High-frequency wind (u, w, v, Ts) and gas concentration measurements of CO2 and H2O over an agricultural field in Braunschweig, Germany
收藏资源简介:
This dataset contains high-frequency eddy covariance (EC) measurements taken from a flat agricultural field at the Thünen Institute in Braunschweig, Germany (52.30° N, 10.45° E). The data collection period spanned 12 days, from July 11, 2020, to July 25, 2020, resulting in 606 30-minute intervals. Included in the dataset are 3D wind velocity data, recorded using a uSonic-3 Class A sonic anemometer from Metek GmbH. Additionally, the dataset provides gas concentration measurements for carbon dioxide (CO2) and water vapor (H2O), captured using an LI-7500A open-path infra-red gas analyzer from LI-COR Biosciences GmbH, Germany. Variables in the dataset Variable Name Description Units time Unique time stamp (POSIXct format) Seconds since Unix epoch CO2 Wet molar density of carbon dioxide µmol m⁻³ H2O Wet molar density of water vapor mmol m⁻³ Ts Sonic temperature Kelvin u, v, w 3D wind velocity components m s⁻¹ The dataset is in RDS format (version 3), compatible with R version 3.5.0 or higher. RDS is a binary file format native to the R programming environment
本数据集包含德国不伦瑞克索恩研究所(Thünen Institute)一处平坦农田的高频涡度协方差(eddy covariance, EC)观测数据,观测点位坐标为北纬52.30°、东经10.45°。数据采集周期为12天,覆盖2020年7月11日至2020年7月25日,共计606个30分钟观测时段。 本数据集包含由德国Metek GmbH公司生产的uSonic-3 Class A超声风速仪采集的三维风速数据。此外,数据集还提供了由德国LI-COR Biosciences GmbH公司生产的LI-7500A型开放式红外气体分析仪测得的二氧化碳(CO₂)与水汽(H₂O)气体浓度数据。 本数据集包含如下变量: 变量名 描述 单位 time 唯一时间戳(POSIXct格式) 自Unix纪元起的秒数 CO₂ 二氧化碳湿摩尔密度 µmol·m⁻³ H₂O 水汽湿摩尔密度 mmol·m⁻³ Ts 超声温度 开尔文 u, v, w 三维风速分量 m·s⁻¹ 本数据集采用RDS格式(版本3),可兼容R 3.5.0及以上版本。RDS是R编程环境原生的二进制文件格式。



