# $ICE · Arctic sea ice

The area of the Arctic Ocean covered by at least 15% sea ice each day, in square kilometres, as the US National Snow and Ice Data Center measures it from satellites (Sea Ice Index, version 4, daily file). A day with part of the area missing is left out.

| Field | Value |
| --- | --- |
| Newest complete period | Nov 11: 8,838,000 square kilometres, score 28, Normal |
| Source | National Snow and Ice Data Center, Sea Ice Index version 4 (G02135), Northern Hemisphere daily extent (https://nsidc.org/data/g02135/versions/4) |
| Terms | Free to use. NSIDC asks every user to cite the data set. |
| Cadence | Daily, one day late |
| Grade | display |
| Rulebook | Rulebook v0.2, 2026-10-04 |

## Settlement

Why this grade: The newest days are near real time and can be reprocessed, which moves a day already printed; the record keeps the revision. Shown, not settled on.
What it costs to move: Not possible. It is the Arctic.
When the source is late: A day prints when NSIDC posts it. A day with missing area stays open. A day NSIDC never posts is void.
Precision: Whole square kilometres: the published extent in millions of square kilometres, three decimals, times 1,000,000.

## As first published, and the proof

Not on-chain yet. The newest complete period goes on-chain with the daily proof at 12:40 UTC.

## Last 30 complete periods

| Period | Level | Change | Band |
| --- | ---: | ---: | --- |
| Nov 11 | 8,838,000 square kilometres | +1.4% | Normal |
| Nov 10 | 8,713,000 square kilometres | +0.6% | Normal |
| Nov 9 | 8,658,000 square kilometres | +0.9% | Normal |
| Nov 8 | 8,580,000 square kilometres | +0.4% | Normal |
| Nov 7 | 8,547,000 square kilometres | +1.4% | Normal |
| Nov 6 | 8,425,000 square kilometres | +1.4% | Normal |
| Nov 5 | 8,311,000 square kilometres | +0.8% | Normal |
| Nov 4 | 8,241,000 square kilometres | +1.1% | Normal |
| Nov 3 | 8,153,000 square kilometres | +0.2% | Normal |
| Nov 2 | 8,135,000 square kilometres | +1.5% | Normal |
| Nov 1 | 8,016,000 square kilometres | +2.2% | Normal |
| Oct 31 | 7,840,000 square kilometres | +1.1% | Normal |
| Oct 30 | 7,755,000 square kilometres | +0.2% | Normal |
| Oct 29 | 7,743,000 square kilometres | +0.9% | Normal |
| Oct 28 | 7,673,000 square kilometres | +0.9% | Normal |
| Oct 27 | 7,601,000 square kilometres | +1.0% | Normal |
| Oct 26 | 7,525,000 square kilometres | +1.2% | Normal |
| Oct 25 | 7,438,000 square kilometres | +1.3% | Normal |
| Oct 24 | 7,344,000 square kilometres | -0.3% | Normal |
| Oct 23 | 7,364,000 square kilometres | +2.6% | Elevated |
| Oct 22 | 7,178,000 square kilometres | +3.2% | Elevated |
| Oct 21 | 6,954,000 square kilometres | +2.0% | Normal |
| Oct 20 | 6,817,000 square kilometres | +0.4% | Normal |
| Oct 19 | 6,792,000 square kilometres | +0.2% | Normal |
| Oct 18 | 6,777,000 square kilometres | +0.9% | Normal |
| Oct 17 | 6,717,000 square kilometres | -0.2% | Normal |
| Oct 16 | 6,731,000 square kilometres | -1.1% | Normal |
| Oct 15 | 6,809,000 square kilometres | +4.1% | High |
| Oct 14 | 6,538,000 square kilometres | +3.3% | Elevated |
| Oct 13 | 6,330,000 square kilometres | +0.5% | Normal |

JSON: https://tickerz.com/api/indices/ice

## Asked often

**How much Arctic sea ice is there today?** Sea ice covered 8,838,000 square kilometres of the Arctic on Nov 11 2026, as the National Snow and Ice Data Center measures it from satellites.

**Where does the $ICE number come from?** Tickerz reads it from National Snow and Ice Data Center, Sea Ice Index version 4 (G02135), Northern Hemisphere daily extent. Daily, one day late. Each number is kept as it was first published, with a timestamped proof, and any later revision is shown beside it.

**Can I download the $ICE data?** Yes, free and with no key: the full history as JSON at https://tickerz.com/api/indices/ice and every period as CSV at https://tickerz.com/api/indices/ice/history.csv.

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