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1. Roosevelt Island Ice Core Density and Beta Count Data [NSIDC-0139]
This data set measures the radioactive decay of nuclear material from Northern and Southern hemisphere nuclear testing. Firn cores were taken from three locations on Roosevelt Island, an ice dome ...

2. Annual Layers at Siple Dome, Antarctica, from Borehole Optical Stratigraphy [NSIDC-0515]
Researchers gathered data on annual snow layers at Siple Dome, Antarctica, using borehole optical stratigraphy. This data set contains annual layer depths and firn optical brightness. The brightness ...

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