About

Riyang is a SCALES Postdoctoral Fellow at Duke University's Nicholas School of the Environment. His current work focuses on heat exposure and human health.

His research uses geospatial and computational methods for environmental exposure modeling and assessment, including spatiotemporally resolved models of air pollution and climate-related exposures.

He also studies environmental health and disparities by connecting environmental exposure estimates with population and health data.

Selected publications

All publications

Four-Decade (1980–2023) Surface Ozone Concentrations across the Contiguous United States: Fine-Resolution Estimates and Health Implications

Liu, R.; Chu, L.; Deziel, N. C.; Chen, K.

Environmental Science & TechnologyFirst author

Racial and Ethnic Disparities in Exposure to Short-Term NO₂ Air Pollution in California during 1980–2022

Liu, R.; Chu, L.; Rogne, T.; Ma, X.; Chen, K.

Journal of Hazardous MaterialsFirst author

Integrating Augmented In Situ Measurements and a Spatiotemporal Machine Learning Model To Back Extrapolate Historical Particulate Matter Pollution over the United Kingdom: 1980–2019

Liu, R.; Ma, Z.; Gasparrini, A.; de la Cruz, A.; Bi, J.; Chen, K.

Environmental Science & Technology, 57(51), 21605–21615First author

Open-access data products

Daily Surface Ozone (O₃) MDA8 Concentrations across the Contiguous United States (0.01° × 0.01°), 1980–2023

Liu, Riyang; Kai Chen, 2026. Yale Dataverse, V1.

Daily 24-hour Average Nitrogen Dioxide (NO₂) Concentrations over California (0.01° × 0.01°), 1980–2022

Liu, Riyang; Kai Chen, 2025. Yale Dataverse, V1.

Daily 1 km Fine Particles (PM_2.5) Concentrations across the United Kingdom, 1980–2019