该数据集包含了2015年1月1日至2015年12月31日的黑河水文气象观测网下游胡杨林站的涡动相关仪观测数据。站点位于内蒙古额济纳旗四道桥，下垫面是胡杨林。观测点的经纬度是101.1236E, 41.9928N，海拔876m。涡动相关仪的架高22m，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(Li7500)之间的距离是17cm。
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；
（4）剔除夜间弱湍流的观测数据（u小于0.2m/s）。 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。因仪器漂移等原因引起的可疑数据用红色字体标识。4月22日至4月25日由于涡动系统Li7500标定，数据缺失；8月17日至9月5日，由于存储卡出现问题，导致数据断断续续。\n 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三级（质量标识0:（Δst <30, ITC<30）; 1: （Δst <100, ITC<100）; 其余为2）。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。 水文气象网或站点信息请参考Li et al. (2013)，观测数据处理请参考Liu et al. (2011)。 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； （4）剔除夜间弱湍流的观测数据（u*小于0.2m/s）。 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。因仪器漂移等原因引起的可疑数据用红色字体标识。4月22日至4月25日由于涡动系统Li7500标定，数据缺失；8月17日至9月5日，由于存储卡出现问题，导致数据断断续续。 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三级（质量标识0:（Δst <30, ITC<30）; 1: （Δst <100, ITC<100）; 其余为2）。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。 数据质量良好 The original observation data of eddy correlator is 10Hz, and the released data is the 30 minute data processed by eddypro software. The main processing steps include: field value elimination, delay time correction, coordinate rotation (quadratic coordinate rotation), frequency response correction, ultrasonic virtual temperature correction and density (WPL) correction. At the same time, the quality of each flux value is evaluated, mainly the atmospheric stability（ Δ St) and turbulence similarity characteristics (ITC). The 30min flux value output by eddypro software is also screened: （ 1) Eliminate the data in case of instrument error （ 2) Eliminate the data 1H before and after precipitation （ 3) Eliminate the data with a loss rate greater than 10% every 30min in the 10Hz original data （ 4) Eliminate the observation data of weak turbulence at night (U * less than 0.2m / s) The average period of observation data is 30 minutes, 48 data a day, and the missing data is marked as - 6999. Suspicious data caused by instrument drift and other reasons shall be identified in red font. From April 22 to April 25, due to the calibration of vortex system li7500, the data was missing; From August 17 to September 5, there was a problem with the memory card, resulting in intermittent data Good data quality The data set contains the eddy correlator observation data of Populus euphratica forest station downstream of Heihe hydrometeorological observation network from January 1, 2015 to December 31, 2015. The station is located in sidaoqiao, Ejina Banner, Inner Mongolia, with Populus euphratica forest on the underlying surface. The longitude and latitude of the observation point are 101.1236e, 41.9928n and 876m above sea level. The frame height of eddy correlator is 22m, the sampling frequency is 10Hz, the ultrasonic direction is due north, and the distance between ultrasonic anemometer (csat3) and CO2 / H2O analyzer (li7500) is 17cm The original observation data of eddy correlator is 10Hz, and the released data is the 30 minute data processed by eddypro software. The main steps of processing include: Field value elimination, delay time correction, coordinate rotation (quadratic coordinate rotation), frequency response correction, ultrasonic virtual temperature correction and density (WPL) correction. At the same time, the quality of each flux value is evaluated, mainly the atmospheric stability（ Δ St) and turbulence similarity characteristics (ITC). The 30min flux value output by eddypro software is also screened: （ 1) Eliminate the data in case of instrument error （ 2) Eliminate the data 1H before and after precipitation （ 3) Eliminate the data with a loss rate greater than 10% every 30min in the 10Hz original data （ 4) Eliminate the observation data of weak turbulence at night (U < EM > less than 0.2m / s) The average period of observation data is 30 minutes, 48 data a day, and the missing data is marked as - 6999. Suspicious data caused by instrument drift and other reasons shall be identified in red font. From April 22 to April 25, due to the calibration of vortex system li7500, the data was missing; From August 17 to September 5, there was a problem with the memory card, resulting in intermittent data.\n The published observation data include: date / time, wind direction WDIR (°), horizontal wind speed wnd (M / s), standard deviation of lateral wind speed 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 identification QA of sensible heat flux_ HS, quality identification of latent heat flux QA_ Le, quality identification QA of carbon dioxide flux_ Fc。 The quality identification of sensible heat, latent heat and carbon dioxide flux is divided into three levels (quality identification 0:（ Δ st < 30, ITC< 30）; 1: （ Δ st < 100, ITC< 100）; The rest are 2). The meaning of data time, for example, 0:30 represents the average of 0:00-0:30; The data is stored in. XLS format For hydrometeorological network or station information, please refer to Li et al. (2013), and for observation data processing, please refer to Liu et al. (2011) The published observation data include: Date / time, wind direction WDIR (°), horizontal wind speed wnd (M / s), standard deviation of lateral wind speed 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 identification QA of sensible heat flux_ HS, quality identification of latent heat flux QA_ Le, quality identification QA of carbon dioxide flux_ Fc。 The quality identification of sensible heat, latent heat and carbon dioxide flux is divided into three levels (quality identification 0:（ Δ st < 30, ITC< 30）; 1: （ Δ st < 100, ITC< 100）; The rest are 2). The meaning of data time, for example, 0:30 represents the average of 0:00-0:30; The data is stored in *. XLS format