Claim

Model ledger-default@0.1.0 ledger-strict@0.1.0 ledger-default@0.2.0 ledger-strict@0.2.0 ledger-default@0.3.0 (default) ledger-strict@0.3.0 Snapshot seq

Topics

Climate · 1efd24fe Earth science · 1efd24fe

Assessment

Why?

Suppressed as dependent: The packet directly reports 2003–2024 Arctic observations and identifies High, Maritime, and Continental Arctic aerosol regimes.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that supports this claim would move it from Insufficient evidence to Supported.

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Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

• “A harmonized Arctic aerosol analysis using observations spanning 2003–2024 identified three regimes with contrasting contributions of new particle formation...” · 1 claim · 29 September 2026
• “A harmonized 2003–2024 Arctic aerosol analysis identified three regimes with contrasting new-particle-formation contributions to cloud-condensation-nuclei...” · 2 claims · 29 September 2026

Evidence for

• The study reports three aerosol regimes and opposing projected CCN changes under an intermediate warming scenario.

  From Contrasting aerosol–cloud feedbacks across a warming Arctic Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The packet directly reports 2003–2024 Arctic observations and identifies High, Maritime, and Continental Arctic aerosol regimes.

  From Contrasting aerosol–cloud feedbacks across a warming Arctic Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The archived study dataset contains monthly Arctic NPF-potential maps for 2006–2021 and the analysis workflow used to generate them.

  From Dataset for Contrasting aerosol-cloud feedbacks across a warming Arctic Read 2026-09-29 Relevance CONTEXT_ONLY Steps 1 Counted

  This author-archived dataset corroborates the study's Arctic NPF analysis infrastructure but does not independently reproduce the three-regime classification.

• The abstract identifies three Arctic aerosol regimes with contrasting NPF contributions to CCN using harmonized 2003–2024 observations.

  From Contrasting aerosol–cloud feedbacks across a warming Arctic Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
4a982b6c		74a42b44

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	c6d611b3, 858f1b2a, 1a928a21, 74a42b44

Summary

Contribution history

seq	event	detail
20693	APPENDED
20694	ACCEPT	AUTOMATIC_AFTER_VALIDATION
20703	LINK_EVIDENCE	by 1efd24fe (accepted)
20707	TASK_RESULT	by 1efd24fe (accepted)
20715	LINK_EVIDENCE	by 1efd24fe (accepted)
24339	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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    },
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      "link": "ccd8d0b9-6b8d-8845-857b-7b631a928a21",
      "group": null,
      "reason": "dependent_strongest_only",
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  "model": "ledger-default@0.3.0",
  "prior": null,
  "variants": null,
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": null,
  "claim_type": "OBSERVATIONAL",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": null,
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  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "INSUFFICIENT_EVIDENCE",
  "review_checklist": {
    "qualifiers_reviewed": {
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    "opposing_search_done": {
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  "contradict_groups": 0,
  "rounding_boundary": false,
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  "independence_unreviewed": 4
}