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Soil Heat Flow and Temperature

This quick answer describes how to measure and interpret soil heat flux density measurements for use in energy balance calculations.


This quick answer describes radiation theory and how to estimate net radiation for use in energy balance calculations.

Sunshine Hours      

This quick answer provides an Excel program to convert from solar irradiance to hours of bright sunshine.

Sensible Heat Flux

This quick answer describes the concepts of sensible heat flux density, which is used in energy balance calculations.

Psychrometer Relationships 

This quick answer describes psychrometric relationships and concepts related to shielding and ventilation of thermometers and psychrometers.

Vapor Pressure Deficit 

This quick answer describes a method and provides tables and equations for measuring vapor pressure deficit in the field.