Claim

The threshold findings came from a 39-day spring-2023 experiment using twelve 6-m³ mesocosms of temperate-eutrophic, diatom-dominated German North Sea water at Helgoland, contrasting immediate and delayed dilution; thresholds use measured post-mixing D7 alkalinity, and the study cautions that reduced-mixing deployment scenarios may have a more constrained safe operating space.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 25492

49 words; atomic claims are usually under 25a conjunction joins clauses that may be separately evaluablea comma-separated series may list several propositions

Referenced 98 times: checked 0, looked up by assistants 0, viewed 98, shared 0. A count of attention, not evidence.

Topics

Not filed under any topic yet.

Assessment

Supported

Score: 0.9955 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 1 counted · 2 by the author only

3 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:2d0be9e1-1802-878b-a35a-5cbbfbd6a48e

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.

Related: NARROWS outgoing: Supported

Why?

Strongest counted support: The study cautioned that reduced-mixing deployment scenarios may have a more constrained safe operating space. weight 1.800000 evidence

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

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

Hide calculation

0.9955 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 3 sources, 3 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:61faedb21b120ca4170eeff07524390b14a8370fc506699b922741e58a4f55e2

Last changed at entry seq 25505; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
56b8392e support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
420a9909 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
8f39e65a support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000

prior 0.50 → log-odds 0.000000 + 5.400000 (the counted weights) = 5.400000 → probability 0.9955

Under neighbouring settings of the same model: 0.9777 to 0.9991, a spread of 0.0214.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Evidence for

The study used a 39-day spring-2023 experiment with twelve 6-m³ mesocosms in the German North Sea and immediate versus delayed dilution.

From Spring phytoplankton bloom dynamics reveal thresholds of ocean alkalinity enhancement in the North Sea Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The study defined biological thresholds using measured post-mixing D7 alkalinity.

From Spring phytoplankton bloom dynamics reveal thresholds of ocean alkalinity enhancement in the North Sea Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The study cautioned that reduced-mixing deployment scenarios may have a more constrained safe operating space.

From Spring phytoplankton bloom dynamics reveal thresholds of ocean alkalinity enhancement in the North Sea Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

None.

Suppressed as dependent

None.

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

From	Relationship	To
fbd6a48e	NARROWS	36d7f20d

Review checklist

Review checks: 1 of 4

2 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK. 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	56b8392e, 420a9909, 8f39e65a

Summary

Supported. The main support is: The study cautioned that reduced-mixing deployment scenarios may have a more constrained safe operating space. cebec2cf

A search for evidence in the opposing direction found something; see the counted evidence. 3ad7d972

Review checks: 1 of 4. coverage:2d0be9e1-1802-878b-a35a-5cbbfbd6a48e

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
25492	APPENDED
25493	ACCEPT	AUTOMATIC_AFTER_VALIDATION
25504	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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  "contested": false,
  "stability": "HIGH",
  "claim_type": "QUANTITATIVE",
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  "snapshot_seq": 25505,
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  "support_groups": 3,
  "model_dependent": false,
  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "SUPPORTED",
  "review_checklist": {
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    "opposing_search_done": {
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      "ok": true
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  "contradict_groups": 0,
  "rounding_boundary": false,
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  "not_applicable_reason": null,
  "independence_unreviewed": 3
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