长江中游城市群大气环境容量演变特征分析  

Evolution Characteristics of Atmospheric Environmental Capacity in the Midstream Urban Agglomeration

作　　者：孙杰 任永建 高媛[3] SUN Jie;REN Yong-jian;GAO Yuan(Hubei Information and Technology Guarantee Center,Wuhan 430074,China;Hubei Meteorological Service Center,Wuhan 430205,China;Wuhan Regional Climate Center,Wuhan 430074,China)

机构地区：[1]湖北省信息与技术保障中心,湖北武汉430074 [2]湖北省气象服务中心,湖北武汉430205 [3]武汉区域气候中心,湖北武汉430074

出　　处：《长江流域资源与环境》2022年第1期202-211,共10页Resources and Environment in the Yangtze Basin

基　　金：湖北省气象局科技基金重点项目(2019Z09);中国气象局气候变化专项(CCSF202033,CCSF202008)。

摘　　要：为厘清长江中游各城市群大气环境容量的演变特征,为科学制定适应减缓的政策提供技术支撑。本研究基于1961~2016年气象台站定时观测资料,采用国标法计算了中游城市群近56 a大气稳定度、混合层厚度和大气环境容量系数。结果表明:近56 a来,中游城市群大气稳定度基本以中性类居多,稳定类次之,不稳定类最少。武汉城市圈中性类频率有显著的下降趋势,达到-3.4%/10a,不稳定和稳定类则表现显著的上升趋势,分别为1.9和1.5%/10a;环长株潭和环鄱阳湖城市圈的不稳定类频率变化均不明显;但中性类频率上升趋势显著,分别为0.3和1.2%/10a,稳定类频率呈显著下降趋势,分别为0.3和1.1%/10a。武汉城市圈春、夏季混合层厚度要高于秋、冬季;夏、秋、冬三季均呈现下降趋势,分别为0.1、6.0和43.9 m/10a,春季呈上升趋势,达到9.3 m/10a。环长株潭城市圈和环鄱阳湖城市圈四季混合层厚度均为下降趋势。年内大气环境容量系数呈倒"U"型分布,峰值出现在夏季,秋、冬季为低值时段;56 a来各城市圈大气环境容量系数逐渐下降,下降速率分别为1.6×10^(4)、0.9×10^(4)和1.8×10^(4)(km^(2)/a)/10a。近56 a大气稳定度增加,混合层厚度下降以及风速减小是中游城市群大气环境容量系数减小、大气自净能力减弱的主要原因。We clarify the evolution characteristics of atmospheric environmental capacity of urban agglomerations in the middle reaches of the Yangtze River and provide technical support for scientific formulation of mitigation policies.Based on the regular observation data of meteorological stations from 1961 to 2016,the national standard method was used to calculate the atmospheric stability,mixed layer thickness and atmospheric environmental capacity coefficient of the midstream urban agglomeration in the past 56 years.The results show that in the past 56 years,the middle-stream urban agglomerations have basically been mostly neutral,followed by stable ones,and unstable ones the least.The frequency of the neutral class in the Wuhan city circle has a significant downward trend at -3.4%/10 a,while the unstable and stable classes show a significant upward trend at 1.9%/10 a and 1.5%/10 a.The frequency of the unstable class in the city circle around Changsha-Zhutan and Poyang Lake have no obvious change;but the upward trend of the frequency of the neutral class is significant at 0.3%/10 a and 1.2%/10 a,and the stable frequency shows a significant downward trend at 0.3%/10 a and 1.1%/10 a.The thickness of the mixed layer of Wuhan urban circle in spring and summer is higher than that in autumn and winter;summer,of which during autumn and winter all show a downward trend at 0.1 m/10 a,6.0 m/10 a and 43.9 m/10 a,and that in spring shows an upward trend at 9.3 m/10 a.The thickness of the mixed layer of the four seasons in the city circle around Changsha-Zhutan and Poyang Lake both declined.The atmospheric environmental capacity coefficient was in an inverted U-shaped distribution,with the peak value occurring in summer,and autumn and winter were periods of low values.In the 56 years,the atmospheric environmental capacity coefficient of each city circle has gradually declined at 1.6×10^(4),0.9×10^(4) and 1.8×10^(4)(km^(2)/a)/10 a,corresponding to increased atmospheric stability,decreased thickness of the mixed layer,and decreas

关 键 词：中游城市群 大气环境容量系数 大气稳定度 混合层厚度 

分 类 号：X26[环境科学与工程—环境科学]