrelationshipfordownslopeflows AT danielmartinezvillagrasa validationofasimplediagnosticrelationshipfordownslopeflows AT ivanastiperski validationofasimplediagnosticrelationshipfordownslopeflows |