First published 10/1/2026, 7:31:15 PM · Last updated 10/1/2026, 7:31:30 PM

Ammonium upwelling and alternative nitrogenase enzymes as drivers of isotopically depleted δ15N signatures during OAE 3 in the Western Interior Seaway

A peer-reviewed journal article published 2026-12-01 proposes that ammonium upwelling and alternative nitrogenase enzymes explain depleted δ15N signatures during OAE 3 in the Western Interior Seaway. The supplied excerpt only names the publisher and article type and provides no additional details.

Categories: science-and-space, environment-and-climate

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 6/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 3/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 2/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Positivity: 5/10How harmful or beneficial the event is, from strongly harmful (1) to strongly positive (10).
Urgency: 1/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Why it matters

The paper presents a scientific explanation for isotope patterns associated with OAE 3 in a named paleogeographic region.

Sources

Ammonium upwelling and alternative nitrogenase enzymes as drivers of isotopically depleted δ15N signatures during OAE 3 in the Western Interior Seaway

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