Tumbarumba Gas Exchange

This dataset consists of leaf gas exchange measurements made at the Tumbarumba eddy covariance site in NSW, Australia. Measurements were made during three five-day campaigns in November 2001, February 2002, May 2002. Measurements were made on the overstorey trees (Eucalyptus delegatensis) accessed using a 20-m tall cherry picker. Each day we measured about 4 A-Ci / A-PAR curves, interspersed with spot measurements of photosynthesis and stomatal conductance at ambient light, temperature and humidity. Leaves were tagged during measurements and cut at the end of the day. Specific leaf area, leaf N and P content, and Chl content were determined.本数据集涵盖澳大利亚新南威尔士州汤巴拉姆巴（Tumbarumba）涡度协方差（eddy covariance）观测场的叶片气体交换测量数据。测量工作于2001年11月、2002年2月及2002年5月分三次开展，每次持续5天。测量对象为上层林木的高山桉树（Eucalyptus delegatensis），采用20米高的高空作业车（cherry picker）完成采样作业。每日开展约4组A-Ci/A-PAR曲线测量，期间穿插进行环境光照、温度及湿度条件下的光合速率与气孔导度瞬时测定。测量过程中对叶片进行标记，并于当日采样结束后剪下叶片样品。后续完成了叶片比叶面积（specific leaf area）、氮磷含量及叶绿素（Chl）含量的实验室测定。