Robson Creek Flux Data Release 2021_v1

This data release consists of flux tower measurements of the exchange of energy and mass between the surface and the atmospheric boundary-layer in semi-arid eucalypt woodland using eddy covariance techniques. It been processed using PyFluxPro (v3.3.0) as described in Isaac et al. (2017), https://doi.org/10.5194/bg-14-2903-2017. PyFluxPro takes data recorded at the flux tower and process this data to a final, gap-filled product with Net Ecosystem Exchange (NEE) partitioned into Gross Primary Productivity (GPP) and Ecosystem Respiration (ER). For more information about the processing levels, see https://github.com/OzFlux/PyFluxPro/wiki.
The Robson Creek site is part of the FNQ Rainforest Site along with affiliated monitoring sites at Cape Tribulation (Daintree Rainforest Observatory) and Cow Bay (Daintree Discovery Centre). The flux station is located at the foothills of the Lamb Range, part of the Wet Tropics World Heritage Area, and north-west of a 25 hectare census plot established by CSIRO in 2012. The forest is classified as Regional Ecosystem (RE) 7.3.36a, complex mesophyll vine forest (Queensland Government 2006). There are 211 species in the adjacent 25ha plot, and average tree height is 28m, ranging from 23 to 44 m. Elevation of the site is 711m and mean annual precipitation is 2000mm. The upland rainforests of the Atherton Tablelands are some of the most biodiverse and carbon dense forests in Australia. The landform of the 25ha plot which is in the dominant wind direction from the station is moderately inclined with a low relief, a 30 m high ridge running north/south through the middle of the plot and a 40 m high ridge running north/south on the eastern edge of the plot. The instruments are mounted on a free standing station at 40m. Fluxes of heat, water vapour and carbon dioxide are measured using the open-path eddy flux technique. Supplementary measurements above the canopy include temperature, humidity, windspeed, wind direction, rainfall, incoming and reflected shortwave radiation and net radiation. Note: Level 3 data for 2015 - 2018 were updated in 2018 correcting a rainfall issue in 2015 and a wind direction issue 2016 - 2018. A data gap from 2019-02-14 - 2019-02-21 was due to a major power supply failure.

本数据集发布内容为采用涡度协方差（eddy covariance）技术，对半干旱桉树林地地表与大气边界层间的能量与物质交换开展的通量塔观测数据。所有数据均按照Isaac等人（2017）的研究方法（https://doi.org/10.5194/bg-14-2903-2017），借助PyFluxPro（v3.3.0）完成处理。PyFluxPro可将通量塔采集的原始数据处理为最终的间隙填补产物，并将生态系统净交换量（Net Ecosystem Exchange, NEE）划分为总初级生产力（Gross Primary Productivity, GPP）与生态系统呼吸量（Ecosystem Respiration, ER）。若需了解更多处理等级相关信息，请访问https://github.com/OzFlux/PyFluxPro/wiki。

罗布森溪（Robson Creek）站点属于FNQ雨林站点群，一同纳入该集群的还有位于苦难角（Cape Tribulation，戴恩树雨林观测站）与考湾（Cow Bay，戴恩树探索中心）的附属监测站点。该通量站坐落于拉姆岭（Lamb Range）山麓地带，拉姆岭属于世界自然遗产湿热带区域，且位于澳大利亚联邦科学与工业研究组织（CSIRO）2012年设立的25公顷普查样地西北侧。该森林被归类为区域生态系统（RE）7.3.36a型复杂阔叶藤本林（昆士兰州政府，2006）。相邻的25公顷样地内共记录有211个物种，树木平均高度为28米，高度区间为23米至44米。该站点海拔为711米，年平均降水量达2000毫米。阿瑟顿台地（Atherton Tablelands）的高地雨林是澳大利亚生物多样性与碳密度最高的森林类型之一。该25公顷样地处于观测站的主导风向方向，整体坡度适中、地形起伏较低，一条高30米的山脊沿南北向贯穿样地中部，另有一条高40米的山脊沿南北向分布于样地东侧边界。观测仪器架设高度为40米的独立观测塔上。研究采用开放式路径涡度通量技术，对热量、水汽与二氧化碳通量进行观测。冠层上方的补充观测项目包括气温、相对湿度、风速、风向、降雨量、入射与反射短波辐射以及净辐射。备注：2015至2018年的3级数据已于2018年完成更新，修正了2015年的降雨量记录偏差与2016至2018年的风向记录偏差。2019年2月14日至2019年2月21日期间的数据缺失，系由一次大规模供电故障导致。