Analysis of Climate Comfortability Changes of Human Settlement Environment in Luoyang City in Recent 40 Years
Zhang Wei
Liu Yujie
Abstract：Based on the monthly and daily observation data of nine national meteorological stations in Luoyang City from 1981 to 2020,and according to the evaluation index of"Climate Comfortability for the Human Settlements"(GB/T 27963-2011),the regional distribution characteristics and change trends of climate comfortability of human settlement environment in Luoyang are evaluated by using linear regres-sion,correlation analysis,sliding averages,Mann-Kendall change point test and other methods.The re-sults show that:(1)Luoyang has a cold and uncomfortable level throughout the year,being chilly from November to March of the next year,cold in April and October,comfortable from May to June and Au-gust to September,and hot in July.There are no muggy months throughout the year.(2)The annual aver-age temperature-humidity index of Luoyang has a wavelike upward trend,increasing by 0.3 every 10 years on average,with a 10-year cyclical variation.The wind chill index shows a parabolic trend,and reached its peak around the year 2000.(3)There are 146-147 chilly and comfortable days in the city on average every year,and the number of cold,hot and muggy days accounts for a small percentage.(4)The comfortability level in Luoyang varies greatly among regions.Songxian County and Luoning in the central mountainous region have warmer winter,so the comfort period is longer there.Luanchuan in the moun-tainous area with higher altitude has colder winter and cooler summer,while Mengjin and Yiyang in the hilly and river valley have shorter comfort periods.The urban area and Yanshi in the plains have the most hot and muggy days.(5)The number of chilly and hot days in Luoyang did not increase significantly,the number of muggy days increased significantly after abrupt changes in 2002 and 2009,while the number of comfortable days decreased,and the number of cold days showed no clear trend.The years 2019 and 2016 are regarded as change points for chilly and comfortable days with strong rationality and high relia-bility.From the mid-late 1980s to around 2010,Luoyang had a relatively comfortable climate,but the comfortability level has continued to deteriorate since 2010,especially since 2015.
Keywords：climate comfortability of human settlement environmenttemperature-humidity indexwind chill indexdays of each comfortability levelLuoyang City
Publication Date：2025-03-30
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 64-72 )