黑河流域地表过程综合观测网（阿柔超级站涡动相关仪-2023）

该数据集包含了2023年1月1日至2023年12月31日的黑河流域地表过程综合观测网上游阿柔超级站涡动相关仪观测数据。站点位于青海省祁连县阿柔乡草大板村，下垫面是亚高山山地草甸。观测点的经纬度是100.4643E, 38.0473N，海拔3033m。涡动相关仪的架高3.5m，采样频率是10Hz，超声朝向是正北向，超声风速温度仪（CSAT3）与CO2/H2O分析仪（Li7500A）之间的距离是15cm。
涡动相关仪的原始观测数据为10Hz，发布的数据是采用Eddypro软件处理的30分钟数据，其处理的主要步骤包括：野点值剔除，延迟时间校正，坐标旋转（二次坐标旋转），频率响应修正，超声虚温修正和密度（WPL）修正等。同时对各通量值进行质量评价，主要是大气平稳性（Δst）和湍流相似性特征（ITC）的检验。对Eddypro软件输出的30min通量值也进行了筛选：（1）剔除仪器出错时的数据；（2）剔除降水前后1h的数据；（3）剔除10Hz原始数据中每30min内缺失率大于10%的数据。观测数据的平均周期为30分钟，一天48个数据，缺失数据标记为-6999。
发布的观测数据包括：日期/时间Date/Time，风向Wdir（°），水平风速Wnd（m/s），侧向风速标准差Std_Uy（m/s），超声虚温Tv（℃），水汽密度H2O（g/m3），二氧化碳浓度CO2（mg/m3），摩擦速度Ustar（m/s），奥布霍夫长度L（m），感热通量Hs（W/m2），潜热通量LE（W/m2），二氧化碳通量Fc（mg/(m2s)），感热通量的质量标识QA_Hs，潜热通量的质量标识QA_LE，二氧化碳通量的质量标识QA_Fc。感热、潜热、二氧化碳通量的质量标识分为九级（质量标识1-3数据质量好，4-6数据质量较好，7-8数据质量较差（较插补数据好）；9数据质量差））。数据时间的含义，如0:30代表0:00-0:30的平均；数据以*.xls格式存储。
黑河流域地表过程综合观测网或站点信息请参考Liu et al. (2018)和Che et al. (2019)。

This dataset contains eddy covariance observations collected at the Arou Super Station in the upper reaches of the Heihe River Basin Surface Process Comprehensive Observation Network, spanning from January 1, 2023 to December 31, 2023. The station is located in Caodaban Village, Arou Township, Qilian County, Qinghai Province, with an underlying surface of subalpine mountain meadow. The geographic coordinates of the observation site are 100.4643°E, 38.0473°N, and the elevation is 3033 m. The eddy covariance system is installed at a height of 3.5 m, with a sampling frequency of 10 Hz. The ultrasonic anemometer is oriented towards true north, and the distance between the ultrasonic anemometer-temperature probe (CSAT3) and the CO2/H2O analyzer (Li7500A) is 15 cm.

The raw observational data from the eddy covariance system are at 10 Hz. The released data are 30-minute averages processed using the EddyPro software. The primary processing steps include: outlier removal, time lag correction, double coordinate rotation, frequency response correction, ultrasonic virtual temperature correction, and density (WPL) correction, among others. Concurrently, quality assessments were conducted for each flux value, mainly involving tests of atmospheric stationarity (Δst) and turbulence similarity characteristics (ITC). Screening was also performed on the 30-minute flux outputs from EddyPro: (1) removing data collected during instrument malfunctions; (2) removing data within 1 hour before and after precipitation events; (3) excluding data with a missing rate exceeding 10% in each 30-minute segment of the 10 Hz raw data. The average temporal resolution of the observation data is 30 minutes, yielding 48 data points per day. Missing data are marked as -6999.

The released observation data include the following variables: Date/Time, wind direction Wdir (°), horizontal wind speed Wnd (m/s), lateral wind speed standard deviation Std_Uy (m/s), ultrasonic virtual temperature Tv (℃), water vapor density H2O (g/m³), carbon dioxide concentration CO2 (mg/m³), friction velocity Ustar (m/s), Obukhov length L (m), sensible heat flux Hs (W/m²), latent heat flux LE (W/m²), carbon dioxide flux Fc (mg/(m²s)), quality flag for sensible heat flux QA_Hs, quality flag for latent heat flux QA_LE, and quality flag for carbon dioxide flux QA_Fc. The quality flags for sensible heat, latent heat, and carbon dioxide fluxes are divided into nine levels: levels 1–3 indicate good data quality, 4–6 indicate fair data quality, 7–8 indicate poor quality but better than interpolated data, and 9 indicates very poor data quality. The meaning of the data timestamp is as follows: for example, 0:30 represents the average over the period 0:00–0:30. All data are stored in *.xls format.

For information about the Heihe River Basin Surface Process Comprehensive Observation Network or the station, please refer to Liu et al. (2018) and Che et al. (2019).

搜集汇总

背景与挑战

背景概述

该数据集包含2023年黑河流域阿柔超级站的涡动相关仪观测数据，涵盖风向、风速、感热通量、潜热通量等参数，数据经过Eddypro软件处理和质量筛选，适用于地表过程研究。