{"id":"https://openalex.org/W2597911532","doi":"https://doi.org/10.1088/1748-9326/aa69c8","title":"Evidence of 1991\u20132013 decrease of biogenic secondary organic aerosol in response to SO 2 emission controls","display_name":"Evidence of 1991\u20132013 decrease of biogenic secondary organic aerosol in response to SO 2 emission controls","publication_year":2017,"publication_date":"2017-03-29","ids":{"openalex":"https://openalex.org/W2597911532","doi":"https://doi.org/10.1088/1748-9326/aa69c8","mag":"2597911532"},"language":"en","primary_location":{"id":"doi:10.1088/1748-9326/aa69c8","doi":"https://doi.org/10.1088/1748-9326/aa69c8","is_oa":true,"landing_page_url":"https://doi.org/10.1088/1748-9326/aa69c8","pdf_url":"https://iopscience.iop.org/article/10.1088/1748-9326/aa69c8/pdf","source":{"id":"https://openalex.org/S139338987","display_name":"Environmental Research Letters","issn_l":"1748-9326","issn":["1748-9326"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","cwts-core","doaj","dongbi-b","jufo-3","ki-jl-1","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Environmental Research Letters","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://iopscience.iop.org/article/10.1088/1748-9326/aa69c8/pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5037559860","display_name":"Eloise Ann Marais","orcid":"https://orcid.org/0000-0001-5477-8051","observed_orcids":["https://orcid.org/0000-0001-5477-8051"]},"institutions":[{"id":"https://openalex.org/I136199984","display_name":"Harvard University","ror":"https://ror.org/03vek6s52","country_code":"US","type":"education","lineage":["https://openalex.org/I136199984"]},{"id":"https://openalex.org/I79619799","display_name":"University of Birmingham","ror":"https://ror.org/03angcq70","country_code":"GB","type":"education","lineage":["https://openalex.org/I79619799"]}],"countries":["GB","US"],"is_corresponding":true,"raw_author_name":"Eloise A Marais","raw_affiliation_strings":["Author to whom any correspondence should be addressed","Present address: School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, UK","School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States of America"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Author to whom any correspondence should be addressed","institution_ids":[]},{"raw_affiliation_string":"Present address: School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, UK","institution_ids":["https://openalex.org/I79619799"]},{"raw_affiliation_string":"School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States of America","institution_ids":["https://openalex.org/I136199984"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5011740304","display_name":"Daniel J. Jacob","orcid":"https://orcid.org/0000-0002-6373-3100","observed_orcids":["https://orcid.org/0000-0002-6373-3100"]},"institutions":[{"id":"https://openalex.org/I136199984","display_name":"Harvard University","ror":"https://ror.org/03vek6s52","country_code":"US","type":"education","lineage":["https://openalex.org/I136199984"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Daniel J Jacob","raw_affiliation_strings":["Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States of America","School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States of America"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States of America","institution_ids":["https://openalex.org/I136199984"]},{"raw_affiliation_string":"School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States of America","institution_ids":["https://openalex.org/I136199984"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5031217515","display_name":"Jay R. Turner","orcid":"https://orcid.org/0000-0001-7787-6244","observed_orcids":["https://orcid.org/0000-0001-7787-6244"]},"institutions":[{"id":"https://openalex.org/I204465549","display_name":"Washington University in St. Louis","ror":"https://ror.org/01yc7t268","country_code":"US","type":"education","lineage":["https://openalex.org/I204465549"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Jay R Turner","raw_affiliation_strings":["Department of Energy, Environmental and Chemical Engineering, Washington University, St Louis, MO, United States of America"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Energy, Environmental and Chemical Engineering, Washington University, St Louis, MO, United States of America","institution_ids":["https://openalex.org/I204465549"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5055085627","display_name":"Loretta J. Mickley","orcid":"https://orcid.org/0000-0002-7859-3470","observed_orcids":["https://orcid.org/0000-0002-7859-3470"]},"institutions":[{"id":"https://openalex.org/I136199984","display_name":"Harvard