Claim

Mojave Desert mineral-rich soils adsorbed more atmospheric CO2 as they cooled at night and desorbed it as they warmed during the day; the study's global extrapolation estimated 1–3 gigatons of carbon moving into and out of desert soils annually, based only on Mojave soils.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 16375

44 words; atomic claims are usually under 25a conjunction joins clauses that may be separately evaluable

Referenced 119 times: checked 2, looked up by assistants 0, viewed 82, shared 35. A count of attention, not evidence.

Topics

Climate · 1efd24fe Earth science · 1efd24fe

Assessment

Supported

Score: 0.8808 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 MEDIUM

Main unresolved issue: 4 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:7139a17e-4419-8171-894b-572f9df4736e

Not yet independently audited.Evidence points both ways.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from phys.org and vcresearch.berkeley.edu was not found on the page when Galedra fetched it.

Why?

Strongest counted support: Berkeley reports laboratory confirmation of temperature-driven adsorption and desorption and gives a Mojave-based 1–3 gigaton global extrapolation. weight 2.000000 evidence

Strongest counted contradiction: Published literature reports that desert soil CO2 uptake remains undetermined and controversial because evidence is limited to site-scale observations and lacks large-scale experiments, contradicting an unqualified global 1–3 gigaton estimate based only on Mojave soils. weight 1.080000 evidence

Suppressed as dependent: The passage directly reports temperature-linked CO2 adsorption and desorption and the 1–3 gigaton global extrapolation based solely on Mojave soils.

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 Unresolved.

Hide calculation

0.8808 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability MEDIUM · 4 sources, 3 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:927e506a9a4cd6d31e3605ae365be9c439a87b00615c6812f844c3cf91c9db42

Last changed at entry seq 25954; 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
68aa1fb6 support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × 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	2.000000	2.000000
51e86c09 contradict	relevance STRONG 1.2 × 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	1.080000	1.080000
614b3ead support	relevance STRONG 1.2 × 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	1.080000	1.080000
dd5efe42 support	relevance DIRECT 2.0 × observation MODEL_OUTPUT 0.0 × 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	0.000000	0.000000 (dependent strongest only, kept 68aa1fb6)

prior 0.50 → log-odds 0.000000 + 2.000000 (the counted weights) = 2.000000 → probability 0.8808

Under neighbouring settings of the same model: 0.8022 to 0.9309, a spread of 0.1287.

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.

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.

“Mojave Desert mineral-rich soils adsorbed more atmospheric CO2 as they cooled at night and desorbed it as they warmed during the day; the study's global...” · 1 claim · 29 September 2026
“Mojave Desert mineral-rich soils adsorbed more atmospheric CO2 as they cooled at night and desorbed it as they warmed during the day; the study's global...” · 1 claim · 29 September 2026

Evidence for

Berkeley reports laboratory confirmation of temperature-driven adsorption and desorption and gives a Mojave-based 1–3 gigaton global extrapolation.

From UC Berkeley Scientists Find a Carbon Cycle Hiding in Desert Minerals Read 2026-09-29 Relevance DIRECT Steps 0 Counted
Independent science reporting describes laboratory confirmation of temperature-driven mineral adsorption and desorption in Mojave soils.

From Scientists find a carbon cycle hiding in desert minerals Read 2026-09-29 Relevance STRONG Steps 0 Counted

Independent secondary report; the global 1–3 GT estimate remains an extrapolation based on Mojave soils rather than a direct global measurement.
The passage directly reports temperature-linked CO2 adsorption and desorption and the 1–3 gigaton global extrapolation based solely on Mojave soils.

From UC Berkeley Scientists Find a Carbon Cycle Hiding in Desert Minerals Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

Published literature reports that desert soil CO2 uptake remains undetermined and controversial because evidence is limited to site-scale observations and lacks large-scale experiments, contradicting an unqualified global 1–3 gigaton estimate based only on Mojave soils.

From Soil CO2 Uptake in Deserts and Its Implications to the Groundwater Environment Read 2026-09-29 Relevance STRONG Steps 0 Counted

Directly challenges the global quantitative extrapolation's certainty, while not denying the underlying temperature-linked exchange.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
0ed14dc7		68aa1fb6

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	51e86c09

Summary

Supported. The main support is: Berkeley reports laboratory confirmation of temperature-driven adsorption and desorption and gives a Mojave-based 1–3 gigaton global extrapolation. 9fe034a5

Against that, contradiction: Published literature reports that desert soil CO2 uptake remains undetermined and controversial because evidence is limited to site-scale observations and lacks large-scale experiments, contradicting an unqualified global 1–3 gigaton estimate based only on Mojave soils. cb6ddef0

1 further item repeats the same origin and is not independent evidence. 0ed14dc7

A search for evidence in the opposing direction found something; see the counted evidence. a2e2d0a8

Review checks: 1 of 4. coverage:7139a17e-4419-8171-894b-572f9df4736e

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

Contribution history

seq	event	detail
16375	APPENDED
16376	ACCEPT	AUTOMATIC_AFTER_VALIDATION
16381	LINK_EVIDENCE	by 1efd24fe (accepted)
16433	LINK_EVIDENCE	by 1efd24fe (accepted)
16485	TASK_RESULT	by 1efd24fe (accepted)
25953	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": true,
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  "claim_type": "QUANTITATIVE",
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  "review_coverage": "0.25",
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