长江流域资源与环境 >> 2011, Vol. 20 >> Issue (4): 433-.

• 生态环境 • 上一篇    下一篇

上海城市草坪CO2排放通量特征及其影响因子

梅雪英,史利江,张卫国,俞立中,杨龙元   

  1. (1.暨南大学水生生物研究所|广东 广州 510632;2.太原师范学院城市与旅游学院|山西 太原 030012;3.华东师范大学河口海岸国家重点实验室|上海 200062;4.中国科学院南京地理与湖泊研究所|江苏 南京 210008
  • 出版日期:2011-04-20

CHARACTERISTICS OF CO2 EMISSION FLUXES AND ITS INFLUENCING FACTORS IN URBAN LAWN IN SHANGHAI,CHINA

MEI Xueying1,3, SHI Lijiang2, ZHANG Weiguo3, |YU Lizhong3,YANG Longyuan4   

  1. (1.Institute of Hydrobiology,Jinan University, Guangzhou 510632,China|2.Department of Geography,Taiyuan Normal University,Taiyuan 030012,China|3.State Key Laboratory of Estuarine and Coastal Research,East China Normal University, Shanghai 200062,China; 4.Nanjing Institute of Geography &|Limnology,Chinese Academy of Sciences, Nanjing 210008,China
  • Online:2011-04-20

摘要:

草坪是城市绿地系统的重要组成部分,为量化其在城市碳平衡中的作用,采用静态箱气相色谱法对上海结缕草草坪CO2排放通量进行了研究。结果表明:CO2排放通量具有明显的日变化和季节变化特征,日变化表现为昼高夜低的特点,最大排放通量一般出现在正午前后,最小在清晨,最大日较差为1 1877 mg/(m2·h)(7月1日),最小892 mg/(m2·h)(1月3日)。CO2排放通量的季节变化呈单峰型,夏季7月最大,春秋季次之,冬季1月最小,与温度的季节变化一致。观测期间年平均CO2排放通量为6194 mg/(m2·h)。对上海城市结缕草草坪观测期间,温度是CO2排放通量变化的主要影响因素。研究成果不仅可为城市草坪碳排放提供基础数据,也可为城市碳循环研究和管理提供参考.

Abstract:

Urban lawn,as the main part of urban green land,plays very important role in regulating the carbon balance in city.The characteristics of CO2 emission flux over an urban lawn ecosystem in Shanghai were studied with the static closed chamber sampling technique and gas chromatograph analysis.The results showed that CO2 emission flux exhibited an obvious diurnal and seasonal variation.The daily maximum values appeared at about noon when the temperature was highest,while the daily minimum values appeared at night or dawn when the temperature was lowest.The maximum daily variation range was 1 1876 mg /(m2·h)(1st July),and the minimum one was 892 mg /(m2·h)(3rd Jan.). The seasonal variation of the flux showed the maximum value in summer and the minimum one in winter,which was caused by temperature and plant growth.During the observation period,the annual average value CO2 flux was 6194 mg /(m2·h).Temperature was the main factor influencing the CO2 flux in the studied lawn,while soil moisture seemed not a significant factor.The results provide the basic data of CO2 flux in urban lawn,which can contribute to the study and management of carbon cycle in the city.

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