Development of the DO 3 SE-Crop model to assess ozone effects on crop phenology, biomass, and yield

作者：Pritha Pande, Sam Bland, Nathan Booth, Joanne Cook, Zhaozhong Feng, Lisa Emberson · 发表于：Biogeosciences · 年份：2025 · DOI：10.5194/bg-22-181-2025 · 被引用次数：4 · 研究领域：Plant responses to elevated CO2、Atmospheric chemistry and aerosols、Atmospheric Ozone and Climate

A substantial body of empirical evidence exists to suggest that elevated O 3 levels are causing significant impacts on wheat yields at sites representative of highly productive arable regions around the world. Here we extend the DO 3 SE model (designed to estimate total and stomatal O 3 deposition for risk assessment) to incorporate a coupled A net – g sto model to estimate O 3 uptake; an O 3 damage module (that impacts instantaneous A net and the timing and rate of senescence); and a crop phenology, carbon allocation, and growth model based on the JULES-crop model. The model structure allows scaling from the leaf to the canopy to allow for multiple leaf populations and canopy layers. The DO 3 SE-Crop model is calibrated and parameterised using O 3 fumigation data from Xiaoji, China, for the year 2008 and for an O 3 -tolerant and sensitive cultivar. The calibrated model was tested on data for different years (2007 and 2009) and for two additional cultivars and was found to simulate key physiological variables, crop development, and yield with a good level of accuracy. The DO 3 SE-Crop model simulated the phenological stages of crop development under ambient and elevated O 3 treatments for the test datasets with an R 2 of 0.95 and an RMSE of 2.5 d. The DO 3 SE-Crop model was also able to simulate O 3 -induced yield losses of ∼11 % –19 % compared to observed yield losses of 12 %–34 %, with an R 2 of 0.68 ( n =20) and an RMSE of 76 g m −2 . Additionally, our results indicate tha...