J
John G. Watson
Researcher at Desert Research Institute
Publications - 463
Citations - 34243
John G. Watson is an academic researcher from Desert Research Institute. The author has contributed to research in topics: Particulates & Air quality index. The author has an hindex of 93, co-authored 453 publications receiving 31379 citations. Previous affiliations of John G. Watson include University of Nevada, Reno & The Graduate Center, CUNY.
Papers
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Journal ArticleDOI
The dri thermal/optical reflectance carbon analysis system: description, evaluation and applications in U.S. Air quality studies
Judith C. Chow,John G. Watson,Lyle C. Pritchett,William R. Pierson,Clifton A. Frazier,Rick Purcell +5 more
TL;DR: In this paper, a variation of the thermal/optical reflectance method has been applied to over 27,000 samples taken in more than a dozen urban and regional air quality studies in the U.S.
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Spatial and seasonal distributions of carbonaceous aerosols over China
Junji Cao,Junji Cao,Junji Cao,Shuncheng Lee,Judith C. Chow,John G. Watson,Kin Fai Ho,Renjian Zhang,Zhangdong Jin,Zhenxing Shen,G. C. Chen,Y. M. Kang,Shichun Zou,L. Z. Zhang,Shi-hua Qi,Minhan Dai,Yan Cheng,K. Hu +17 more
TL;DR: In this paper, simultaneous measurements of atmospheric organic and elemental carbon (OC and EC) were taken during winter and summer seasons at 2003 in 14 cities in China, and PM2.5 samples were analyzed for OC and EC by the Interagency Monitoring of Protected Visual Environments (IMPROVE) thermal/optical reflectance protocol.
Journal ArticleDOI
Visibility: Science and Regulation
TL;DR: Simpler models representing transport, limiting precursor pollutants, and gas-to-particle equilibrium should be used to understand where and when emission reductions will be effective, rather than large complex models that have insufficient input and validation measurements.
Journal ArticleDOI
Comparison of IMPROVE and NIOSH Carbon Measurements
TL;DR: In this paper, the IMPROVE and NIOSH thermal evolution protocols were applied to 60 ambient and source samples from different environments using the same instrument to quantify differences in implemented protocols.
Journal ArticleDOI
The IMPROVE_A Temperature Protocol for Thermal/Optical Carbon Analysis: Maintaining Consistency with a Long-Term Database
Judith C. Chow,John G. Watson,L.-W. Antony Chen,M.-C. Oliver Chang,Norman F. Robinson,Dana L. Trimble,Steven D. Kohl +6 more
TL;DR: A method to detect small quantities of O2 in the pure He carrier gas shows that O2 levels above 100 ppmv also affect the comparability of thermal carbon fractions but have little effect on the IMPROVE_TOR split between OC and EC.