University","ror":"https://ror.org/03vek6s52","country_code":"US","type":"education","lineage":["https://openalex.org/I136199984"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Loretta J Mickley","raw_affiliation_strings":["School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States of America"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States of America","institution_ids":["https://openalex.org/I136199984"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5037559860"],"corresponding_institution_ids":["https://openalex.org/I136199984","https://openalex.org/I79619799"],"apc_list":{"value":3045,"currency":"USD","value_usd":3045},"apc_paid":{"value":3045,"currency":"USD","value_usd":3045},"fwci":3.5192,"has_fulltext":true,"cited_by_count":51,"citation_normalized_percentile":{"value":0.92812448,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":90,"max":99},"biblio":{"volume":"12","issue":"5","first_page":"054018","last_page":"054018"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10075","display_name":"Atmospheric chemistry and aerosols","score":0.9990000128746033,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10075","display_name":"Atmospheric chemistry and aerosols","score":0.9990000128746033,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10347","display_name":"Atmospheric aerosols and clouds","score":0.00039999998989515007,"subfield":{"id":"https://openalex.org/subfields/2306","display_name":"Global and Planetary Change"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11320","display_name":"Atmospheric Ozone and Climate","score":0.0,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/biogenic-secondary-organic-aerosol","display_name":"biogenic secondary organic aerosol","score":0.9829999804496765},{"id":"https://openalex.org/keywords/sulfur-dioxide-emission-control","display_name":"sulfur dioxide emission control","score":0.8679999709129333},{"id":"https://openalex.org/keywords/sulfate-aerosols","display_name":"sulfate aerosols","score":0.7409999966621399},{"id":"https://openalex.org/keywords/pm2-5","display_name":"PM2.5","score":0.7749999761581421},{"id":"https://openalex.org/keywords/isoprene","display_name":"isoprene","score":0.8510000109672546},{"id":"https://openalex.org/keywords/air-quality-co-benefits","display_name":"air quality co-benefits","score":0.7609999775886536},{"id":"https://openalex.org/keywords/volatile-organic-compounds","display_name":"volatile organic compounds","score":0.7829999923706055},{"id":"https://openalex.org/keywords/nitrogen-oxides","display_name":"nitrogen oxides","score":0.7770000100135803},{"id":"https://openalex.org/keywords/southeastern-united-states","display_name":"southeastern United States","score":0.6359999775886536},{"id":"https://openalex.org/keywords/geos-chem-simulation","display_name":"GEOS-Chem simulation","score":0.6970000267028809},{"id":"https://openalex.org/keywords/long-term-aerosol-trends","display_name":"long-term aerosol trends","score":0.6949999928474426}],"concepts":[{"id":"https://openalex.org/C2780959689","wikidata":"https://www.wikidata.org/wiki/Q271943","display_name":"Isoprene","level":4,"score":0.9118514060974121},{"id":"https://openalex.org/C2778343803","wikidata":"https://www.wikidata.org/wiki/Q172290","display_name":"Sulfate","level":2,"score":0.8882578611373901},{"id":"https://openalex.org/C2779345167","wikidata":"https://www.wikidata.org/wiki/Q104541","display_name":"Aerosol","level":2,"score":0.8349183201789856},{"id":"https://openalex.org/C126314574","wikidata":"https://www.wikidata.org/wiki/Q2364111","display_name":"Air quality index","level":2,"score":0.6804123520851135},{"id":"https://openalex.org/C24245907","wikidata":"https://www.wikidata.org/wiki/Q498957","display_name":"Particulates","level":2,"score":0.6734679341316223},{"id":"https://openalex.org/C107872376","wikidata":"https://www.wikidata.org/wiki/Q321355","display_name":"Environmental chemistry","level":1,"score":0.6101590394973755},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.60942542552948},{"id":"https://openalex.org/C2780447027","wikidata":"https://www.wikidata.org/wiki/Q5282","display_name":"Sulfur dioxide","level":2,"score":0.592181384563446},{"id":"https://openalex.org/C2779681926","wikidata":"https://www.wikidata.org/wiki/Q4117936","display_name":"Sulfate aerosol","level":3,"score":0.5761591196060181},{"id":"https://openalex.org/C2777517185","wikidata":"https://www.wikidata.org/wiki/Q5090505","display_name":"Chemical transport model","level":3,"score":0.5498625040054321},{"id":"https://openalex.org/C518881349","wikidata":"https://www.wikidata.org/wiki/Q682","display_name":"Sulfur","level":2,"score":0.5113798975944519},{"id":"https://openalex.org/C203032635","wikidata":"https://www.wikidata.org/wiki/Q20962970","display_name":"NOx","level":3,"score":0.5023801326751709},{"id":"https://openalex.org/C2776720842","wikidata":"https://www.wikidata.org/wiki/Q1337883","display_name":"Emission