Field journal
Notes on evidence, field methods, uncertainty, and the changing Arctic.
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Testing a changing Arctic food web
A Bering and Chukchi Sea synthesis tests borealization against a different food-web mechanism. Mixed species responses, sampling gaps, and an exceptional first year sharpen the conclusion.
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What an ice chart cannot promise
Valid times, egg codes, partial concentrations, and chart coverage matter. Learn why a regional ice analysis cannot guarantee route connectivity, local strength, or a safe journey.
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A sea-ice pixel is not a habitat map
Identical ice concentrations can conceal different floes, openings, and feeding opportunities. Habitat interpretation needs geometry, seabed context, compatible dates, and evidence of what animals actually use.
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Distance is part of wildlife observation
A minimum distance is not a target. Compare two ways of taking the same photograph, and consider duration, crowding, local authority, sensitive locations, and research permissions.
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Counting the seals you cannot see
Aerial counts miss seals in water and snow lairs. Haul-out research shows how availability, visibility, survey conditions, and sampling determine what a population estimate can mean.
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A quiet recording is not an empty sea
Recording schedules, changing noise, call rates, and detector thresholds shape acoustic non-detections. A worked comparison shows why silence is not a census of absence.
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The warmth beneath the Arctic surface
Atlantic-origin warmth can sit below cold surface water. Density layers, currents, and mixing determine when stored ocean heat becomes heat delivered to sea ice.
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The bloom can begin before open water
Under-ice blooms complicate the seasonal calendar. Light transmission, nutrients, consumer timing, and satellite blind spots explain why open water is not the food web’s starting gun.
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A drifting instrument is not a fixed station
A rising temperature line may record movement through a water-mass boundary. Following position, depth, and salinity helps distinguish spatial structure from change through time.