Photosynthetically active radiation, canopy gap fraction, and leaf area index at the EucFACE

Data for the paper in press at Global Change Biology: Remko A. Duursma, Teresa E. Gimeno, Matthias M. Boer, Kristine Y. Crous, Mark G. Tjoelker, David S. Ellsworth, Canopy leaf area of a mature evergreen Eucalyptus woodland does not respond to elevated atmospheric [CO2] but tracks water availability.
All data files are the result of extensive processing of raw data from automated sensors at the EucFACE, most notably the PAR (photosynthetically active radiation) sensors above and below the canopy. Also included are averages of air temperature, soil water content, and other radiation measures at EucFACE or nearby sites.
This package includes the following files (filename keyword supplied only):
- GAPFRACLAI: daily canopy gap fraction and leaf area index for the six EucFACE rings. This file can be constructed from processing of the other files included.
- LEAFLITTER: dry weight and area of (approx.) monthly collection of litter in eight locations in each FACE ring.
- PARAGG: 30min averages of radiation data (PAR below and above the canopy, diffuse radiation, etc.)
- PHOTOGAPFRAC: canopy gap fraction estimated from analysis of canopy photos
- DAILYMET: simple daily averages of common meteorological variables
- SOLVARS: solar angle, day length, time of sunset and sunrise in Richmond, NSW.

本数据集对应发表于《Global Change Biology》（全球变化生物学）的待刊论文，论文标题为《成熟常绿桉树林冠叶面积对大气升高CO₂浓度无响应，但随水分有效性动态变化》，作者为Remko A. Duursma、Teresa E. Gimeno、Matthias M. Boer、Kristine Y. Crous、Mark G. Tjoelker及David S. Ellsworth。
所有数据文件均基于EucFACE平台自动化传感器的原始数据经深度处理所得，其中最具代表性的为冠层上下方的光合有效辐射（photosynthetically active radiation，PAR）传感器数据。数据集同时收录了EucFACE及其邻近站点的空气温度、土壤含水量及其他辐射测量数据的平均值。
本数据集包含以下文件（仅列出文件名关键词）：
- GAPFRACLAI：6个EucFACE样环的每日冠层间隙分数与叶面积指数。该文件可通过本数据集内其他文件的处理流程生成。
- LEAFLITTER：每个FACE样环内8个采样点位的月度凋落物干重与面积（采样周期约为每月1次）。
- PARAGG：辐射数据的30分钟平均值（包含冠层上下方PAR、散射辐射等指标）。
- PHOTOGAPFRAC：通过冠层照片分析估算得到的冠层间隙分数。
- DAILYMET：常规气象变量的每日简易平均值。
- SOLVARS：新南威尔士州里士满（Richmond, NSW）地区的太阳高度角、日照时长、日出时刻与日落时刻。