Arctic Swirls

These colorful swirls show sediment and organic matter carried into the Arctic Ocean. Like dyes or tracer particles in a lab experiment, this run-off reveals the complicated patterns of mixing where freshwater and salt water mix. Delicate as they appear, these eddies are tens of kilometers across. Zoom in on the full resolution image to really appreciate the details, like the feathery edges between layers. (Image credit: N. Kuring; via NASA Earth Observatory)

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