Table 4 Temperature zone classification Method.

From: Designing multisource blue–green cooling networks by coupling landscape pattern metrics and circuit theory

Temperature Zone Level

Classification Method

High Temperature Zone

> +

Sub-high Temperature Zone

+ 0.5 < ≤ +

Middle Temperature Zone

− 0.5 ≤ ≤ + 0.5

Sub-middle Temperature Zone

− ≤ < − 0.5

Low Temperature Zone

< −

  1. Note: Ts represents temperature, µ is the mean temperature, and std is the standard deviation of temperature. In addition to the five thermal zones, the surface heat island imbalance index (SHII) was calculated to quantify the net imbalance of the urban thermal field:
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