Chin J Plant Ecol ›› 2023, Vol. 47 ›› Issue (9): 1225-1233.DOI: 10.17521/cjpe.2022.0478

Special Issue: 全球变化与生态系统 光合作用 碳循环

• Research Articles • Previous Articles     Next Articles

Influence of diurnal asymmetric warming on carbon sink capacity in a broadleaf Korean pine forest in Changbai Mountains, China

LI Wei-Bin1,2(), ZHANG Hong-Xia3, ZHANG Yu-Shu1, CHEN Ni-Na1,*()   

  1. 1Institute of Atmospheric Environment, China Meteorological Administration, Key Laboratory of Agrometeorological Disasters of Liaoning Province, Shenyang 110166, China
    2State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Ministry of Agriculture and Rural Affairs Key Laboratory of Grassland Livestock Industry Innovation;Ministry of Education Engineering Research Center of Grassland Industry, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
    3Shapotou Desert Research and Experiment Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2022-11-28 Accepted:2023-06-27 Online:2023-09-20 Published:2023-09-28
  • Contact: * CHEN Ni-Na(
  • Supported by:
    National Natural Science Foundation of China(32201329);National Natural Science Foundation of China(32201289);China Postdoctoral Science Foundation(2021M703465)


Aims Meteorological data show faster warming of the global land surface during the night than during the day in the past 50 years. However, most of the previous studies were focused on the effects of whole-day equivalent warming, and the understanding of effects of diurnal asymmetric warming remains elusive.
Methods This study evaluated the effects of diurnal asymmetric warming on carbon sink capacity using a optimization model considering photosynthetic gain and hydraulic cost in a broadleaf Korean pine (Pinus koraiensis) forest in Changbai Mountains.
Important findings Results show that the model simulations matched well with observations of net primary production based on the data measured from eddy covariance flux towers. Warming promoted carbon sequestration (11.2%-13.8%) in our study area but did not significantly affect the water use efficiency, and the positive effects on annual carbon sequestration had no statistical difference among different warming scenarios. In addition, warming increased the water stress for forest plants, subsequently increasing the loss percentage of conductivity (PLC, hydraulic vulnerability; 1.1%). In conclusion, all warming scenarios significantly enhanced the current carbon sink capacity of forests compared with ambient condition, but warming may increase the risk of forest death through hydraulic failure, which would significantly affect the future forest carbon sink.

Key words: asymmetric warming, photosynthesis, vulnerability to embolization, water use efficiency, Sperry model