inventory","level":3,"score":0.4459918141365051},{"id":"https://openalex.org/C91586092","wikidata":"https://www.wikidata.org/wiki/Q757520","display_name":"Atmospheric sciences","level":1,"score":0.44121211767196655},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.36651313304901123},{"id":"https://openalex.org/C153294291","wikidata":"https://www.wikidata.org/wiki/Q25261","display_name":"Meteorology","level":1,"score":0.18687373399734497},{"id":"https://openalex.org/C179104552","wikidata":"https://www.wikidata.org/wiki/Q11165","display_name":"Inorganic chemistry","level":1,"score":0.08519941568374634},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.07529816031455994},{"id":"https://openalex.org/C105923489","wikidata":"https://www.wikidata.org/wiki/Q133235","display_name":"Combustion","level":2,"score":0.0744391679763794},{"id":"https://openalex.org/C15920480","wikidata":"https://www.wikidata.org/wiki/Q421281","display_name":"Copolymer","level":3,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0},{"id":"https://openalex.org/C521977710","wikidata":"https://www.wikidata.org/wiki/Q81163","display_name":"Polymer","level":2,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1088/1748-9326/aa69c8","doi":"https://doi.org/10.1088/1748-9326/aa69c8","is_oa":true,"landing_page_url":"https://doi.org/10.1088/1748-9326/aa69c8","pdf_url":"https://iopscience.iop.org/article/10.1088/1748-9326/aa69c8/pdf","source":{"id":"https://openalex.org/S139338987","display_name":"Environmental Research Letters","issn_l":"1748-9326","issn":["1748-9326"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","cwts-core","doaj","dongbi-b","jufo-3","ki-jl-1","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Environmental Research Letters","raw_type":"journal-article"},{"id":"pmh:oai:doaj.org/article:03ed84fd655d42f190b44b7b3d5c1d6a","doi":null,"is_oa":false,"landing_page_url":"https://doaj.org/article/03ed84fd655d42f190b44b7b3d5c1d6a","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Environmental Research Letters, Vol 12, Iss 5, p 054018 (2017)","raw_type":"article"},{"id":"pmh:oai:pure.atira.dk:openaire_cris_publications/edfc2aa3-ed57-4b1b-81d8-4cd4b5bf3267","doi":null,"is_oa":true,"landing_page_url":"https://research.birmingham.ac.uk/en/publications/edfc2aa3-ed57-4b1b-81d8-4cd4b5bf3267","pdf_url":null,"source":{"id":"https://openalex.org/S4306402634","display_name":"University of Birmingham Research Portal (University of Birmingham)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I79619799","host_organization_name":"University of Birmingham","host_organization_lineage":["https://openalex.org/I79619799"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Marais, E A, Jacob, D, Turner, J & Mickley, L 2017, 'Evidence of 1991-2013 decrease of biogenic secondary organic aerosol in response to SO 2 emission controls', Environmental Research Letters, vol. 12, no. 5, 054018. https://doi.org/10.1088/1748-9326/aa69c8","raw_type":"article"}],"best_oa_location":{"id":"doi:10.1088/1748-9326/aa69c8","doi":"https://doi.org/10.1088/1748-9326/aa69c8","is_oa":true,"landing_page_url":"https://doi.org/10.1088/1748-9326/aa69c8","pdf_url":"https://iopscience.iop.org/article/10.1088/1748-9326/aa69c8/pdf","source":{"id":"https://openalex.org/S139338987","display_name":"Environmental Research Letters","issn_l":"1748-9326","issn":["1748-9326"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","cwts-core","doaj","dongbi-b","jufo-3","ki-jl-1","norway-2","oarl","poland-140","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Environmental Research Letters","raw_type":"journal-article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/13","score":0.75,"display_name":"Climate action"}],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320306101","display_name":"National Aeronautics and Space Administration","ror":"https://ror.org/027ka1x80"},{"id":"https://openalex.org/F4320320671","display_name":"National Research Foundation","ror":"https://ror.org/05s0g1g46"},{"id":"https://openalex.org/F4320333674","display_name":"Earth Sciences