http://www.cnr.it/ontology/cnr/individuo/prodotto/ID13043
Turbulence perturbations in the neutrally stratified surface layer due to interaction of katabatic flow with a steep ridge. (Articolo in rivista)
- Type
- Label
- Turbulence perturbations in the neutrally stratified surface layer due to interaction of katabatic flow with a steep ridge. (Articolo in rivista) (literal)
- Anno
- 2005-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1007/s10652-004-3268-4 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Mammarella I(1).; Tampieri F.(2); Tagliazucca M.(2); Nardino M.(4) (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- Scopu (literal)
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1)Finnish Meteorological Institute, P.O.B. 503, FIN-00101 Helsinki, Finland
2)ISAC - CNR, Via Gobetti, 101, 40129 Bologna, Italy
3)IBIMET - CNR, Via Gobetti, 101, 40129 Bologna, Italy (literal)
- Titolo
- Turbulence perturbations in the neutrally stratified surface layer due to interaction of katabatic flow with a steep ridge. (literal)
- Abstract
- Abstract. Turbulence measurements were performed in Antarctica, on the Nansen Ice Sheet, dominated
by westerly katabatic winds. The measurements were taken at two sites aligned with the
katabatic wind fall-line. The measuring stations were located in the middle of a wide, flat iced area
at a distance of 14 km from the base of a sloping surface and at the top of a steep ridge (Inexpressible
Island). The aim was to investigate the perturbation of turbulence close to the ground generated by
the interaction of the flow with the ridge. We present an analysis comparing the data measured at the
upstream unperturbed station with those at the top of the obstacle. Moments and spectra of velocity
components have been calculated for almost steady periods. The topography and roughness change
produce a combined effect on the flow acceleration (of the opposite sign) and on the turbulent stresses
(of the same sign). Spectra of velocity components measured at the top of the ridge and scaled by
unperturbed quantities evidence an increment of energy in the high frequency subrange with respect
to the up-stream flow. Moreover, the horizontal velocity components display a shift in turbulence
maximum towards higher frequencies. The vertical velocity spectrum exhibits an energy increment
at low frequencies with respect to the upstream spectrum. (literal)
- Prodotto di
- Autore CNR
- Insieme di parole chiave
Incoming links:
- Prodotto
- Autore CNR di
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
- Insieme di parole chiave di