{"doi":"10.1139/cjfr-27-4-609","title":"&lt;sup&gt;13&lt;/sup&gt;C in tree rings along an air pollution gradient in the Karelian Isthmus, northwest Russia and southeast Finland","abstract":null,"journal":"Canadian Journal of Forest Research","year":1997,"id":625643,"datarank":0.40620753016533157,"base_score":2.70805020110221,"endowment":2.70805020110221,"self_citation_contribution":0.40620753016533157,"citation_network_contribution":0.0,"self_endowment_contribution":0.40620753016533157,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":14,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1618160,"name":"I. Lumme","orcid":null,"position":1,"is_corresponding":false},{"id":1618162,"name":"W. Mattson","orcid":null,"position":2,"is_corresponding":false},{"id":1618164,"name":"V. Arkhipov","orcid":null,"position":3,"is_corresponding":false},{"id":1590077,"name":"P. Niemelä","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"resolved":true,"title":"&lt;sup&gt;13&lt;/sup&gt;C in tree rings along an air pollution gradient in the Karelian Isthmus, northwest Russia and southeast Finland","abstract":"Nous avons mesure les valeurs de δ 13 C pour les annees 1954-1992 dans les cernes annuels de pins sylvestres (Pinus sylvestris L.) dans neuf parcelles d'un reseau de detection de la pollution de l'air dans le nord-ouest de la Russie et le sud-est de la Finlande. Les arbres dans les parcelles situees a proximite des sources de pollution avaient tendance a avoir des valeurs de δ 13 C moins negatives (> 13 C dans leur bois) que les arbres dans les parcelles situees plus loin au nord. De plus, a peu pres entre 1960 et 1992, la valeur de δ 13 C avait tendance a devenir plus negative (c. a d. < 13 C) dans cinq des parcelles. Dans quatre parcelles, les valeurs de δ 13 C variaient autour de leur moyenne sans qu'il y ait de tendance temporelle. Les resultats suggerent que les forets situees a proximite des sources de pollution furent plus severement affectees pendant les trois premieres decennies qu'au cours de la derniere pendant la periode d'echantillonnage, probablement a cause des emissions chroniques et tres importantes de S et N en provenance de la region de St-Petersburg et du nord-est de l'Estonie, et probablement aussi de l'Europe Centrale.","is_dataset_classified":null,"base_score":2.70805020110221,"endowment":2.70805020110221,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"19910364","pmcid":null,"openalex_id":"https://openalex.org/W2155345417","authors":[],"funders":[],"total_grants":0,"fwci":0.3598,"citation_percentile":0.64157791,"influential_citations":0,"citation_trend":[{"year":2012,"count":1},{"year":2013,"count":1},{"year":2016,"count":1},{"year":2019,"count":1}],"oa_status":"closed","license":null,"oa_locations":[{"url":"https://doi.org/10.1139/cjfr-27-4-609","host_type":"journal"}],"fields_of_study":["Plant Water Relations and Carbon Dynamics","Plant responses to elevated CO2","Tree-ring climate responses"],"mesh_terms":[],"keywords":["Forestry","Geography","Pollution","Biology","Ecology"],"sdg_mappings":[],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-08-04T07:22:20.272866Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}