ALERTS(beta) user guide - Planetary Skin Institute

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54)/)1&E)()&:001' Spatial data tools provide a variety of useful tools to assist users in their analysis, store favorite locations, and conduct measurements. Polygon Drawing Tools Allows you to draw a polygon of interest Disturbance Analysis Toolbar This icon reopens the Disturbance analysis toolbar if you’ve closed it or will close it if opened History Toolbar This icon is for history and is not functional at this time since history doesn’t close at this time. Spatial measurements These tools are for measuring distance, area, and so forth.
!10'')*F&0;&("*3' ALERTS – Automated Land change Evaluation, Reporting and Tracking System. An application developed by the Planetary Skin Institute to help create global transparency for land cover change Aqua - Aqua is a NASA Earth Science satellite mission named for the large amount of information that the mission will be collecting about the Earth's water cycle. Additional variables also being measured by Aqua include radiative energy fluxes, aerosols, vegetation cover on the land, phytoplankton and dissolved organic matter in the oceans, and air, land, and water temperatures. CASA model – The NASA-CASA (Carnegie-Ames-Stanford Approach) model simulates net primary production (NPP) and soil respiration (Rh) at regional to global scales. Disturbance – In the ALERTS platform, a disturbance refers to a significant disruption in land cover identified by a break in the vegetation signal of a given area over time. At present, these disturbances are detected by GOPHER, a class of algorithms developed by computer scientists at the University of Minnesota EVI – The Enhanced Vegetation Index. EVI is an 'optimized' index generated from MODIS sensor data designed to enhance the vegetation signal with improved sensitivity in high biomass regions and improved vegetation monitoring through a de-coupling of the canopy background signal and a reduction in atmosphere influences. The GOPHER algorithms use EVI data at 1km and 250m resolution to detect disturbances. FPAR - FPAR is the Fraction of Absorbed Photosynthetically Active Radiation that a plant canopy absorbs for photosynthesis and growth in the 0.4 – 0.7nm spectral range. FPAR is expressed as a unitless fraction of the incoming radiation received by the land surface and is derived from MODIS sensor data. GOPHER. GOPHER stands for Global Observation of Planetary Health and Environmental Resources. GOPHER refers to a class of data mining algorithms developed by the Department of Computer Science at the University of Minnesota. These algorithms are capable of detecting meaningful breaks in vegetation signals over time and identifying them as disturbances.
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ALERTS(beta) user guide - Planetary Skin Institute

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