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.
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.
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.
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.
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.
Snow on sea ice has two seasons
Why a snow blanket can slow winter ice growth yet delay spring melt, and why depth, density, timing, and wind redistribution belong in the comparison.
How old is that sea ice?
Ice-age colours track survival and movement, not every floe's thickness. Learn what the oldest category in a grid cell reveals, conceals, and cannot promise.
Extent and volume tell different ice stories
A worked example separates extent, area, and volume, then shows why wind, thickness estimates, seasonal timing, and model uncertainty can make ice graphs tell different stories.
At the ice edge north of Svalbard
A careful reading of melt ponds, pressure ridges, kittiwakes, wildlife distance, and younger sea ice.
Choose the journeys that matter
Avoid, shift, and improve travel choices while recognizing the limits imposed by infrastructure.
Listening for narwhals in Baffin Bay
What a hydrophone can record about narwhal calls, vessel noise, and uncertainty in a changing soundscape.
Keep the heat you already paid for
Draught proofing, sensible settings, maintenance, renter options, and the case for better buildings.
When an Arctic river turns orange
Thaw, mineral exposure, changing river chemistry, and the limits of sparse water-quality monitoring.
A week of plant-rich dinners
Seven flexible dinners built around affordability, leftovers, balance, and less food waste.
Rain on snow across the tundra
How ice crust can affect winter forage, why community observation matters, and why one event is not a trend.
Buy less, repair more
A decision checklist for keeping products useful, borrowing, repairing, and avoiding rebound consumption.
Measuring a glacier in footsteps
Ablation stakes, mass balance, the 2025 Greenland result, and the patient work of repeated measurement.
Move your money and your voice
Questions for pensions, banks, procurement, voting, and community action without simple good-or-bad labels.
A midnight-sun tundra plot
Shrubs, insects, migratory birds, tundra greenness, and the daily rhythm around a small monitoring plot.
Seven days to a lighter routine
A realistic week combining travel, heat, meals, repair, and collective action.