{"592803":{"#nid":"592803","#data":{"type":"event","title":"PhD Defense by Lucas R.F. Henneman","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EPh.D. Thesis Defense Announcement\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAir Pollution Accountability: Assessing Regulatory Impacts on Emissions and Air Quality\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Eby:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003ELucas R.F. Henneman\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAdvisor:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Armistead G. Russell\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. James A. Mulholland (CEE), Dr. Patricia L. Mokhtarian\u003C\/p\u003E\r\n\r\n\u003Cp\u003E(CEE), Dr. Athanasios Nenes (EAS), Dr. Paige E. Tolbert (Emory)\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDate \u0026amp; Time: \u003C\/strong\u003E6 July, 2017 at 11:00 a.m.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ELocation: \u003C\/strong\u003EFord Environmental Science \u0026amp; Technology L1-116\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EABSTRACT\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe United States has seen large improvements in air quality over the last half century with the implementation\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eof regulations designed to reduce air pollutant emissions. Regulatory costs, estimated by the Environmental\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProtection Agency at tens of billions of dollars per year, motivate air pollution accountability research, which\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eevaluates impacts of air quality regulations on emissions, air quality, exposure\/dose, and public health\u0026mdash;\u003C\/p\u003E\r\n\r\n\u003Cp\u003Ecomponents of the so-called \u003Cem\u003EAccountability Chain\u003C\/em\u003E. This work adds to the expanding air pollution accountability\u003C\/p\u003E\r\n\r\n\u003Cp\u003Efield by investigating a range of regulatory actions on electricity generating units and on-road mobile sources\u003C\/p\u003E\r\n\r\n\u003Cp\u003Epromulgated since the 1990s. Results show that the United States has seen major emissions reductions over this\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eperiod, and most of the decreases are attributable to regulatory policies, although influences such as fuel costs,\u003C\/p\u003E\r\n\r\n\u003Cp\u003Edemographic shifts, and technological improvements have influenced emissions reductions as well.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe bulk of this work investigates the impacts of changing emissions on air quality in the Eastern United States.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EAnalyses focus on ambient ozone and particulate matter with diameter less than 2.5 \u0026mu;m (PM2.5), two pollutants\u003C\/p\u003E\r\n\r\n\u003Cp\u003Elinked with adverse health and environmental impacts. Observation-based statistical models and a deterministic\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eair quality model (the Community Multiscale Air Quality model\u0026mdash;CMAQ) show that emissions reduction\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eprograms reduced the highest ozone concentrations while simultaneously increasing the lowest concentrations.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFor PM2.5, controls reduced both the annual mean values and the variability. Meteorology had large impacts on\u003C\/p\u003E\r\n\r\n\u003Cp\u003Edaily pollutant concentrations, but long-term trends were driven by emissions reductions. An evaluation shows\u003C\/p\u003E\r\n\r\n\u003Cp\u003Ethat CMAQ captured ozone and PM2.5 concentrations and changes over the decade, but the model did not always\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eget the right answer for the right reasons. For example, the model had trouble estimating absolute concentrations\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eand variability of certain species that make up PM2.5, but the biases canceled out when the species were summed.\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThis research provides important evidence that links regulations to emissions reductions and air quality\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eimprovements while accounting for numerous concurrent changes. Lessons learned in accountability research can\u003C\/p\u003E\r\n\r\n\u003Cp\u003Ebe applied to future air quality management strategies, and this work provides two examples: one using empirical\u003C\/p\u003E\r\n\r\n\u003Cp\u003Eand CMAQ modeling of ozone in the United States, and another using an integrated assessment of energy, air\u003C\/p\u003E\r\n\r\n\u003Cp\u003Epollution, and climate policies in South Africa.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Air Pollution Accountability: Assessing Regulatory Impacts on Emissions and Air Quality"}],"uid":"27707","created_gmt":"2017-06-19 19:57:25","changed_gmt":"2017-06-19 19:57:25","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2017-07-06T12:00:00-04:00","event_time_end":"2017-07-06T14:00:00-04:00","event_time_end_last":"2017-07-06T14:00:00-04:00","gmt_time_start":"2017-07-06 16:00:00","gmt_time_end":"2017-07-06 18:00:00","gmt_time_end_last":"2017-07-06 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}