This study was conducted in a Dahurian larch (Larix gmelinii) plantation at the Laoshan flux site in Northeast China. The larch was planted in 1969. Themean height of the canopy trees was about 17 m.,The canopy layer was mainly composed of Dahurian larch, paper birch (Betulla platyphylla), and Northeast China ash (Flaxinus mandshurica).,The shrub layer consisted primarily of Ulmus propinqua, Corylus heterophylla, Lonicera ruprechtiana, Syringa mandshurica, Rubus sachalinensis,Sorbaria solbifolia, Acanthopanax senticosus, and Aralia elata.,The forest floor was covered with abundant herbs, primarilybelonging to the Cyperaceous and Liliaceous families .A typical temperate monsoon climate dominates this region.The turbulent fluxes of sensible heat, latent heat, CO2 were measured using the eddy covariance system.
