{"id":"W1979192930","doi":"10.1038/415156a","title":"Reduced nitrogen fixation in the glacial ocean inferred from changes in marine nitrogen and phosphorus inventories","year":2002,"lang":"en","type":"article","venue":"Nature","topic":"Marine and coastal ecosystems","field":"Earth and Planetary Sciences","cited_by":152,"is_retracted":false,"has_abstract":false,"ca_institutions":"University of British Columbia","funders":"Natural Sciences and Engineering Research Council of Canada; Natural Environment Research Council; Research Councils UK; National Science Foundation","keywords":"Redfield ratio; Phytoplankton; Nitrogen; Phosphorus; Upwelling; Oceanography; Nitrogen fixation; Environmental science; Nutrient; Productivity; Trichodesmium; Denitrification; Glacial period; Environmental chemistry; Oxygen minimum zone; Ecology; Chemistry; Geology; Biology; Diazotroph","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"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":[0.0004406758,0.00025675,0.0002252563,0.0007834608,0.0002403709,0.0006430586,0.0002378055,0.000410389,0.0006527437],"category_scores_gemma":[0.001189321,0.0002745785,0.0003474429,0.0008420335,0.0005346009,0.0004100714,0.0003699302,0.0003108926,0.0001039338],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0009529455,"about_ca_system_score_gemma":0.0003852419,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.02969795,"about_ca_topic_score_gemma":0.03918572,"domain_scores_codex":[0.999897,0.00002127206,0.00001096198,0.0000362639,0.0000123828,0.00002209269],"domain_scores_gemma":[0.9995915,0.0001138546,0.000135633,0.00004720438,0.00006038846,0.00005143973],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0004101482,0.00002637368,0.9770533,0.00004158372,0.0003698122,0.0001250783,0.0001494543,0.005080589,0.01253533,0.0003433322,0.0001886763,0.003676422],"study_design_scores_gemma":[0.00001070003,0.00001160427,0.997651,0.000003672742,0.00004800972,0.00002506213,0.00003796447,0.001541373,0.0003491972,0.000179869,0.000136563,0.000005011127],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9993298,0.00009170669,0.00004265734,0.00003570873,0.000002813183,5.541907e-7,0.0002197948,0.000004277709,0.000272745],"genre_scores_gemma":[0.999608,0.00004613972,0.00004199211,0.00001517609,0.000003229002,6.658537e-7,0.0002401782,0.000001408376,0.00004323745],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.02969795,"threshold_uncertainty_score":0.0590502,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.01058128749184338,"score_gpt":0.197664840018479,"score_spread":0.1870835525266356,"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."}}