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Recent progress and future directions of ChinaFLUX

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Abstract

The eddy covariance technique has emerged as an important tool to directly measure carbon dioxide, water vapor and heat fluxes between the terrestrial ecosystem and the atmosphere after a long history of fundamental research and technological developments. With the realization of regional networks of flux measurements in North American, European, Asia, Brazil, Australia and Africa, a global-scale network of micrometeorological flux measurement (FLUXNET) was established in 1998. FLUXNET has made great progresses in investigating the environmental mechanisms controlling carbon and water cycles, quantifying spatial-temporal patterns of carbon budget and seeking the “missing carbon sink” in global terrestrial ecosystems in the past ten years. The global-scale flux measurement also built a platform for international communication in the fields of resource, ecology and environment sciences. With the continuous development of flux research, FLUXNET will introduce and explore new techniques to extend the application fields of flux measurement and to answer questions in the fields of bio-geography, eco-hydrology, meteorology, climate change, remote sensing and modeling with eddy covariance flux data. As an important part of FLUXNET, ChinaFLUX has made significant progresses in the past three years on the methodology and technique of eddy covariance flux measurement, on the responses of CO2 and H2O exchange between the terrestrial ecosystem and the atmosphere to environmental change, and on flux modeling development. Results showed that the major forests on the North-South Transect of Eastern China (NSTEC) were all carbon sinks during 2003 to 2005, and the alpine meadows on the Tibet Plateau were also small carbon sinks. However, the reserved natural grassland, Leymus chinensis steppe in Inner Mongolia, was a carbon source. On a regional scale, temperature and precipitation are the primary climatic factors that determined the carbon balance in major terrestrial ecosystems in China. Finally, the current research emphasis and future directions of ChinaFLUX were presented. By combining flux network and terrestrial transect, ChinaFLUX will develop integrated research with multi-scale, multi-process, multi-subject observations, placing emphasis on the mechanism and coupling relationships between water, carbon and nitrogen cycles in terrestrial ecosystems.

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Authors and Affiliations

  1. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Bei**g, 100101, China

    Yu Guirui, Fu Yuling, Sun **aomin, Wen Xuefa & Zhang Leiming

  2. School of Earth Sciences, Graduate University of the Chinese Academy of Sciences, Bei**g, 100049, China

    Fu Yuling, Wen Xuefa & Zhang Leiming

Authors
  1. Yu Guirui
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  2. Fu Yuling
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  3. Sun **aomin
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  4. Wen Xuefa
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  5. Zhang Leiming
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Corresponding author

Correspondence to Yu Guirui.

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Yu, G., Fu, Y., Sun, X. et al. Recent progress and future directions of ChinaFLUX. SCI CHINA SER D 49 (Suppl 2), 1–23 (2006). https://doi.org/10.1007/s11430-006-8001-3

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  • DOI: https://doi.org/10.1007/s11430-006-8001-3

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