brief communication: synoptic-scale differences between sundowner and santa ana wind regimes in the santa ynez mountains, california
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ID: 174988
2018
Downslope Sundowner winds in southern California's Santa Ynez Mountains favor wildfire growth. To explore differences between Sundowners and Santa Ana winds (SAWs), we use surface observations from 1979 to 2014 to develop a climatology of extreme Sundowner days. The climatology was compared to an existing SAW index from 1979 to 2012. Sundowner (SAW) occurrence peaks in late spring (winter). SAWs demonstrate amplified 500 hPa geopotential heights over western North America and anomalous positive inland mean sea-level pressures. Sundowner-only conditions display zonal 500 hPa flow and negative inland sea-level pressure
anomalies. A low-level northerly coastal jet is present during Sundowners but not SAWs.
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hatchett2018naturalbrief
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Authors | ;B. J. Hatchett;C. M. Smith;N. J. Nauslar;N. J. Nauslar;M. L. Kaplan |
Journal | anziam journal |
Year | 2018 |
DOI | 10.5194/nhess-18-419-2018 |
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