{"id":"W1492315926","doi":"10.1029/2006gb002889","title":"Potential glacial‐interglacial changes in stable carbon isotope ratios of methane sources and sink fractionation","year":2008,"lang":"en","type":"article","venue":"Global Biogeochemical Cycles","topic":"Geology and Paleoclimatology Research","field":"Earth and Planetary Sciences","cited_by":29,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Victoria","funders":"","keywords":"Last Glacial Maximum; Sink (geography); Atmospheric methane; Fractionation; Ice core; Isotopes of carbon; Environmental science; Isotope fractionation; Holocene; Methane; Interglacial; Stable isotope ratio; Environmental chemistry; Glacial period; Carbon cycle; Wetland; Radiocarbon dating; Atmospheric sciences; Greenhouse gas; Chemistry; Geology; Climatology; Oceanography; Ecology; Total organic carbon; Paleontology; Ecosystem","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0001759716,0.000107236,0.0002126558,0.00007996109,0.00006512806,0.000007548086,0.0001149414,0.0001944973,0.0003241253],"category_scores_gemma":[0.000112301,0.00009685196,0.00003055562,0.0002207757,0.0003947125,0.00007799837,0.00002556108,0.0001363833,0.0000148539],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.000003078221,"about_ca_system_score_gemma":0.00004437977,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.002321725,"about_ca_topic_score_gemma":0.01496287,"domain_scores_codex":[0.999005,0.000112527,0.0001840663,0.0002313877,0.0001937604,0.0002732547],"domain_scores_gemma":[0.9996341,0.00009716226,0.0000650047,0.00007966804,0.00004756633,0.00007643656],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0001966865,0.00002544708,0.996804,0.00001419636,0.00001314412,0.00002432538,0.0000744878,0.00002902635,0.002035171,0.00003110279,0.00002684569,0.0007255404],"study_design_scores_gemma":[0.0004520715,0.00008873614,0.9746441,0.0000103076,0.00001050968,0.0001312263,0.0001163283,0.0006902355,0.02129897,0.002271958,0.0001637575,0.0001217544],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9956048,0.001039169,0.00000426464,0.0007292802,0.0001045341,0.0001142076,0.00009267833,0.0000167696,0.002294313],"genre_scores_gemma":[0.9992875,0.0002331466,0.0001625708,0.0000565,0.00006373581,0.000001754322,0.0001814784,0.00000112639,0.00001212352],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.02215989,"threshold_uncertainty_score":0.8349631,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.01419224201511863,"score_gpt":0.2404798107172749,"score_spread":0.2262875687021563,"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."}}