研究简报
蒋高明,黄银晓,韩兴国.城市与山地森林地区夏秋季大气CO2浓度变化初探[J].环境科学学报,1998,18(1):108-111
城市与山地森林地区夏秋季大气CO2浓度变化初探
- CHANGES IN ATMOSPHERIC CO2 OF URBAN AND MOUNTAIN FOREST AREAS DURING THE SUMMER AND AUTUMN SEASONS
- 基金项目：国家自然科学基金
- 作者
- 单位
- 蒋高明
- 中国科学院植物研究所,北京 100093
- 黄银晓
- 中国科学院植物研究所,北京 100093
- 韩兴国
- 中国科学院植物研究所,北京 100093
- 摘要：CO2等温室气体的增加,引起了全球科学家与政治家的关注,温室效应及其带来的一系列生态环境改变即全球变化现象一跃成为生态学研究的最热门课题之一[1,2].
- Abstract：The CO2 concentrations and their changes during the summer and autumn seasons in the urban area of Beijing and those in the forest area of Xiaolongment Forest, Mentougou district, 114km southwest from Beijing downtown area were comparatively studied. During the summer and autumn, the CO2 concentrations in the urban area changed from 328 to 475μmol·mol-1 , with an average value of 380±19μmol·mol-1 .The atmospheric CO2 of the forest area during the summer time, when plants were growing luxuriantly,was 327±4μmol·mol-1 , lower than that in autumn. During a sunny summer day, CO2 was highest in the morning at 6:00am, then decreased when photosynthesis in the forest took place and reached the lowest level around 2:00pm. Large difference in CO2 concentration, as much as 40μmol·mol-1 was recorded. The CO2 concentration in the urban areas was 53μmol·mol-1 higher than that in the forest area, and 30μmol·mol-1 higher than the blobal mean of 350μmol·mol-1 . The seasonal and hourly changes were not conspicuous in the urban area compared with the forest area, indicating the CO2 level was strongly interred by urbanization and industrialization.
- Key words：CO2 concentration urban area forest area Beijing
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