Experimental Seasonal Vapor Pressure Deficit Guidance

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Forecast lead (months): 

Information on the background, references, and method is available.
Vapor pressure deficit (VPD) is defined here as the difference between the saturation vapor pressure e_s(T) and actual vapor pressure e_a(Td), which is calculated using 2-meter temperature T and 2-meter dewpoint temperature Td from the ERA5 reanalysis.