Folks:
(1) Five time lapse videos (satellite image stills in animated format, actually, but still fascinating) of earth changes in selected areas such as Dubai, Aral Sea, and so on:
http://www.wired.com/wiredscience/2009/05/earthobservatoryvideos/
This make a nice companion to the historical Landsat data and tools released by Esri last week: http://www.esri.com/landsat.
(2) History Database of the Global Environment
http://themasites.pbl.nl/en/themasites/hyde/index.html
Data is downloadable too and able to be brought into a GIS environment.
(3) I have written 3 new lessons that invites spatial inquiry into tornadoes. The first uses web GIS (ArcGIS Online) and takes place entirely within the web browser, where students examine the Tuscaloosa tornado, measuring its width and length, and examining before-and-after imagery, and more. The second invites analysis of 50 years worth of tornado touchdowns and tracks by year and by season, examining injuries, fatalities, and intensity, and also elevation and proximity to cities, using ArcGIS as the anlaytical toolkit. The third invites students to investigate one day's worth of tornadoes, wind, and hail, for 22 April 2011, the day of the St Louis airport tornado, and then they access the NOAA storms site and download a different day's worth of storms, comparing and contrasting. They also use ArcGIS desktop software to compute such things as the mean center and standard deviational ellipse for each type of storm. These are all freely available via http://edcommunity.esri.com/arclessons. Search on "tornado" and you will find the lessons and data to begin these investigations.
Joseph Kerski
Joseph J. Kerski, Ph.D.| Education Manager
Esri | 1 International Court | Broomfield CO 80021-3200 | USA
Tel 303-449-7779, ext. 8237 | Fax 303-449-8830
Twitter: @josephkerski
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