![]() ![]() (1964) based their definition of a SA event on ‘the occurrence of a 3-mb drop in pressure from Palmdale to Santa Monica, California a 9☌ or greater increase in temperature from Santa Monica to Palmdale northerly winds with speeds of 13 m s −1 or greater in the Riverside, San Bernadino Valley, California and a relative humidity of 30% or less in the Los Angeles, California area’. In the published literature, SA events have been defined in terms of various combinations and thresholds of barometric pressure, temperature, humidity, and wind speed and direction. The strong winds associated with SA events are driven by a combination of pressure and temperature gradient anomalies between the Great Basin and the ocean off the coast of southern California ( Raphael 2003 Hughes and Hall 2010).Ī complicating factor in the study of SA events is the lack of standardised criteria for the defining meteorological parameters and their values. SA events typically last 1.5 days ( Raphael 2003) and occur between September and April, with various indices of SA event frequency showing that December and November experience the highest number of SA events ( Raphael 2003 Hughes and Hall 2010). SA events are a seasonal weather phenomenon affecting southern California from Los Angeles to San Diego ( Schroeder et al. The suite of variables comprising the best-fit generalised linear model for predicting burned area ( R 2 = 0.41) included relative humidity, peak wind speed, previous-day burn perimeter and two binary indicators for first and last day of a fire event. Gust and peak wind speed had a strong positive correlation with burned area per day particularly within subsets of burned area representing only the first day of a fire, >500 ha burned areas, and on Santa Ana days. ![]() Relative humidity had the most consistently strong correlation with burned area per day. Santa Ana definition parameters (relative humidity, wind speed) along with other predictor variables (air temperature, fuel temperature, 10-h fuel moisture, population density, slope, fuel loading, previous-day burn perimeter) were tested individually and in combination for correlation with subsets of daily burned area. Our results show quantitatively that burned area per day is 3.5–4.5 times larger on Santa Ana days than on non-Santa Ana days. We analysed fire progression within 158 fire events in southern California as a function of meteorologically defined Santa Ana conditions between 20. While numerous anecdotal reports exist, there is little quantitative analysis in peer-reviewed literature on how this weather phenomenon influences fire progression rates. Continue your journey with awesome adventures with group riding adventures at Chicago Motorcycle Tours.Santa Ana winds have been implicated as a major driver of large wildfires in southern California. If you’re new to riding, we offer a comprehensive riding course at Chicago & Milwaukee Motorcycle School! Try your next bike before you buy with Chicago Motorcycle Rentals to see which bike suits your riding style best. Check out our award-winning service, parts, and accessories, and MotorClothes® departments to get all the extra gear you need to outfit your bike for your next trip! No matter which bikes you decide on, our professional financing staff will go the extra mile to ensure you get competitive rates and worry-free warranties. Our staff will guide you in choosing your next bike while offering proper fitting, and test rides. We have access to the largest inventory of up to 1,000 new and quality pre-owned motorcycles in the country. Visit Wild Fire Harley-Davidson® in Villa Park, serving Oak Park and Evanston, IL today to fulfill your personal dreams of freedom on the open road. We’re engaged in our communities and strive to connect one-on-one with you every day to meet and exceed your expectations long after purchasing your next motorcycle. Our core pledge to our valued customers always begins with choice, convenience, and value. We are proud to employ some of the best and most passionate motorcycle enthusiasts at our store in Villa Park, IL! We live and breathe the motorcycle lifestyle with a passion for the iconic Harley-Davidson® brand. Wild Fire Harley-Davidson® is owned and operated by riders, for riders. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |