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Snow-17 Overview

This slide deck from the NWS Calibration Workshop in March 2009 provides an overview of the Snow-17 model and its assumptions regarding temperature, snow cover density, and heat deficit change. It also covers the transmission of liquid water in the model.

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Snow-17 Overview

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  1. Snow-17 Overview NWS Calibration Workshop, LMRFC March, 2009 slide - 1

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  11. Snow 17 Model – Change in Heat Deficit (Note: In ICP ATI is plotted as ‘TINDEX’) • Assumptions • Snow surface temperature (Ts)=Ta (Ts<=0oC) • ATI reflects temperature inside snow cover (ATI <=0oC) • NMf varies seasonally to reflect changes in average snow • cover density • Note: • DD can be positive or negative • D also referred to as negative heat storage (NEGHS) NWS Calibration Workshop, LMRFC March, 2009 slide - 11

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  14. Transmission of liquid water NWS Calibration Workshop, LMRFC March, 2009 slide - 14

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