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SIERRA WAVES AND ROTORS: A STUDY OF THE SIERRA ROTORS IOP 8 EVENT

Vanda Grubišić ; Desert Research Institute, 2215 Raggio Parkway, Reno, NV 89512, USA
Brian J. Billings ; Desert Research Institute, 2215 Raggio Parkway, Reno, NV 89512, USA


Puni tekst: engleski pdf 2.993 Kb

str. 205-208

preuzimanja: 283

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Sažetak

The Sierra Rotors Project took place in March and April 2004 in Owens Valley, California to study terrain-induced rotors. An intense rotor event was documented during Intensive Observing Period (IOP) 8 on 24-26 March 2004. The event was characterized by a cold frontal passage and strong westerly flow at the mountain top level that induced mountain waves and rotors over Owens Valley. This case was simulated with the Naval Research Laboratory's (NRL) Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPSTM) run at 333 m resolution. In this study, we analyze the evolution and structure of the observed and simulated mountain waves and rotors during the IOP 8 event, in which horizontal circulation associated with the rotor extended to the valley floor, where it was observed as easterly flow by the DR1 mesonetwork of surface stations. The model accurately reproduced the timing and spatial structure of many of the observed phenomena, including thermally forced flow in the valley at the start of the event, an intense mountain wave during the period of observed surface easterly flow, and strong westerlies on the Sierra Nevada lee slopes.

Ključne riječi

Sierra Nevada; Sierra Rotors Project; T-REX; mountain waves; rotors

Hrčak ID:

64524

URI

https://hrcak.srce.hr/64524

Datum izdavanja:

15.12.2005.

Posjeta: 557 *