Science Inventory

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Johnson, K., A. Clements, AND A. Holder. 2021 AirNow Sensor Data Pilot: Updates from ORD. U.S. EPA: AirNow Fire & Smoke Map Status Webinar, NA, Virtual, April 28, 2021.

Clements, A., R. Brown, D. Garver, M. Miller, K. Johnson, AND A. Kaufman. Collocated Air Sensor Shelters for Tribes and Citizen Science: Project Introduction. Discussion with Tribal Air Monitoring Support Center (TAMS), RTP, North Carolina, March 23 - 31, 2021.

Davison, G., K. Johnson, G. Hagler, A. Holder, S. Coefield, C. Noonan, AND B. Hassett-Sipple. Creating Clean Air Spaces During Wildland Fire Smoke Episodes: Web Summit Summary. Frontiers in Public Health. Frontiers, Lausanne, Switzerland, 9:508971, (2021). https://doi.org/10.3389/fpubh.2021.508971

Duvall, R., G. Hagler, A. Clements, K. Benedict, K. Johnson, Vasu Kilaru, T. Hanley, N. Watkins, A. Kaufman, A. Kamal, S. Reece, P. Fransioli, M. Gerboles, G. Gillerman, R. Habre, M. Hannigan, Z. Ning, V. Papapostolou, R. Pope, P. Quintana, AND J. Lam Snyder. Deliberating Performance Targets: Follow-on Workshop Discussing PM10, NO2, CO, and SO2 Air Sensor Targets. Atmospheric Environment: X. Elsevier B.V., Amsterdam, Netherlands, 246:NA, (2021). https://doi.org/10.1016/j.atmosenv.2020.118099

Johnson Barkjohn, K., A. Holder, A. Clements, S. Frederick, AND R. Evans. Sensor data cleaning and correction: Application on the AirNow Fire and Smoke Map. To be Presented at American Association for Aerosol Research Conference, Albuquerque, NM, October 18 - 22, 2021.

Johnson, K., A. Holder, AND A. Clements. Technical Overview of the Development and ​Performance Validation ​of U.S.-Wide Correction Equation ​for PurpleAir Sensor Data. Communicating Air Quality During Fires: The Science Behind the AirNow Sensor Data Pilot (Webinar), Research Triangle Park, NC, January 28, 2021.

Johnson, K., A. Holder, A. Clements, S. Larkin, S. Illson, AND R. Evans. The EPA US Forest Service (USFS) AirNow Fire and Smoke Map Sensor Data Pilot. To be Presented at A-E BOSC SC Meet the Scientist, Research Triangle Park, NC, February 17 - 18, 2021.

Clements, A., K. Johnson, AND A. Holder. Air Sensors for Wildfire Smoke: PurpleAir, AirNow Fire and Smoke Map, and Beyond. 2020 Tribal Science Council (TSC) Virtual Science Meeting, NA, NC, December 01 - 03, 2020.

Johnson, K., S. Frederick, A. Holder, AND A. Clements. Air Sensors: PurpleAir, AirNow Fire and Smoke Map, and their use Internationally. U.S. State Department Embassy Fellows Program Monthly Virtual Meeting, Durham, NC, December 03, 2020.

Johnson, K., A. Holder, AND A. Clements. Development and Performance Validation of U.S. Wide Correction Equation for PurpleAir Sensor Data. AirNow Sensor Data Pilot Webinar, Research Triangle Park, NC, September 16, 2020.

Frederick, S., K. Johnson, A. Holder, AND A. Clements. Impacts of Data Completeness on Hourly Averaged PurpleAir PM2.5 Concentrations During Smoke Events. American Association of Aerosol Research (AAAR) Annual Conference, Research Triangle Park, NC, October 06 - 09, 2020.

Johnson, K., S. Frederick, C. Johnson, R. Yaga, B. Thomas, W. Schoppman, AND A. Clements. Long-Term Performance of Five Air Sensor Models Across Seven U.S. Sites. Air Sensors International Conference - Fall Virtual Series, NA, NC, October 01, 2020.

