PolyU research reveals rising soil nitrous acid emissions driven by climate change and fertilisation accelerate global ozone pollution (IMAGE)
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a, c, e Rates of change (g N ha-1 yr-1 yr−1) in total soil HONO emissions, fertilization- related emissions, and emissions during non-fertilization period, respectively. The figures display the results of linear regression analysis conducted on emission data for each grid from 1980 to 2016. The slopes of the regression are visually presented in the figures. b, d, f Time-series of soil HONO emissions for each region (Gg N ha-1 yr−1 yr-1). Magenta, blue, orange, purple, green, light blue, brown, and gold solid lines represent emissions pertaining to North America, South America, Europe, Africa, India, China, Australia, and the rest of the world (ROW), respectively, while dashed lines represent the rates of change.
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