该数据集包含了2013年7月10日至2013年12月31日的黑河水文气象观测网下游裸地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，下垫面是裸地。观测点的经纬度是101.1326E, 41.9993N，海拔878m。涡动相关仪的架高3.5m，采样频率是10Hz，超声朝向是正北向，超声风速温度仪与CO2/H2O分析仪之间的距离是15cm。
涡动相关仪的原始观测数据为10Hz，发布的数据是采用Edire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Edire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3%的数据；
（4）剔除夜间弱湍流的观测数据（u小于0.1m/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。其中7月17日-9月13日CO2/H2O分析仪进行维修，12月6日-12月11日采集器存储有问题，期间数据缺失。 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），稳定度Z/L（无量纲），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
站点位于内蒙古额济纳旗四道桥，下垫面是裸地。观测点的经纬度是101.1326E, 41.9993N，海拔878m。涡动相关仪的架高3.5m，采样频率是10Hz，超声朝向是正北向，超声风速温度仪与CO2/H2O分析仪之间的距离是15cm。
", "ds_process_way": "涡动相关仪的原始观测数据为10Hz，发布的数据是采用Edire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Edire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3%的数据；
（4）剔除夜间弱湍流的观测数据（u*小于0.1m/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。
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），稳定度Z/L（无量纲），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；
", "ds_quality": "其中7月17日-9月13日CO2/H2O分析仪进行维修，12月6日-12月11日采集器存储有问题，期间数据缺失。
", "ds_acq_start_time": "2013-07-10 00:00:00", "ds_acq_end_time": "2013-12-31 00:00:00", "ds_acq_place": "黑河流域, 裸地站, 下游天然绿洲试验区", "ds_acq_lon_east": 101.1325, "ds_acq_lat_south": 41.99916666666667, "ds_acq_lon_west": 101.1325, "ds_acq_lat_north": 41.99916666666667, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 936082, "ds_files_count": 2, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "日", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "a258bceb-4242-4c96-a977-d7acae9104f8.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "本数据由“黑河生态水文遥感试验（HiWATER）”产生，用户在使用数据时请在正文中明确声明数据的来源，并在参考文献部分引用本元数据提供的引用方式。", "ds_from_station": null, "organization_id": "c94b3578-20da-4346-9de9-c702b6ca8983", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": null, "quality_level": 3, "publish_time": "2021-08-27 16:23:45", "last_updated": "2021-08-27 16:23:45", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.nieer.2020.1584", "i18n": { "en": { "title": "Heihe River eco hydrological remote sensing test: hydrometeorological observation network data set (bare ground station vortex correlator-2013)", "ds_format": "", "ds_source": "The station is located in sidaoqiao, Ejina Banner, Inner Mongolia, with bare land underlying. The longitude and latitude of the observation point are 101.1326e, 41.9993n and the altitude is 878m. The frame height of eddy correlator is 3.5m, the sampling frequency is 10Hz, the ultrasonic direction is due north, and the distance between ultrasonic anemometer and CO2 / H2O analyzer is 15cm
", "ds_quality": "The CO2 / H2O analyzer was repaired from July 17 to September 13. There was a problem in the collector storage from December 6 to December 11, and the data was missing during this period
", "ds_ref_way": "", "ds_abstract": "The data set contains the eddy correlator observation data of bare ground stations downstream of Heihe hydrometeorological observation network from July 10, 2013 to December 31, 2013. The station is located in sidaoqiao, Ejina Banner, Inner Mongolia, with bare land underlying. The longitude and latitude of the observation point are 101.1326e, 41.9993n and the altitude is 878m. The frame height of eddy correlator is 3.5m, the sampling frequency is 10Hz, the ultrasonic direction is due north, and the distance between ultrasonic anemometer and CO2 / H2O analyzer is 15cm
\nThe original observation data of eddy correlator is 10Hz, and the released data is the 30 minute data processed by edire software. The main steps of processing include:
\nField 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 30 min flux value output by edire software is also screened:
\n（ 1) Eliminate the data in case of instrument error
\n（ 2) Eliminate the data 1H before and after precipitation
\n（ 3) Eliminate the data with deletion rate greater than 3% every 30min in the 10Hz original data
\n（ 4) Eliminate the observation data of weak turbulence at night (U < EM > less than 0.1M / s)
\nThe 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. The CO2 / H2O analyzer was repaired from July 17 to September 13. There was a problem in the collector storage from December 6 to December 11, and the data was missing during this period
\nThe 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), stability Z / L (dimensionless), 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 < / EM >. XLS format.\nFor hydrometeorological network or station information, please refer to Li et al. (2013), and for observation data processing, please refer to Liu et al. (2011)
", "ds_time_res": "日", "ds_acq_place": "Heihe River Basin, bare land station, downstream natural oasis test area", "ds_space_res": "", "ds_projection": "", "ds_process_way": "The original observation data of eddy correlator is 10Hz, and the released data is the 30 minute data processed by edire software. The main steps of processing include:
\nField 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 30 min flux value output by edire software is also screened:
\n（ 1) Eliminate the data in case of instrument error
\n（ 2) Eliminate the data 1H before and after precipitation
\n（ 3) Eliminate the data with deletion rate greater than 3% every 30min in the 10Hz original data
\n（ 4) Eliminate the observation data of weak turbulence at night (U * less than 0.1M / s)
\nThe 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
\nThe 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), stability Z / L (dimensionless), 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
", "ds_ref_instruction": " " } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "涡动相关仪", "水文气象观测网", "感热通量", "潜热通量", "二氧化碳通量", "裸地" ], "ds_subject_tags": [ "水文地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域", "裸地站", "下游天然绿洲试验区" ], "ds_time_tags": [ 2013 ], "ds_contributors": [ { "true_name": "刘绍民", "email": "smliu@bnu.edu.cn", "work_for": "北京师范大学", "country": "中国" }, { "true_name": "徐自为", "email": "xuzw@bnu.edu.cn", "work_for": "北京师范大学地理学与遥感科学学院", "country": "中国" }, { "true_name": "李新", "email": "lixin@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" }, { "true_name": "车涛", "email": "chetao@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "刘绍民", "email": "smliu@bnu.edu.cn", "work_for": "北京师范大学", "country": "中国" }, { "true_name": "徐自为", "email": "xuzw@bnu.edu.cn", "work_for": "北京师范大学地理学与遥感科学学院", "country": "中国" } ], "ds_managers": [ { "true_name": "徐自为", "email": "xuzw@bnu.edu.cn", "work_for": "北京师范大学地理学与遥感科学学院", "country": "中国" } ], "category": "水文" }