Extended Data Fig. 3: Comparison of spatial patterns of SOS and EOS along rural-urban gradients in 62 selected cities using 500 m VIIRS phenology products and 30 m urban phenology dataset during 2014-2015.
From: Artificial light at night outweighs temperature in lengthening urban growing seasons
Panel a and b represent phenology indexes derived from 500 m VIIRS phenology product. Panel c and d correspond to 30 m urban phenology data, including developed open space (Experiment A). e and f are from 30 m urban phenology excluding developed open space (Experiment B). β represented the impervious surface areas index. The dots and error bars indicate the mean values and standard error (SEM) with a 62×2 sample set in each buffer. Solid lines represent the fitted quadratic polynomial models for SOS and EOS. The fitted regression models and p-value are shown in the figures. A p-value of < 0.001 indicates that the result is statistically significant based on a one-tailed F-test with a 99.9% confidence interval.
