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Sea Ice Index

evidence

A continuous, consistently processed record of sea-ice extent in both hemispheres exists from 1979, from which the Arctic September minima of 2007 (approximately 4.2 million km2) and 2012 (approximately 3.4 million km2) and the Antarctic February minima of 2022 and 2023 (the first below 2 million km2 in the record, and lower again the following year) are drawn. V55 VERIFICATION BASIS: nsidc.org was probed during production and refused by the network egress proxy, and the WebSearch budget was exhausted. EVERY NUMERIC VALUE IN THIS RECORD IS APPROXIMATE AND UNCHECKED, given to one or two significant figures for that reason. A curator must replace them with values read from the Sea Ice Index before publication.

A evidence is not a place. Drawing it on a map would assert something about the world that no stored fact supports.

Evidence · 0

This object cites no evidence.

Timeline

No dated observations are stored for this object. Atlas shows what was observed and when — it does not infer a history.

Connections · 0
    Assembled narrative · 0

    This object does not clear the publishing floor: an assembled narrative needs a description and at least one cited piece of evidence.

    Observed changes · 0

    No public Signals are attached to this object. Signals show what changed and when it was observed — never a direction or a rank.

    Actions

    Read the assembled narrativeThis object has no public Experience: one needs a description and at least one cited piece of evidence.Continue in StudioOpen TwinTwin does not start a decision from this kind of object.ShareSaveSaved objects are part of the authenticated projection, which is declared and not yet built.

    /atlas?object=EVIDENCE_EV_POLES_NSIDC_SEA_ICE_INDEX