EASE Research Group 

We focus on Emerging Air pollution
and Sustainable Environment

Dr. Xiaopu LYU
PI, Assistant Professor

Dr. Lyu obtained his BSc from Zhejiang University of Technology in 2012, followed by an MPhil from Wuhan University in 2014, and a PhD in Environmental Engineering from The Hong Kong Polytechnic University (PolyU) in 2018. Prior to his affiliation with HKBU, he held various positions at PolyU from September 2017 to January 2023, including Research Associate, Postdoctoral Fellow, Research Fellow, and Research Assistant Professor. Throughout his career, he has focused on air quality research, specifically studying atmospheric reactive organics and secondary air pollution. To date, Dr. Lyu has authored over 60 scientific papers published in renowned international journals such as One Earth, Environmental Science & Technology, and Journal of Geophysical Research: Atmospheres. His research has received a total citation count of 2,500+ and an H-index of 26. He has successfully led several competitive research grants, including 2 RGC/GRF, 1 RGC/CRF (co-PI), and 1 NSFC/Young Scientist Fund. Dr. Lyu actively contributes to the scientific community as a Youth Editor for the journal The Innovation, an Editorial Board Member for the journal Frontiers in Sustainable Cities, and as a member of the Australia-China Center for Air Quality Science and Management.

Dr. Lyu won the Public Policy Research (PPR) funding of HK$648,255.00 from the Chief Executive's Policy Unit (特首政策組) of HKSAR. The proposal entitled 'What Are the Implications of COVID-19 Restrictions for Ozone Pollution Control in Hong Kong?' aims to study the changes in ozone polution and ozone formation chemistry in response to different levels of COVID-19 restrictions in mainland and HK.

The innovation of this project lies in two aspects. First, the idea of comparing the impacts of COVID-19 restrictions on ozone pollution between Guangdong and Hong Kong is novel. Although the COVID-19’s implications on ozone air pollution control were extensively studied, the effects of different levels of restriction were seldom explored. The comparison will tell ‘a tale of two cities’. Moreover, while some studies shed light on the impacts of COVID-19 lockdown on transboundary transport of ozone, the resulting changes in ozone formation regime and sensitivity in downwind regions were not studied. Second, explainable machine learning (ML) will be applied to the large amounts of observational data in Guangdong and HK. With the ML, we will deconvolve the complicated factors that shaped the changes in ozone and ozone precursors during the COVID-19 restrictions.

We always welcome talented people to join us.

Chao QIN

Postdoctoral Fellow

Hongyong LI

Exchange PhD student

Runjing ZHOU

PhD Student

Haibin Huang

PhD Student (will join us soon)

Fengyang Zhang

PhD Student (will join us soon)

Maiqi Sun

PhD Student (will join us soon)

1. Lyu, X., Li, K., Guo, H., Morawska, L., Zhou, B., Zeren, Y., Jiang, F., Chen, C., Goldstein, A.H., Xu, X. Wang, T., and etc., 2023. A synergistic ozone-climate control to address emerging ozone pollution challenges. One Earth, 6(8), pp.964-977.

2. Lyu, X., Guo, H., Zou, Q., Li, K., Xiong, E., Zhou, B., Guo, P., Jiang, F. and Tian, X., 2022. Evidence for Reducing Volatile Organic Compounds to Improve Air Quality from Concurrent Observations and In Situ Simulations at 10 Stations in Eastern China. Environmental Science & Technology, 56(22), pp.15356-15364.

3. Lyu, X., Guo, H., Yao, D., Lu, H., Huo, Y., Xu, W., Kreisberg, N., Goldstein, A.H., Jayne, J., Worsnop, D. and Tan, Y., 2020. In situ measurements of molecular markers facilitate understanding of dynamic sources of atmospheric organic aerosols. Environmental Science & Technology, 54(18), pp.11058-11069.

4. Lyu, X., Wang, N., Guo, H., Xue, L., Jiang, F., Zeren, Y., Cheng, H., Cai, Z., Han, L. and Zhou, Y., 2019. Causes of a continuous summertime O3 pollution event in Jinan, a central city in the North China Plain. Atmospheric Chemistry and Physics, 19(5), pp.3025-3042.

5. Lyu, X.P., Guo, H., Wang, N., Simpson, I.J., Cheng, H.R., Zeng, L.W., Saunders, S.M., Lam, S.H.M., Meinardi, S. and Blake, D.R., 2017. Modeling C1–C4 alkyl nitrate photochemistry and their impacts on O3 production in urban and suburban environments of Hong Kong. Journal of Geophysical Research: Atmospheres, 122(19), pp.10-539.


Full list of publications

  1. Chief Executive's Policy Unit/PPRFS, PI, What Are the Implications of COVID-19 Restrictions for Ozone Pollution Control in Hong Kong? HK$648,255, 18 months.
  2. HKEPD (23-00628), PI, Feedback Mechanism of Secondary Reactive Gases Generated in Photochemical Smog to Ozone Formation and Regional Photochemistry, HK$1,200,000, 08/2023 - 08/2025.
  3. RGC/GRF (15209223), PI, What has driven the ozone increase in Hong Kong over the past decade under stringent air pollution control?, HK$951,448, 01/2024 - 12/2026.
  4. RGC/GRF (15219621), PI, Rise in summertime ozone levels in South China: Impacts of long-range transport of Southeast Asia emissions, HK$911,317, 01/2022 – 12/2024.
  5. RGC/CRF (C5024-21G), Co-PI, Is the usual social distance sufficient to avoid airborne infection of expiratory droplets in indoor environments?, HK$4,703,090, 06/2022 – 05/2025.
  6. NSFC/Young Scientists Fund (42207111), PI, “華中地區高海拔背景大氣中過氧乙酰硝酸酯的化學過程及對臭氧生成的影響” (Chemical processes and impacts on ozone formation of peroxyacetyl nitrate in high-altitude background atmosphere of Central China), RMB300,000, 01/2023 – 12/2025.
  7. PolyU/RAP Start-up Fund (P0035690), PI, Formation mechanisms of particle-bound hydroxyl dicarboxylic acids in subtropical Hong Kong: field observation and aging experiment, HK$250,000, 03/2021 – 02/2023.
  8. PolyU/Projects of RILS (P0042901), PI, Emerging air pollution and land management under future climate, HK$100,000, 08/2022 – 07/2024.

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