*2.5. Statistical Analysis*

All data were expressed as mean ± standard deviation. The data were analyzed by SPSS 26.0 statistical software and plotted by Origin2021. The test data all conformed to Shapiro–Wilk and Chi-squared tests. A two-way ANOVA was used to test the interaction effects of different weather and times of the day and was performed using SPSS software. A one-way ANOVA was used for multiple comparisons between different sample time points on the same day, and an independent sample *t*-test was used to analyze the significant differences between the sunny and cloudy days at the same time points. The significant difference level was set as *p* < 0.05. Data were then fitted to a cosine wave to determine the presence of a significant daily rhythm. Raw data were analyzed using Acro circadian analysis programs (University of South Carolina, USA; http://www.circadian.org/softwar.html; accessed on 7 October 2022).
