地理科学进展

地理科学进展 ›› 2012, Vol. ›› Issue (1): 118-122.doi: 10.11820/dlkxjz.2012.01.015

• 陆地生态系统碳收支专栏 • 上一篇    下一篇

中国河流入海颗粒态碳通量及其变化特征

朱先进1,2, 于贵瑞1, 高艳妮1,2, 王秋凤1   

  1. 1. 中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室CERN综合研究中心,北京 100101;
    2. 中国科学院研究生院,北京 100049
  • 收稿日期:2011-10-01 修回日期:2012-01-01 出版日期:2012-01-25 发布日期:2012-01-25
  • 通讯作者: 于贵瑞(1959-),男,博士生导师,研究员,主要研究方向为生态系统碳循环与全球变化。E-mail: yugr@igsnrr.ac.cn
  • 基金资助:
    中国科学院战略性先导科技专项(XDA05050601);国家重点基础研究发展规划项目(2010CB833504);国家自然科学基金项目(31061140359,30590380);中国科学院地理科学与资源研究所自主部署项目(200903007)。

Fluxes of Particulate Carbon from Rivers to the Ocean and Their Changing Tendency in China

ZHU Xianjin1,2, YU Guirui1, GAO Yanni1,2, WANG Qiufeng1   

  1. 1. Synthesis Research Center of CERN, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-10-01 Revised:2012-01-01 Online:2012-01-25 Published:2012-01-25

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摘要： 河流是连接海洋和陆地两大碳库的纽带,其碳通量是全球碳循环的重要环节。本文以《中国河流泥沙公报》的数据为基础,就中国河流入海颗粒态碳通量及其变化特征进行分析。结果表明：1965-2005 年,中国河流入海颗粒态碳通量平均为29.57 TgC·yr-1,占河流入海碳通量的42%,其中有机碳占36.02%,无机碳占63.98%,长江、黄河和珠江的颗粒态碳通量占全国河流入海颗粒态碳通量的96.25%。从2003 年开始,河流入海颗粒态碳通量呈逐年递减的趋势,但颗粒态有机碳通量在河流入海颗粒态碳通量中所占的比重有所提高。2009 年,全国通过河流泥沙输送到海洋中的碳仅为6.59 TgC,为1965-2005 年平均输碳量的22.3%。由此可见,颗粒态碳通量在河流碳通量中占有不可忽视的地位,为了准确评估中国河流及陆地生态系统的碳收支,应对颗粒态碳通量进行细致研究。

关键词: 颗粒态无机碳, 颗粒态有机碳, 碳循环, 通量, 土壤侵蚀, 中国

Abstract: The river is the linkage of terrestrial and ocean carbon pools, the flux of which is a critical component of global carbon cycle. In this paper, The authors analyze the characteristics of the fluxes of particulate carbon from rivers to the ocean (FPC) in China and predicted their tendency based on the data obtained from Bulletin of Chinese River Sediment. The results indicate that, from 1965 to 2005, the annual mean FPC is 29.57TgC yr-1, 36.02% of which is organic carbon, and the rest is inorganic carbon. FPC accounts for 42% of the river carbon fluxes. The quantity of particulate carbon flux from the Yangtze River, the Yellow River and the Pearl River accounts for 96.25% of the total amount in China. There is a decreasing tendency of FPC since 2003, while the ratio of organic part to the total shows an increasing tendency. The FPC of 2009 is only 6.59TgC穣r-1, which is only 22.3% of the annual mean FPC from 1965 to 2005. Therefore, it is necessary to lay emphasis on the fluxes of particulate carbon in terms of its significant role in river carbon fluxes and terrestrial carbon budget.

Key words: carbon cycle, China, flux, particulate inorganic carbon, particulate organic carbon, soil erosion