{"id":"W1512802592","doi":"10.1029/2006gb002897","title":"A 15,800‐year record of atmospheric lead deposition on the Devon Island Ice Cap, Nunavut, Canada: Natural and anthropogenic enrichments, isotopic composition, and predominant sources","year":2007,"lang":"en","type":"article","venue":"Global Biogeochemical Cycles","topic":"Heavy metals in environment","field":"Environmental Science","cited_by":93,"is_retracted":false,"has_abstract":true,"ca_institutions":"Geological Survey of Canada; Natural Resources Canada","funders":"","keywords":"Ice core; Younger Dryas; Geology; Weathering; Enrichment factor; Atmosphere (unit); Deposition (geology); Environmental science; Physical geography; Sediment; Environmental chemistry; Holocene; Oceanography; Geochemistry; Chemistry; Heavy metals; Geography; Geomorphology","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0001758057,0.0002653679,0.0002003064,0.001461733,0.001200987,0.0007575791,0.0004574954,0.0002063438,0.0006923098],"category_scores_gemma":[0.0002980894,0.0001815025,0.0001560437,0.001641391,0.0005027676,0.0001744254,0.00043383,0.0002177964,0.0001508807],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.008447779,"about_ca_system_score_gemma":0.005390309,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.976115,"about_ca_topic_score_gemma":0.9907662,"domain_scores_codex":[0.9999096,0.00000407558,0.000005400641,0.00002480167,0.00002840684,0.00002777864],"domain_scores_gemma":[0.9995601,0.00001936006,0.00004094595,0.00001266121,0.0002643134,0.0001026086],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.00007174624,0.0000180377,0.9843317,0.00005397793,0.00006899512,0.0002188359,0.0009420105,0.0003504773,0.004013233,0.0001027281,0.0008049552,0.009023203],"study_design_scores_gemma":[0.000002013592,0.000005789875,0.9978307,0.00001377303,0.000008914769,0.00004395777,0.0002733011,0.0001701816,0.0001847276,0.000008712471,0.001453671,0.000004132269],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.992152,0.0006179113,0.0001361529,0.00005907607,0.000007139536,0.00001688363,0.004028367,0.00001980247,0.002962609],"genre_scores_gemma":[0.9942877,0.0004891773,0.0004069239,0.00003840408,0.000005863748,0.00001160556,0.003039487,0.000008168149,0.001712683],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.02388501,"threshold_uncertainty_score":0.06129324,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.004808978855589591,"score_gpt":0.2102647597172388,"score_spread":0.2054557808616493,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}