Cumberland Plain Flux Data Collection

This dataset consists of measurements of the exchange of energy and mass between the surface and the atmospheric boundary-layer in dry sclerophyll forest at Cumberland Plain using eddy covariance techniques. The eddy covariance data collected in 2012-2013 includes measurements of turbulent fluxes but not the storage flux of CO2, and the micrometeorological data does not include soil moisture or soil temperature recordings. Beginning in January, 2014, a canopy profile system was implemented, allowing for calculation of the storage term, which is added to the turbulent flux of CO2 to calculate the net ecosystem exchange accurately in records from 2014 onwards. Prior to 2014, the net ecosystem exchange includes only the turbulent flux, and no soil moisture or soil temperature data are available. The Cumberland Plain flux station is located in a dry sclerophyll forest. The Cumberland Plain Woodland is now an endangered ecological community that encompasses distinct groupings of plants growing on clayey soils. The canopy is dominated by Eucalyptus moluccana and Eucalyptus fibrosa, which host an expanding population of mistletoe. Average canopy height is 23m, the elevation of the site is 20m and mean annual precipitation is 800mm. Fluxes of water vapour, carbon dioxide and heat are quantified with the open-path eddy flux technique from a 30 m tall mast. Additional measurements above the canopy include temperature, humidity, wind speed and direction, rainfall, incoming and reflected shortwave and longwave radiation and net, diffuse and direct radiation and the photochemical reflectance index. In addition, profiles of humidity and CO2 are measured at eight levels within the canopy, as well as measurements of soil moisture content, soil heat fluxes, soil temperature, and 10-hr fuel moisture dynamics. In addition, regular monitoring of understory species abundance, mistletoe infection, leaf area index and litterfall are also performed. For additional site information, see https://www.tern.org.au/tern-observatory/tern-ecosystem-processes/cumberland-plain-supersite/ . This data is also available at http://data.ozflux.org.au .本数据集包含采用涡度协方差（eddy covariance）技术，在坎伯兰平原（Cumberland Plain）的硬叶旱林内开展的地表与大气边界层间能量与物质交换观测数据。2012-2013年采集的涡度协方差数据包含湍流通量观测，但未包含二氧化碳（CO₂）的储存通量；同期微气象数据未纳入土壤含水率与土壤温度记录。2014年1月起，站点部署了冠层廓线系统（canopy profile system），可计算储存通量项，将其与二氧化碳湍流通量结合后，可准确计算2014年及以后的生态系统净交换量（net ecosystem exchange）。2014年之前的生态系统净交换量仅包含湍流通量，且无土壤含水率与土壤温度数据。 坎伯兰平原通量观测站坐落于一片硬叶旱林内。坎伯兰平原林地现已列为濒危生态群落，其分布着生长在黏质土壤上的独特植物类群。林冠以桉叶桉（Eucalyptus moluccana）和纤维桉（Eucalyptus fibrosa）为优势种，二者均为不断扩张的槲寄生种群的寄主。该站点平均冠层高度为23米，海拔20米，年平均降水量为800毫米。 研究人员采用开放路径涡度通量技术（open-path eddy flux technique），在30米高的观测塔上量化水蒸气、二氧化碳与热量的通量。冠层上方的额外观测项目包括气温、空气湿度、风速与风向、降雨量、入射与反射短波/长波辐射，以及净辐射、散射辐射与直接辐射，还有光化学反射指数（photochemical reflectance index）。此外，团队在冠层内8个高度层开展湿度与二氧化碳廓线观测，同时测定土壤含水率、土壤热通量、土壤温度，以及10小时时滞燃料湿度动态。另外，站点还定期开展林下植物物种丰度、槲寄生侵染情况、叶面积指数（leaf area index）以及枯落物产量的监测工作。 如需获取更多站点信息，请访问https://www.tern.org.au/tern-observatory/tern-ecosystem-processes/cumberland-plain-supersite/ 。该数据集亦可在http://data.ozflux.org.au 获取。