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7 December 2012
Aerial surveys make light work of snow-depth measurements
Scientists have recently developed a technique for sharpening the accuracy of detailed tundra snow-depth maps critical to issues ranging from climate modeling to figuring out where to herd grazing caribou. “Budgets for observing the snow are comparatively small, and the area to observe is comparatively large,” said geophysicist Chris Polashenski with the U.S. Army Corps of Engineers. “So, efficiency is key.” One innovation in snow-depth measurements has been the …
15 December 2010
3D movies of the Earth as it changes
No sooner did I wish for a 3D movie at AGU, than I got one. Late on Tuesday USGS scientist Gerald Bawden presented some of his latest work and upcoming projects in the Bowie Lecture (G24A) Ultra-High Resolution Four Dimension Imaging Across the Earth Sciences – with fabulous 3D movies. Red and blue glasses on, the audience visited such places as the sheer rock walls above Yosemite’s Valley Floor; flew above, around and through Bay Area bridges, and visited the burned hillsides of southern California.