文献类型：期刊文献

英文题名：Spatiotemporal Ozone Level Variation in Urban Forests in Shenzhen, China

作者：Duan, Wenjun[1] Wang, Cheng[1] Pei, Nancai[2] Zhang, Chang[1] Gu, Lin[1] Jiang, Shasha[1] Hao, Zezhou[1] Xu, Xinhui[1]

第一作者：Duan, Wenjun

通信作者：Wang, C[1]

机构：[1]Chinese Acad Forestry, Urban Forest Res Ctr, Key Lab Forest Silviculture, Res Inst Forestry,State Forestry & Grassland Adm, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China

年份：2019

卷号：10

期号：3

外文期刊名：FORESTS

收录：;EI(收录号：20191506748385);Scopus(收录号：2-s2.0-85063880504);WOS:【SSCI(收录号:WOS:000464461800003)，SCI-EXPANDED(收录号:WOS:000464461800003)】；

基金：This work was supported by Special Fund for Forestry Scientific Research in the Public Interest (No. 201404301), the National Science and Technology Pillar Program during the 13th Five-year Plan Period (No. 2015BAD07B06) and the National Natural Science Foundation of China (31570594).

语种：英文

外文关键词：urban forest; portable ozone monitor; NAAQS; micrometeorological parameter; seasonal variation

摘要：This study is among the first to investigate ozone levels in urban forests in China. It establishes that urban forest air quality in Yuanshan Forest Park (Shenzhen) is suitable for recreational activities and identifies spatial, seasonal, and diurnal O-3 patterns and relationships with micrometeorological parameters, suggesting the possibility of manipulating relevant forest characteristics to reduce Surface ozone (O-3) levels. An understanding of O-3 levels of urban forest environments is needed to assess potential effects on human health and recreational activities. Such studies in China are scarce. This study investigated urban forest O-3 levels to improve understanding and support residents engaging in forest recreational activities. We monitored O-3 levels in 2015-2016 for three urban forests representing common habitats (foothill, valley, and ridge) in Yuanshan Forest Park and for an adjacent square. The overall mean daily and daily maximum 8 h mean (MDA8) O-3 concentrations were highest for the ridge forest and lowest for the valley forest. Each forest's O-3 concentrations were highest in summer. Diurnally, forest O-3 concentrations peaked between 13:00 and 17:00 and reached a minimum between 03:00 and 09:00. The correlation between forest O-3 concentrations and air temperature (AT) was strongly positive in summer and autumn but negative in spring. In each season, O-3 concentration was negatively correlated with relative humidity (RH). No MDA8 or hourly O-3 concentrations in the forests exceeded National Ambient Air Quality Standard Grade I thresholds (100 and 160 mu g m(-3), respectively). O-3 accumulation is present in ridge urban forest in all seasons. Foothill and valley urban forests have better air quality than ridge forestation. Urban forest air quality is better in spring and autumn than in summer and is better from night-time to early morning than from noon to afternoon.