Division","ror":"https://ror.org/045s99b94"}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2597911532.pdf","grobid_xml":"https://content.openalex.org/works/W2597911532.grobid-xml"},"referenced_works_count":56,"referenced_works":["https://openalex.org/W102279446","https://openalex.org/W1259800230","https://openalex.org/W1522177459","https://openalex.org/W1894008648","https://openalex.org/W1958177581","https://openalex.org/W1965571022","https://openalex.org/W1966779205","https://openalex.org/W1969817342","https://openalex.org/W1987244498","https://openalex.org/W1991199950","https://openalex.org/W1999005927","https://openalex.org/W2018148628","https://openalex.org/W2024178313","https://openalex.org/W2024458587","https://openalex.org/W2028891878","https://openalex.org/W2029670846","https://openalex.org/W2034010290","https://openalex.org/W2034838692","https://openalex.org/W2040153930","https://openalex.org/W2041931582","https://openalex.org/W2044815983","https://openalex.org/W2046884997","https://openalex.org/W2048697203","https://openalex.org/W2053971826","https://openalex.org/W2057898361","https://openalex.org/W2059395660","https://openalex.org/W2063165760","https://openalex.org/W2063725653","https://openalex.org/W2079293731","https://openalex.org/W2079702179","https://openalex.org/W2095777412","https://openalex.org/W2097806302","https://openalex.org/W2105791725","https://openalex.org/W2106612002","https://openalex.org/W2111369201","https://openalex.org/W2115049406","https://openalex.org/W2116507044","https://openalex.org/W2123612327","https://openalex.org/W2126235689","https://openalex.org/W2127903053","https://openalex.org/W2131143916","https://openalex.org/W2131769387","https://openalex.org/W2134662674","https://openalex.org/W2134927874","https://openalex.org/W2150956567","https://openalex.org/W2156122616","https://openalex.org/W2164697469","https://openalex.org/W2172083507","https://openalex.org/W2264203691","https://openalex.org/W2278216748","https://openalex.org/W2304967739","https://openalex.org/W2330546898","https://openalex.org/W2460939749","https://openalex.org/W2516720299","https://openalex.org/W2606183968","https://openalex.org/W2955601895"],"related_works":["https://openalex.org/W4214629151","https://openalex.org/W4385761218","https://openalex.org/W2883403128","https://openalex.org/W4388569527","https://openalex.org/W2512936980","https://openalex.org/W3036816808","https://openalex.org/W2069485424","https://openalex.org/W2756162510","https://openalex.org/W2079702179","https://openalex.org/W4294879409"],"abstract_inverted_index":{"Air":[0],"quality":[1,199],"policy":[2],"to":[3,81,156],"decrease":[4,155],"fine":[5],"particulate":[6],"matter":[7],"mass":[8],"concentrations":[9],"(PM":[10],"2.5":[11,44],")":[12,28,64],"in":[13,50,54,59,89,93,111,158,178,206],"the":[14,38,51,90,103,143,153,159,179],"US":[15,53,92],"has":[16],"mainly":[17],"targeted":[18],"sulfate":[19,35,60,148,166],"aerosol":[20,31,171],"through":[21],"controls":[22,205],"on":[23],"sulfur":[24],"dioxide":[25],"(SO":[26],"2":[27,114,203],"emissions.":[29],"Organic":[30],"(OA)":[32],"instead":[33],"of":[34,41,72,134,147,201],"is":[36,76,79,95,185],"now":[37],"dominant":[39],"component":[40],"total":[42],"PM":[43],".":[45],"Long-term":[46],"surface":[47],"observations":[48],"(1991\u20132013)":[49],"Southeast":[52,91],"summer":[55,94],"show":[56],"parallel":[57],"decreases":[58,110,146,167],"(2.8%\u20134.0%":[61],"a":[62,68,99,131,196],"\u22121":[63,69],"and":[65,119,130,149,151,173],"OA":[66,74,88,128,154,160,176,209],"(1.6%\u20131.9%":[67],").":[70],"Decline":[71],"anthropogenic":[73,112,126],"emissions":[75],"uncertain":[77],"but":[78],"unlikely":[80],"fully":[82],"explain":[83],"this":[84],"trend":[85],"because":[86],"most":[87],"biogenic.":[96],"We":[97],"conducted":[98],"1991\u20132013":[100],"simulation":[101,141],"with":[102,189],"GEOS-Chem":[104],"chemical":[105],"transport":[106],"model":[107,180],"including":[108],"inventory":[109],"SO":[113,202],",":[115,118],"NO":[116],"x":[117],"volatile":[120],"organic":[121],"compounds":[122],"(VOCs)":[123],"emissions,":[124,129],"constant":[125],"primary":[127],"new":[132],"mechanism":[133],"aqueous-phase":[135],"SOA":[136],"formation":[137],"from":[138,162],"isoprene.":[139],"This":[140,191],"reproduces":[142],"observed":[144],"long-term":[145],"OA,":[150],"attributes":[152],"decline":[157],"yield":[161],"biogenic":[163,208],"isoprene":[164],"as":[165,210,212],"(driving":[168],"lower":[169],"aqueous":[170],"volume":[172],"acidity).":[174],"Interannual":[175],"variability":[177],"(mainly":[181],"driven":[182],"by":[183],"isoprene)":[184],"also":[186],"well":[187,211],"correlated":[188],"observations.":[190],"result":[192],"provides":[193],"support":[194],"for":[195],"large":[197],"air":[198],"co-benefit":[200],"emission":[204],"decreasing":[207],"sulfate.":[213]},"counts_by_year":[{"year":2026,"cited_by_count":3},{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":4},{"year":2023,"cited_by_count":9},{"year":2021,"cited_by_count":11},{"year":2020,"cited_by_count":7},{"year":2019,"cited_by_count":7},{"year":2018,"cited_by_count":5},{"year":2017,"cited_by_count":4}],"updated_date":"2026-11-04T10:54:05.112534","created_date":"2017-04-07T00:00:00"}