Univerisity of Kentucky

College of Agriculture,
Food and Environment

Ren Lab

Climate extremes and ozone pollution: a growing threat to China’s food security


Ensuring global food security requires a sound understanding of climate and environmental controls on crop productivity in the context of global changes. This research is to quantify the combined impacts of drought and ozone pollution on China’s crop yield using a comprehensive, process-based agricultural ecosystem model in conjunction with observational data. Our results indicate that drought and O3 together led to much higher reduction in crop yield (right panel) than drought only did (left panel). Our results imply that reducing tropospheric O3 levels is critical for securing crop production in coping with increasing frequency and severity of extreme climate events such as droughts. Improving air quality should be a core component of climate adaptation strategies. 

2016 “Climate extremes and ozone pollution: a growing threat to China's food security” , Tian, H., W. Ren, B. Tao, G. Sun, A. Chappelka, X. Wang, S. Pan, J. Yang, J. Liu, B. S. Felzer, J. M. Melillo, and J. Reilly Ecosystem Health and Sustainability, 2(1), doi:10.1002/ehs2.1203 

2012 “China's crop productivity and soil carbon storage as influenced by multifactor global change”, Ren, W., H. Q. Tian, B. Tao, Y. Huang, and S. F. Pan, Global Change Biol, 18(9), 2945-2957, doi: 10.1111/j.1365-2486.2012.02741.x. 

2011 “Spatial and temporal patterns of CO2 and CH4 fluxes in China's croplands in response to multifactor environmental changes”, Ren, W., H. Q. Tian, X. F. Xu, M. L. Liu, C. Q. Lu, G. S. Chen, J. Melillo, J. Reilly, and J. Y. Liu, Tellus B, 63(2), 222-240, doi: 10.1111/j.1600-0889.2010.00522.x. 

Research Area: Global Changes and Ecosystem Dynamics