SourceScore
Academic

PNAS

pnas.org ↗

Proceedings of the National Academy of Sciences — multidisciplinary peer-reviewed journal since 1914.

SourceScore Index
A·92Composite weighted across Discipline, Modern Reference, and Velocity.

A — top-tier multidisciplinary peer-reviewed journal with strong open access.

Citation Discipline
A+·96

Peer-reviewed by NAS members; rigorous review across all sciences; corrections + retractions public.

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Modern Reference
A·88

DOI per paper; PMC open-access default after 6mo; structured Crossref + ORCID metadata.

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Citation Velocity
A·90

Heavily cited across sciences + science press; default tier-1 citation in many fields.

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Signals behind these scores

Citation Discipline

A+·96
  • NAS-affiliated peer review
    Three-track review (NAS member, contributed, direct submission); standardized rigor.

Modern Reference

A·88
  • Open-access policy
    All content open after 6-month embargo; many papers immediately open.

Citation Velocity

A·90
  • Cross-disciplinary citation
    Cited across biology, physics, social sciences, climate.

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SourceScore (v0.1). (2026). PNAS: SourceScore Index 92 (A). Retrieved from https://sourcescore.org/source/pnas/

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