A long‑observed balance in how much light the Northern and Southern hemispheres reflect is now diverging: both are darkening, but the Northern Hemisphere is darkening faster. Using 24 years of CERES satellite data, NASA’s Norman Loeb and colleagues show the shift challenges the idea that cloud dynamics keep hemispheric albedo roughly equal.
— A persistent change in planetary reflectivity—and its hemispheric asymmetry—affects Earth’s energy budget and challenges assumptions in climate models that guide policy.
Syris Valentine
2025.12.03
65% relevant
Both items report that formerly stable assumptions in Earth system science are breaking down: Nautilus summarizes a Nature paper arguing the PDO may be shifting into a persistent state with decades of drying, while the existing idea documents a hemispheric albedo asymmetry—together these suggest familiar climate‑system buffers and teleconnections cannot be taken for granted.
msmash
2025.12.01
65% relevant
SRM directly aims to alter planetary albedo; the UK’s caution links to scientific findings about hemispheric reflectivity changes and the uncertain climate consequences of deliberately changing radiative balance.
Fiona Spooner
2025.12.01
30% relevant
Both articles use global‑scale observational datasets to reveal planetary shifts that are underappreciated; while one is about radiative balance and the other about biomass composition, together they argue for more emphasis on systemic, measurable planetary indicators in policy (e.g., biomass composition as an ecological indicator complementing albedo and energy budgets).
msmash
2025.10.02
100% relevant
PNAS study led by NASA Langley’s Norman Loeb analyzing CERES observations since 2000 finds emerging hemispheric albedo asymmetry.