Frederick, S., K. Johnson, C. Johnson, R. Yaga, I. VonWald, AND A. Clements. Performance Evaluations of Multiple Commercial PM Sensors in Research Triangle Park, NC. To be Presented at Annual Conference of the American Association for Aerosol Research, Raleigh, NC, October 05 - 09, 2020.

Frederick, S., K. Johnson, C. Johnson, R. Yaga, AND A. Clements. Performance Evaluations of PM2.5 sensors in Research Triangle Park, NC: PurpleAir PA-II-SD, Aeroqual AQY, Applied Particle Technology Maxima, Vaisala AQT420, Sens-it RAMP, and Clarity Node-S. To be Presented at EPA Air Sensors Brownbag, Research Triangle Park, NC, February 12, 2020.

Frederick, S., K. Johnson, C. Johnson, R. Yaga, AND A. Clements. Performance Evaluations of Six PM2.5 Sensors in Research Triangle Park, NC. Air Sensors International Conference, Pasadena, CA, May 12 - 15, 2020.

Johnson, K., A. Holder, S. Frederick, G. Hagler, AND A. Clements. PurpleAir PM2.5 U.S. Correction and Performance During Smoke Events. Air Pollution Monitoring for Communities Final Grantee Meeting, Research Triangle Park, NC, February 25, 2020.

Johnson, K., A. Holder, S. Frederick, AND A. Clements. PurpleAir PM2.5 U.S. Correction and Performance During Smoke Events 4/2020. International Smoke Symposium, Raleigh, NC, April 20 - 24, 2020.

Johnson, K., A. Holder, S. Frederick, G. Hagler, AND A. Clements. PurpleAir PM2.5 performance across the U.S.#2. Meeting between ORD, OAR/AirNow, and USFS, Research Triangle Park, NC, February 03, 2020.

Johnson, K., C. Johnson, S. Frederick, R. Yaga, B. Thomas, W. Schoppman, AND A. Clements. Year long performance of Six PM Air Sensor Models Across Seven U.S. Sites. Annual Conference of the American Association for Aerosol Research, Raleigh, NC, October 05 - 09, 2020.

Johnson, K., B. Gantt, D. Garver, R. Brown, I. Vonwald, AND A. Clements. Evaluation of Purple Air Sensors Across the United States. 2019 American Association of Aerosol Research Annual Conference, Research Triangle Park, NC, October 14 - 18, 2019.

Vonwald, I., K. Johnson, E. Kimbrough, B. Davis, H. Patel, I. Domsky, R. Pope, AND A. Clements. From Data Retrieval to Performance Evaluation: PurpleAir Sensor Collocation Across Phoenix, AZ. 2019 AAAR Annual Conference, Portland, OR, October 14 - 18, 2019.

Johnson, K., B. Gantt, I. VonWald, AND A. Clements. PurpleAir PM2.5 Performance Across the U.S. Webinar Presentation with State/Local/Tribal Project Partners, RTP, NC, December 09, 2019.

Johnson, K., J. Rice, R. Vanderpool, Timothy Hanley, AND A. Clements. Variability between high time-resolution PM data from regulatory instruments: implications for low-cost sensor evaluations. 2019 AAAR Annual Conference, Portland, OR, October 14 - 18, 2019.

Johnson, K., M. Bergin, A. Russell, AND G. Hagler. Field Test of Several Low-Cost Particulate Matter Sensors in High and Low Concentration Urban Environments. AEROSOL AND AIR QUALITY RESEARCH . Taiwan Association for Aerosol Research , Taichung City, Taiwan, 18(3):565-578, (2018). https://doi.org/10.4209/aaqr.2017.10.0418

Zheng, T., M. Bergin, K. Johnson, S. Tripathi, S. Shirodkar, M. Landis, R. Sutaria, AND D. Carlson. Field evaluation of low-cost particulate matter sensors in high- and low-concentration environments. Atmospheric Measurement Techniques. Copernicus Publications, Katlenburg-Lindau, Germany, 11(8):4823-4846, (2018). https://doi.org/10.5194/amt-11-4823-2018