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پاورپوینت Snow to Liquid Ratio Climatology and Forecast Methodologies - دانلود فایل



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دانلود فایل پاورپوینت Snow to Liquid Ratio Climatology and Forecast Methodologies نوع فایل power point قابل ویرایش 49 اسلاید قسمتی از اسلایدهاForecasting Winter Precipitation is a Two-Step ProcessFirst, the current dynamic and thermodynamic forcings of the storm must be assessed.Numerical model forecasts must be studied, especially the model quantitative precipitation forecast (QPF).Second, the evolution of the hydrometeors from their origin to the surface must be predicted.This evolution will be determined by the vertical profile of temperature and moisture.This profile will elucidate the type of precipitation- rain, snow, freezing rain, ice pellets, or any combination.If the precipitation is expected to fall as snow, a snow to liquid equivalent ratio must be determined to forecast the actual snow amount.Why is liquid ratio important to forecasters?After forecasting liquid equivalent (QPF), the snow-liquid equivalent ratio must be estimated.Significant variations in snow to liquid equivalent ratio can occur even within a single storm systemA more clear understanding of the processes that act to vary snow density will enable the forecaster to employ a more scientific process oriented method toward forecasting snowfall, versus commonly used empirical techniques. A challenge exists to determine the extent of interaction between the dynamical forcing and the microphysical processes that determine snow density (i.e., how efficient is the forcing in producing snowfall from a given amount of liquid equivalent?).SLR determines the wintertime precipitation efficiency فهرست مطالب و اسلایدهاForecasting Winter Precipitation is a Two-Step ProcessWhy is liquid ratio important to forecasters?Description of Dataset and MethodsStation distribution of the 30 year climatologyHistogram for the Entire Dataset of SLRSample SLR Climatological DistributionsVariability of Mean SLR within LSXRatio typically varies with storm trackIce Crystal HabitsCrystal habit depends on temperature and degree of saturationIce Crystal RimingBillings, MT ACARS SoundingA Physically-Based Method Using ClimatologyWhy must we use Climatology?How do I find the 850 mb Temp Anomalies?Other Methods for Forecasting SLR – Neural NetworkMost Important Factors in Forecasting SLRVerification of the Roebber AlgorithmOther Methods for Forecasting SLR – Cobb MethodThe Cobb MethodThe Cobb Method – Sample CalculationVerification of the Cobb MethodOne More Method – Dube Method (MSC)Sample Case - Roebber MethodVerification – 24 hr Snowfall TotalsSnow to Liquid Ratio Overview

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Snow to Liquid Ratio Climatology and Forecast Methodologies


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