Long-term variation and evaluation of air quality across Hong Kong region  

作　　者：Yan Tan Shuwen Han Yi Chen Zhongbiao Wu Shun-cheng Lee 

机构地区：[1]School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266520,China [2]Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong SAR 999077,China [3]Division of Environment and Sustainability,The Hong Kong University of Science and Technology,Hong Kong SAR 999077,China [4]Key Laboratory of Environment Remediation and Ecological Health,Ministry of Education,College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China

出　　处：《Journal of Environmental Sciences》2023年第5期284-294,共11页环境科学学报（英文版）

基　　金：supported by the Research Grants Council of Hong Kong Government(Project No.T24/504/17 and T31-603/21-N);he Environment and Conservation Fund of Hong Kong Governmentt(Project No.ECF 63/2019).

摘　　要：Study of Air Quality Objectives(AQOs)and long-term changes of air pollution plays a decisive role in formulating and refining pollution control strategies.In this study,10-year variations of six major air pollutants were analyzed at seven monitoring sites in Hong Kong region.The continuous decrease of annual averaged concentrations of NO_(2),SO_(2),CO,PM_(2.5)and PM_(10)and numbers of days with severe pollution conditions validated the efficiency of the series of air pollution control schemes implemented by the Hong Kong region government.However,there is still a big gap to meet the ultimate targets described by the World Health Organization.Besides,the concentration of O_(3)at roadside and urban stations increased by 135%±25%and 37%±18%from 2011 to 2020,respectively,meanwhile the highest 8 hr averaged O_(3)concentration was observed as 294μg/m^(3)at background station in 2020,which pointed out the increasing ozone pollution in Hong Kong region.There was a great decrease in the annual times of air quality health index(AQHI)laying in“high”,“very high”and“serious”categories from 2011 to 2020 with the decrease rate of 89.70%,91.30%and 89.74%at roadside stations,and 79.03%,95.98%and 72.73%at urban stations,respectively.Nevertheless,the number of days categorized as“high”or above at roadside station was twice more than that in the urban station during the past ten years.Thus,more policies and attentions should be given to the roadside air quality and its adverse health effect to pedestrians on street.

关 键 词：Long-term variation ROADSIDE Hong Kong region air quality Air Quality Objectives(AQO) Air quality health index(AQHI) 

分 类 号：X51[环境科学与工程—环境工程]