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Posts Tagged ‘evapotranspiration’

World’s average annual evapotranspiration web map from Esri

Wednesday, June 20th, 2012

Most of us understand the hydrologic cycle in terms of the visible paths that water can take: rainstorms, rivers, waterfalls, swamps, etc.  Hydrology takes a different path through a larger volume of water that flows through the air through evaporation and transpiration.  This is very different from hydrology as we think of it traveling through visible paths such as waterfalls, streams, rivers, rainstorms, and swamps,etc. Evaporation and transpiration claim 61% of all terrestrial precipitation, and together are referred to as evapotranpsiration.  Esri’s Mapping Center has produced a web map showing the world’s average annual evapotranspiration to understand how this process works.

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Drought mapping using measurements obtained from weather and research satellites

Monday, February 13th, 2012

The National Oceanic and Atmospheric Administration’s (NOAA) Center for Climate Prediction holds a monthly drought briefing by teleconference to identify the latest drought areas in North America, according to  Don Comis of the USDA Agricultural Research Service (ARS). ARS scientists, Martha Anderson and Bill Kustas, are hoping that in a year or so, data from their computer model/satellite package will give evapotranspiration (ET) maps a seat at that briefing.

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