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Taking Scientific Measurements19 viewsDetermining instrument location by theodolite. A theodolite is a high-precision surveying instrument. Because the ice floes rotated and changed in topography as they drifted, undergoing freezing and thawing, station members needed to regularly determine the position of the instruments relative to each other and to North. Image credit: EWG.
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300 viewsAreas that contain much permafrost can look barren. But plants and animals prosper here in the summer days, when the top layer of frozen ground thaws. The caribou in this photograph, in the Noatak National Preserve, Alaska, are migrating in the early fall.
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173 viewsThe nearby lake in Kanger, called Tasersuatsiaq in Greenlandic, but also known as Lake Ferguson. The lake is frozen in this photo but had thawed by the time I returned in mid-June. The building is the local row club, as rowing is popular here in the summer. The lake is home to a kind of fish called Arctic char.
Photo by John Maurer, CIRES/NSIDC, University of Colorado.
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