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100517_6699

Ian Howat, glaciologist with Ohio State University, resurveys, with modern GPS, an old ground control point established by the USGS in an early study of the Columbia Glacier, Chugach Mountains, Alaska. Resurveying will allow old and new data to be linked to precisely quantify, from the late 1970s to present, the dramatic retreat of the glacier.

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Filename: 100517_6699.JPG
Copyright: Ethan Welty
Image Size: 1000x667 / 144.2KB; www.weltyphotography.com; North America USA Alaska Columbia Glacier color image scientist research field work science glaciology horizontal outdoors day one person young adult man Caucasian alpine snow mountain cold
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Ian Howat, glaciologist with Ohio State University, resurveys, with modern GPS, an old ground control point established by the USGS in an early study of the Columbia Glacier, Chugach Mountains, Alaska. Resurveying will allow old and new data to be linked to precisely quantify, from the late 1970s to present, the dramatic retreat of the glacier.