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cje ›› 2005, Vol. ›› Issue (12): 1425-1429.

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Diurnal variation of carbon dioxide flux on water-air interface of Meiliang Bay,Taihu Lake in wintertime

LI Xianghua1, HU Weiping2, YANG Longyuan2, ZHANG Fabing3, HU Zhixin2,4   

  1. 1. Jiangsu Hydrology & Resources Sunkry Bureau, Nanjing Branch, Nanjing 210008, China;
    2. Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;
    3. Shangnai Environmental Monitoring Centre, Shanghai 200030, China;
    4. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2004-12-13 Revised:2005-02-28 Online:2005-12-10

Abstract: Employing statistic box method,this paper monitored 72 h continuously the diurnal variation of carbon dioxide flux on the water-air interface of Meiliang Bay,Taihu Lake in wintertime.The results showed that in clear and breezy days,water was the sink of atmospheric carbon dioxide at daytime,and its carbon dioxide flux was about zero at night,with the mean values of carbon dioxide flux being -3.01 and-0.02 mg穖-2-1,respectively.But,in cloudy days and after a durative gale,water was a strong source of atmospheric carbon dioxide,with the maximum value 76.53 mg穖-2-1.It could be concluded that wind speed had a significant effect on CO2 flux in wintertime.

Key words: vegetation dynamic, community structure, biodiversity, climate change, vegetaion response.

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