中国地理科学(英文版) ›› 2010, Vol. 20 ›› Issue (1): 23-29.doi: 10.1007/s11769-010-0023-2

• 论文 • 上一篇    下一篇

Seasonal Changes of Energy Fluxes in an Estuarine Wetland of Shanghai, China

GUO Haiqiang1,2, ZHAO Bin1, CHEN Jiquan1,2, YAN Yaner1, LI Bo1, CHEN Jiakuan1   

  1. 1. Coastal Ecosystems Research Station of the Yangtze River Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, Shanghai 200433, China;
    2. Department of Environmental Sciences, University of Toledo, Toledo, Ohio 43606, USA
  • 收稿日期:2009-05-21 修回日期:2009-09-22 出版日期:2009-12-01 发布日期:2010-04-23
  • 通讯作者: ZHAO Bin.E-mail:zhaobin@fudan.edu.cn E-mail:zhaobin@fudan.edu.cn
  • 基金资助:

    Under the auspices of National Natural Science Foundation of China (No.30870409,40471087);Science and Technology Commission of Shanghai (No.07DZ12038-2);the Program for New Century Excellent Talents in University (No.NCET-06-0364) funded by the Ministry of Education of China

Seasonal Changes of Energy Fluxes in an Estuarine Wetland of Shanghai, China

GUO Haiqiang1,2, ZHAO Bin1, CHEN Jiquan1,2, YAN Yaner1, LI Bo1, CHEN Jiakuan1   

  1. 1. Coastal Ecosystems Research Station of the Yangtze River Estuary, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, Shanghai 200433, China;
    2. Department of Environmental Sciences, University of Toledo, Toledo, Ohio 43606, USA
  • Received:2009-05-21 Revised:2009-09-22 Online:2009-12-01 Published:2010-04-23
  • Supported by:

    Under the auspices of National Natural Science Foundation of China (No.30870409,40471087);Science and Technology Commission of Shanghai (No.07DZ12038-2);the Program for New Century Excellent Talents in University (No.NCET-06-0364) funded by the Ministry of Education of China

摘要:

The energy budget and regulating factors were investigated over an estuarine wetland during one year of continuous measurement in 2006.The results show that the seasonal changes of the energy fluxes and Bowen ratio(β) were greatly affected by incoming shortwave radiation and canopy growth.During the non-growing season and early-growing season, sensible heat(H) dominated the energy flux, and β could reach a maximum of 2.5, while during most of the growing season, latent heat dominated the energy flux and β fluctuated from 0.4 to 1.0.The energy budget ratio in growing season was about 0.76, and the value would be higher if heat exchange during tidal flooding was in-cluded.During tidal flooding days, β was slightly higher than that at exposure days in most cases.Vegetation cover seems exert little effect on energy partitioning except in March when the standing dead grass intercepted the incoming radiation that might reach the soil surface and reduce the turbulence between soil and atmosphere, thus suppressing the evaporation from the soil though the soil mositure was high at that time.

关键词: Bowen ratio, estuarine wetland, energy partitioning, vegetation coverage, tidal flooding

Abstract:

The energy budget and regulating factors were investigated over an estuarine wetland during one year of continuous measurement in 2006.The results show that the seasonal changes of the energy fluxes and Bowen ratio(β) were greatly affected by incoming shortwave radiation and canopy growth.During the non-growing season and early-growing season, sensible heat(H) dominated the energy flux, and β could reach a maximum of 2.5, while during most of the growing season, latent heat dominated the energy flux and β fluctuated from 0.4 to 1.0.The energy budget ratio in growing season was about 0.76, and the value would be higher if heat exchange during tidal flooding was in-cluded.During tidal flooding days, β was slightly higher than that at exposure days in most cases.Vegetation cover seems exert little effect on energy partitioning except in March when the standing dead grass intercepted the incoming radiation that might reach the soil surface and reduce the turbulence between soil and atmosphere, thus suppressing the evaporation from the soil though the soil mositure was high at that time.

Key words: Bowen ratio, estuarine wetland, energy partitioning, vegetation coverage, tidal flooding