Tree Growth and Above-Ground Biomass at Harvard Forest HEM and LPH Towers since 2001

Tree diameter (“dbh”) at 1.25 m above ground were recorded and stainless steel dendrometer bands for trees above 10 cm dbh were attached. Increases in tree diameter were calculated from increases in the distance between holes punched in the dendrometer bands. Tree diameters and diameter increases were used to estimate aboveground biomass and aboveground carbon storage in order to characterize the forest at the flux tower sites, and to quantify the amount of carbon being stored aboveground annually.

研究人员记录了树木离地1.25米处的胸径（dbh），并为胸径超过10厘米的树木安装了不锈钢树干测径带。通过分析树干测径带上打孔点位之间的间距增量，计算得到树木胸径的生长量。基于实测的树木胸径及其生长增量，可估算地上生物量与地上碳储量，以此表征通量塔观测站点周边的森林特征，并量化年度地上碳储存总量。