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Potential evapotranspiration is expressed in terms of a depth of water or soil moisture percentage. If the actual evapotranspiration is considered the net result of atmospheric demand for moisture from a surface and the ability of the surface to supply moisture, then PET is a measure of the demand side (also called evaporative demand).
On Jan. 31, snowpack in Central Sierra was 53% of normal, while Southern Sierra was at 36%, data from the California Department of Water Resources shows. As of Feb. 14, those numbers are at 70% ...
Monthly estimated potential evapotranspiration and measured pan evaporation for two locations in Hawaii, Hilo and Pahala. Potential evapotranspiration is usually measured indirectly, from other climatic factors, but also depends on the surface type, such as free water (for lakes and oceans), the soil type for bare soil, and also the density and diversity of vegetation.
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Federal records show that more than 2 billion gallons were released from the reservoirs over three days. Read more: Trump wants to upend California water policy. State officials say it could do harm
It uses meteorological data from the moment of the recording of the satellite data to solve the 'instantaneous' energy balance, and uses extrapolation to calculate daily evapotranspiration. Using a time series of satellite and meteorological data, periodic cumulative (e.g. weekly, monthly, yearly) evapotranspiration data can be calculated.
"A general 2-4 inches of rain will fall along the lower elevations of the California coast but with 4-8 inches in the west- and southwest-facing slopes of the coastal mountains with a Local ...
The Standardized Precipitation Evapotranspiration Index (SPEI) is a multiscalar drought index based on climatic data. It was developed by Vicente-Serrano et al. (2010) at the Institute Pirenaico de Ecologia in Zaragoza, Spain . [ 1 ]