Publications

Aboveground Storage Tank Detection Using Faster R-CNN and High-Resolution Aerial Imagery

Published in Master Dissertation, 2021

In this study, an effort was made to locate aboveground storage tanks from remotely sensed imagery. A dataset that identifies different types of tanks was generated.

Recommended citation: Zhao, Q. (2021). Aboveground Storage Tank Detection Using Faster R-CNN and High-Resolution Aerial Imagery (Master dissertation, Duke University). http://qianyuzhao.github.io/files/AST_detection.pdf

Using High-Temporal-Resolution Ambient Data to Investigate Gas-Particle Partitioning of Ammonium over Different Seasons

Published in Environmental Science & Technology, 2020

This paper is about gas-particle partitioning of ammonia in the inorganic aerosols. It is the first time that we created the joint source-NH3/HNO3 maps to integrate sources, aerosol pH and liquid water content, and ions (altogether in one map), which can provide useful information for designing effective strategies to control particulate matter pollution.

Recommended citation: Zhao, Q., Nenes, A., Yu, H., Song, S., Xiao, Z., Chen, K., ... & Russell, A. G. (2020). Using High-Temporal-Resolution Ambient Data to Investigate Gas-Particle Partitioning of Ammonium over Different Seasons. Environmental Science & Technology, 54(16), 9834-9843. http://qianyuzhao.github.io/files/NH4paper.pdf

Aerosol pH Dynamics During Haze Periods in an Urban Environment in China: Use of Detailed, Hourly, Speciated Observations to Study the Role of Ammonia Availability and Secondary Aerosol Formation and Urban Environment

Published in Journal 1, 2019

In this study, we found high acidy (pH < 3), light pollution (total water soluble ions < 30 μg/m3), and low water content (less than 5 μg/m3) were more correlated with higher rates of sulfate formation than nitrate formation in the winter.

Recommended citation: Shi, G., Xu, J., Shi, X., Liu, B., Bi, X., Xiao, Z., ... & Russell, A. G. (2019). Aerosol pH dynamics during haze periods in an urban environment in China: Use of detailed, hourly, speciated observations to study the role of ammonia availability and secondary aerosol formation and urban environment. Journal of Geophysical Research: Atmospheres, 124(16), 9730-9742. http://qianyuzhao.github.io/files/aerosol_ph_dynamics.pdf

High-Resolution Data Sets Unravel the Effects of Sources and Meteorological Conditions on Nitrate and Its Gas-Particle Partitioning

Published in Environmental Science & Technology, 2019

The findings of this work provide an effective approach for exploring the formation mechanisms of nitrate under different influencing factors.

Recommended citation: Shi, X., Nenes, A., Xiao, Z., Song, S., Yu, H., Shi, G., ... & Russell, A. G. (2019). High-resolution data sets unravel the effects of sources and meteorological conditions on nitrate and its gas-particle partitioning. Environmental science & technology, 53(6), 3048-3057. http://qianyuzhao.github.io/files/NO3_paper.pdf

Aerosols in an arid environment: The role of aerosol water content, particulate acidity, precursors, and relative humidity on secondary inorganic aerosols

Published in Science of The Total Environment, 2019

This study demonstrated that aerosol water content and particulate acidity were positively associated with secondary SO4, while NO2 and RH had a significant impact on secondary NO3 in an arid atmosphere. The findings explain the relationship between gaseous precursors, relative humidity, aerosol pH and temperature in the arid city of Hohhot.

Recommended citation: Wang, H., Ding, J., Xu, J., Wen, J., Han, J., Wang, K., ... & Russell, A. G. (2019). Aerosols in an arid environment: The role of aerosol water content, particulate acidity, precursors, and relative humidity on secondary inorganic aerosols. Science of the Total Environment, 646, 564-572. http://qianyuzhao.github.io/files/aerosol_arid_env.pdf

Qianyu Zhao