Ancient DNA × Climate Signal Explorer
A shared-hosting visualizer for comparing binned ancient DNA allele-frequency trajectories with paleoclimate proxy records, designed as a heuristic research instrument rather than a deterministic selection test.
From temporal samples to research questions
This tool gives students and researchers a clean first-pass way to ask whether a genetic trajectory and an environmental proxy deserve deeper modeling. It bins dated ancient samples, estimates derived allele frequency by time window, overlays a climate proxy, and preserves local methodological comments without requiring MySQL.
The display is exploratory. Apparent overlap between climate movement and allele-frequency movement should be treated as hypothesis generation only. Formal inference requires demographic modeling, ascertainment controls, radiocarbon uncertainty handling, population continuity assessment, and locus-specific selection methods.
Interpretive scope
Outputs are bands, summaries, and visualization prompts. They are not proof of adaptation, migration, replacement, drift, or selection.
The default data are synthetic demonstration rows structured after common aDNA and paleoclimate tables. Replace them with properly cited, permission-compliant datasets before public interpretation.
Visualizer
Use the demo data or load local CSV files in the expected formats. Files are processed in the browser and are not uploaded.
| Years BP bin | n alleles | Allele count | Frequency | Approx. 95% band | Nearest proxy |
|---|
Local CSV inputs
Sample CSV can be long form with columns sample_id,region,date_BP,snp,dosage, or wide form with sample_id,region,date_BP,rsID. Dosage is interpreted as 0, 1, or 2 derived alleles; negative or missing values are excluded.
Climate proxy format
Climate CSV requires years_BP,proxy_name,proxy_value. The visualizer matches each genetic time bin to the nearest proxy observation. Proxy sign and interpretation remain dataset-specific and must be explained in any publication note.
Recommended practice: cite the original proxy archive and the published study, not only the downloaded file.
Methodological Note
The methodological note is displayed inline for review and annotation. The embedded viewer uses Google PDF Viewer so the PDF remains readable in-page without the browser iframe open control.
If the embedded PDF does not render before deployment, confirm that methodology_note.pdf is uploaded beside this index file and is publicly reachable by Google Viewer.
Scholarly Questions and Additions
This annotation area uses a no-database PHP self-postback. Submissions append to annotations.json in this directory.
No annotations yet.