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[1]ZHANG Xin-yu,GAO Lu-peng.Overview on the Increasing Trends and Their Influencing Factors of Long-term Monitoring of Water Dissolved Organic Carbon[J].Research of Soil and Water Conservation,2009,16(03):286-290.

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Overview on the Increasing Trends and Their Influencing Factors of Long-term Monitoring of Water Dissolved Organic Carbon

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 03 Page number: 286-290 Column: Public date: 2009-06-20

Title:: Overview on the Increasing Trends and Their Influencing Factors of Long-term Monitoring of Water Dissolved Organic Carbon

Author(s):: ZHANG Xin-yu^1,3, GAO Lu-peng¹; 1. The Sub-Center for Water Monitoring and Research, Chinese Ecosystem Research Network, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
2. National Science and Technology Infrastructure Center, Beijing 100862, China;
3. Gradute University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: dissolved organic carbon; long term monitoring; variation trend; influencing factor

CLC:: X824;P342

DOI:: -

Abstract:: There are long-term increases in surface water dissolved organic carbon(DOC) on the American and the European long-term monitoring sites. Dissolved organic carbon affects the functioning of aquatic ecosystems through its influence on the increases in organic acid, acid neutralizing capacity, water colour, and on the decreases in penetrability of visible light and ultraviolet light. It also affects freshwater aquaculture, drinking water quality, estuarine and marine ecosystems, as well as a transfer of carbon from terrestrial to aquatic and marine ecosystems, forms a significant component of the global carbon cycle. The DOC concentrations in most of the rivers are very sensitive to the response of hydrological process, and to the background of watershed soil and geology. Spatially, there is a negative relationship between dissolved organic carbon and temperature. However, the influence of temperature on temporal variations at an individual site appears very different. It has been suggested that temperature, acid deposition change, atmospheric CO₂ and nitrogen enrichment were potential drivers of change in DOC in surface water. There are few long-term monitoring and research about surface water dissolved organic carbon in China except the Sanjiang wetland site of Chinese Ecosystem Research Network where monitoring the surface water dissolved organic carbon was launched in 2004. It is important to set up long-term monitoring and research of water dissolved organic carbon in typical ecosystems in China.

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