Research Content https://aqrc.ucdavis.edu/ Research Content for Air Quality Research Center en Job Opening: Postdoctoral Scholar Position https://aqrc.ucdavis.edu/job-opening-postdoctoral-scholar-position <h2><strong>Postdoctoral scholar position: ASCENT - Atmospheric Science and mEasurement  NeTwork, FT-IR and ACSM</strong></h2> <h2 class="heading--underline"><strong>Location: University of California, Davis</strong></h2> <p class="MsoBodyText"><span><span><span>The Atmospheric Science and mEasurement NeTwork (ASCENT, <a href="https://research.gatech.edu/12-million-nsf-grant-will-establish-nationwide-atmospheric-measurement-network"><span>link</span></a>) is a new aerosol measurement network funded by the National Science Foundation Mid-Scale Research Infrastructure program.</span></span></span></p> December 10, 2021 - 8:48am Sandra Hall https://aqrc.ucdavis.edu/job-opening-postdoctoral-scholar-position Job Opening: Postdoctoral Researcher https://aqrc.ucdavis.edu/news/job-opening-postdoctoral-researcher <h2><span><span><strong><span><span>Postdoctoral Researcher, </span></span></strong></span></span><span><span><strong><span><span>New Instrument for Detecting Wine Grape Taint</span></span></strong></span></span></h2> <h2 class="heading--underline"><span><span><span><strong><span><span><span><span><span><span><span><span><span><span><span>Location: University of California, </span></span><span><span>Davis</span></span></span></span></span></span></span></span></span></span></span></strong></span></span></span></h2> <p><span><span><span><span>Wildfires have devastated large swaths of the west</span></span></span></span></p> August 18, 2021 - 7:30pm Sandra Hall https://aqrc.ucdavis.edu/news/job-opening-postdoctoral-researcher Wildfire Resilient Structures Conference https://aqrc.ucdavis.edu/events/WIRESconference <h2>Wildfire Resilient Structures (WiReS) Conference</h2> <h4>Date: Winter 2022/2023</h4> <h4>Location: TBD</h4> <h2 class="heading--underline">Purpose</h2> <p><span><span><span><span><span>The </span></span></span></span></span><span><span><span><strong><span>Wi</span></strong></span></span></span><span><span><span><span><span>ldfire </span></span></span></span></span><span><span><span><strong><span>Re</span></strong></span></span></span><span><span><span><span><span>sistant </span></span></span></span></span><span><span><span><strong><span>S</span></strong></span></span></span><span></span></p> May 19, 2021 - 11:26am Sandra Hall https://aqrc.ucdavis.edu/events/WIRESconference PM2.5 and Ozone only slightly reduced during the COVID lockdown in China https://aqrc.ucdavis.edu/news/pm25-and-ozone-only-slightly-reduced-during-covid-lockdown-china <p>A recent study by the University of Leeds and the Southern University of Science and Technology in Shenzhen divulged PM2.5 had only a small reduction across China and it was not lowered at all in Northeast China. The PM2.5 reduction of 11% across China was disappointing in comparison to the reduction 27% of NO2 across China.  </p> <p>Lead author Ben Silver, from the University of Leeds, said: “PM2.5 particles had only a modest reduction and are the most harmful constituent of air pollution, as they travel deep into the lungs and bloodstream and damage the lungs and heart.</p> July 29, 2020 - 8:17am Sandra Hall https://aqrc.ucdavis.edu/news/pm25-and-ozone-only-slightly-reduced-during-covid-lockdown-china 19 From UC Davis in Global List of Most-Cited Researchers https://aqrc.ucdavis.edu/news/19-uc-davis-global-list-most-cited-researchers <p>Nineteen researchers from the University of California, Davis, have been named in the annual Highly Cited Researchers 2018 list released by Clarivate Analytics. The list identifies exceptional scientists and social scientists who have demonstrated significant influence by publishing multiple papers that rank in the top 1 percent by citations in a particular field and year, over a 10-year period. </p> December 04, 2018 - 10:46am Leon S https://aqrc.ucdavis.edu/news/19-uc-davis-global-list-most-cited-researchers Multi-wavelength analysis of particle light absorption https://aqrc.ucdavis.edu/multi-wavelength-analysis-particle-light-absorption <h5>This project is no longer running.</h5> <p>AQRC scientists have designed and built a new broad-band light source instrument to adapt the Hybrid Integrating Plate/Sphere Analysis (HIPS) light absorption measurement for a full spectrum of wavelengths throughout the visible and including the near IR and UV. Work is underway to develop approaches for calibration and for analysis of the data from this new spectrometer.</p> January 24, 2018 - 1:56pm Sandra Hall https://aqrc.ucdavis.edu/multi-wavelength-analysis-particle-light-absorption Evaluation of organic carbon measurements in the IMPROVE and CSN networks https://aqrc.ucdavis.edu/evaluation-organic-carbon-measurements-improve-and-csn-networks The gain and loss of gaseous carbonaceous material from quartz filters can bias the measurement of organic particulate matter. The Air Quality Research Lab scientists have worked with others in the IMPROVE and Chemical Speciation Network (CSN) communities to investigate organic carbon measurement uncertainty related to determining a consistent method for estimating sampling artifacts and evaluating post-sampling losses during field latency and transport. January 24, 2018 - 1:54pm Sandra Hall https://aqrc.ucdavis.edu/evaluation-organic-carbon-measurements-improve-and-csn-networks FT-IR Analysis of Teflon (PTFE) Filter Samples https://aqrc.ucdavis.edu/ft-ir-om-oc-ec-and-functional-groups <p>FT-IR is a non-destructive which allows the filter samples to be analyzed by other non-destructive methods such as gravimetric for mass, XRF for elements, HIPS for light absorption, or destructive methods such as ion chromatography for ions or GC/MS for organic compounds after FT-IR analysis. FT-IR analysis and multivariate calibrations measure TOR-equivalent OC and EC, Functional groups such as aliphatic CH, carboxylic acids, carboxylates, non-acid carbonyl and alcohol OH (carbohydrates), Inorganic ions including sulfate, nitrate and ammonium, Soil elements and PM mass. </p> <p>For questions on ordering services contact <a href="https://aqrc.ucdavis.edu/people/ann-dillner">Ann Dillner</a>. </p> January 24, 2018 - 1:51pm Sandra Hall https://aqrc.ucdavis.edu/ft-ir-om-oc-ec-and-functional-groups Characterization of IMPROVE data quality https://aqrc.ucdavis.edu/characterization-improve-data-quality Each year the Air Quality Research Center delivers nearly one million new measurement values for the IMPROVE network. A large community of researchers and analysts use these data to address a wide range of scientific and regulatory issues. All data pass through multiple layers of review and quality assurance before publication, but all carry some uncertainty from the irreducible error that is present in any measurement. January 24, 2018 - 1:49pm Sandra Hall https://aqrc.ucdavis.edu/characterization-improve-data-quality CSN https://aqrc.ucdavis.edu/csn <h2 class="heading--underline">Chemical Speciation Network</h2> <h3>What It Is</h3> <p class="u-clear"><strong>CSN </strong>(Chemical Speciation Network) is a long-term national monitoring program for the EPA (Environmental Protection Agency). Created in 2000 as a response to support implementation of the 1997 PM2.5 National Ambient Air Quality Standards (NAAQS) as well as the 1999 Regional Haze Rule (regulations for states to establish goals in improving visibility), CSN is a PM2.5 sampling network with sites located principally in densely populated areas.</p> November 06, 2017 - 9:13am Sandra Hall https://aqrc.ucdavis.edu/csn