Elín Bjarnadóttir
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A research question before a sensor
Use a hypothetical river-water question to work backwards from a real concern to sampling, competing explanations, maintenance, and a defensible measurement.
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When the ground moves beneath the ruler
A repeated thaw depth can hide a moving surface. Reference conventions, probe refusal, seasonal timing, and survey history keep comparisons honest.
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The muddiest water may not carry the most sediment
Concentration is only part of sediment transport. Water flow, event timing, particle properties, and representative sampling complete the picture.
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The lake with no visible outlet
Seasonal floods and hidden subsurface pathways connect northern waters. Yukon Flats research shows why a shrinking shoreline is not a complete diagnosis.
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A cracked road needs more than a thaw map
Settlement, erosion, drainage, and slope movement are different infrastructure problems. Start with the service at risk and the evidence for its failure.
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The active layer is not the permafrost
Seasonal thaw depth, ground temperature, and ground-ice content answer different questions. A guide to naming the layer before naming the change.
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When an Arctic river turns orange
Thaw, mineral exposure, changing river chemistry, and the limits of sparse water-quality monitoring.