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An evaporation pan is used to hold water during observations for the determination of the quantity of evaporation at a given location. Such pans are of varying sizes and shapes, the most commonly used being circular or square. [3] The best known of the pans are the "Class A" evaporation pan and the "Sunken Colorado Pan". [4]
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.
The University of Nebraska–Lincoln (UNL) reported that "climate change poses significant risks to Nebraska's economy, environment and citizens". [1] This view is expanded upon by the United States Environmental Protection Agency: "Nebraska's climate is changing. In the past century, most of the state has warmed by at least one degree (F).
Data is initially received and analyzed by local NWS offices then ultimately stored and analyzed by NCEI, which also does final data quality checks. [2] The program began with act of Congress in 1890 [ 1 ] and grew out a network of observers developed by the Smithsonian Institution . [ 3 ]
Hydrology considers evaporation of various forms: from water surfaces; as transpiration from plant surfaces in natural and agronomic ecosystems. Direct measurement of evaporation can be obtained using Simon's evaporation pan. Detailed studies of evaporation involve boundary layer considerations as well as momentum, heat flux, and energy budgets.
The US data is collected and compiled into an annual evaporation map. The measurements range from under 30 to over 120 inches (3,000 mm) per year. Because it typically takes place in a complex environment, where 'evaporation is an extremely rare event', the mechanism for the evaporation of water is not completely understood.
The University of Nebraska is planning a $450 million renovation of the Cornhuskers’ football stadium in Lincoln and at the same time looking to cut millions of dollars from the university ...
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]