Abstract
This paper investigated the spatial and temporal variations of the Universal Thermal Climate Index (UTCI) of the China-Pakistan Economic Corridor (CPEC) from 1979 to 2018. The European Centre for Medium-Range Weather Forecasts Re-Analysis-Interim (ERA-Interim) reanalysis data from the European Centre for Medium-Range Weather Forecasts (ECMWF) is selected for UTCI calculation in the region and analyzed by a linear trend and correlation analysis. The results showed that (1) the UTCI of CPEC is decreased with the increase of latitude and altitude. There is obvious spatial heterogeneity in the seasonal scale and the spatial distribution of different thermal stress categories. (2) UTCI generally exhibited a positive trend of 0.33 °C/10a over the past 40 years, and the seasonal variation characteristics of UTCI show an upward trend in all four seasons, of which spring is the fastest. On the space scale, the growth trend has significant spatial variations. (3) Temperature has a positive correlation with UTCI. The influence of temperature on UTCI is greater than that of wind speed. The results of this study will be helpful for regional planning and also contribute to comprehending the characteristics of the thermal environment in CPEC.
Highlights
Thermal comfort is a bio-meteorological index based on the principle of heat exchange between human body and near-Earth atmosphere to evaluate human comfort in different climate conditions from the perspective of meteorology [1]
China-Pakistan Economic Corridor (CPEC) decreased with thegeographical increase of latitude and altitude, that it was of the natural latitude and altitude, indicating that it was under the influence of the natural geographical conditions
The results showed that the lowest month of the Universal Thermal Climate Index (UTCI) was January, followed by December and February
Summary
Thermal comfort is a bio-meteorological index based on the principle of heat exchange between human body and near-Earth atmosphere to evaluate human comfort in different climate conditions from the perspective of meteorology [1]. Thermal comfort has an important impact on human society in many fields, such as public health [2,3], energy consumption [4], urban planning [5], tourism and leisure [6]. The global climate is experiencing a significant change, characterized by warming [7]. In this process, changes in climate factors such as temperature, humidity, wind speed, radiation and so on will have an impact on climate comfort. The research on climate comfort and its change can provide a scientific basis for the development of related fields and the formulation of adaptive measures. The simple thermal indices have been developed over the last
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