Figure 3

Pearson correlation coefficients of different grades of the SRHII (2–4 °C, 4–6 °C, > 6 °C, > 2 °C) during the daytime (a,c,e) and nighttime (b,d,f) of 2003, 2010 and 2017.

Pearson correlation coefficients of different grades of the SRHII (2–4 °C, 4–6 °C, > 6 °C, > 2 °C) during the daytime (a,c,e) and nighttime (b,d,f) of 2003, 2010 and 2017.