The alpine meadow in the Tibetan Plateau (TP) is a fragile ecosystem and very sensitive to climate change and human activities. However, the ?ux (energy, water, and carbon dioxide) exchanges (FEs) and their controls in this ecosystem are not well understood. Using two years (2015–2016) of observations from three eddy covariance towers and di?erent grazing management types, we quantifed the FEs of an alpine meadow ecosystem in the northeastern TP. A boosted regression trees (BRT)-based method was used to determine the environmental controls of FEs and clarify the factors causing the di?erences in FEs among the sites. In addition, we presented conceptual figures on how the FEs may respond to the changes in their main environmental controls. The results suggested that, (i) the ecosystem was a CO2 sink; (ii) the FEs of the ecosystem were energy-limited; and (iii) future warming will enhance GPP and Re of the ecosystem, while reduce the CO2 sink.
The study highlights that future warming will significantly change FEs of the ecosystem and will be beneficial for the ecosystem managements. The study was published on the journal of 《Agricultural and Forest Meteorology》（IF, 4.04）.
The article：Shaobo Sun, Tao Che *, Hongyi Li, Tiejun Wang, Chunfeng Ma, Bo Liu, Yuntao Wua, Zhaoliang Song *, 2019. Water and carbon dioxide exchange of an alpine meadow ecosystem in the northeastern Tibetan Plateau is energy-limited. Agricultural and Forest Meteorology, 275: 283-295.
Access via link：https://www.sciencedirect.com/science/article/pii/S0168192319302126
Fig. The influences of the major environmental factors on the fluxes（upper）；conceptual figures on how the fluxes may respond to the changes in their main environmental controls across seasons (bottom).
