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Biogeosciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/bgd-10-1605-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
31 Jan 2013
Review status
This discussion paper is a preprint. It has been under review for the journal Biogeosciences (BG). The revised manuscript was not accepted.
Multiyear precipitation reduction strongly decrease carbon uptake over North China
W. P. Yuan1, D. Liu1, W. J. Dong1, S. G. Liu2, G. S. Zhou3,4, G. R. Yu5, T. B. Zhao6, J. M. Feng1,6, Z. G. Ma6, J. Q. Chen7, Y. Chen1, S. P. Chen4, S. J. Han8, J. P. Huang9, L. H. Li4, H. Z. Liu10, S. M. Liu11, M. G. Ma12, Y. F. Wang13, J. Z. Xia1, W. F. Xu1, Q. Zhang14, X. Q. Zhao15, and L. Zhao15 1State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China
2United States Geological Survey, Earth Resources Observation and Science Center, Sioux Falls, South Dakota 57198, USA
3Chinese Academy of Meteorological Sciences, Beijing 100081, China
4State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, The Chinese Academy of Sciences, Beijing 100093, China
5Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
6Key Laboratory of Regional Climate, Environment Research for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
7Department of Environmental Sciences, University of Toledo, Toledo, OH 43606, USA
8Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
9Lanzhou University, Lanzhou, Gansu 730000, China
10Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
11School of Geography, Beijing Normal University, Beijing 100875, China
12Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
13College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
14Meteorological Bureau of Gansu Province, Lanzhou, Gansu 730000, China
15Key Laboratory of Qinghai-Tibetan Plateau Biological Evolution and Adaptation, Northwest Institute of Plateau Biology, The Chinese Academy of Sciences, Xining, Qinghai, China
Abstract. Drought has been a concern of global and regional water, carbon and energy cycles. From 1999 to 2011, North China experienced a multiyear precipitation reduction, which decreased significantly water availability as indicated by decreased soil moisture and Palmer Drought Severity Index. In this study, three light use efficiency models (CASA, MODIS-GPP and EC-LUE) and one dynamic vegetation model (IBIS) were used to characterize the impacts of long-term drought on terrestrial carbon fluxes over the North China. All of four models showed the reduction in averaged GPP of 0.026–0.047 Pg C yr−1 from 1999 to 2011 compared to 1982–2011. Based on IBIS model, simulated ecosystem respiration fell from 1999 to 2011 by 0.016 Pg C yr−1. Multiple precipitation reduction changed the regional carbon uptake of 0.0014 Pg C yr−1 from 1982 to 1998 to a~net source of 0.018 Pg C yr−1. Moreover, a pronounced decrease of maize yield was found ranging from 1999 to 2011 versus the average of 1978–2011 at almost all provinces over the study region. The largest reduction of maize yield occurred in the Beijing (2499 kg ha−1 yr−1), Jilin (2180 kg ha−1 yr−1), Tianjing (1923 kg ha−1 yr−1) and Heilongjiang (1791 kg ha−1 yr−1), and maize yield anomaly was significantly correlated with the precipitation through May and September over the entire study area. Our results revealed that recent climate change, and especially drought-induced water stress, is the dominant cause of the reduction in the terrestrial carbon sink.

Citation: Yuan, W. P., Liu, D., Dong, W. J., Liu, S. G., Zhou, G. S., Yu, G. R., Zhao, T. B., Feng, J. M., Ma, Z. G., Chen, J. Q., Chen, Y., Chen, S. P., Han, S. J., Huang, J. P., Li, L. H., Liu, H. Z., Liu, S. M., Ma, M. G., Wang, Y. F., Xia, J. Z., Xu, W. F., Zhang, Q., Zhao, X. Q., and Zhao, L.: Multiyear precipitation reduction strongly decrease carbon uptake over North China, Biogeosciences Discuss., https://doi.org/10.5194/bgd-10-1605-2013, 2013.
W. P. Yuan et al.
W. P. Yuan et al.

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