该数据集包含了2008年1月1日至2010年12月31日的涡动相关仪观测数据。站点位于北京市大兴区魏善庄，下垫面是玉米/小麦、瓜果。观测点的经纬度是116.4271E, 39.6213N，海拔20m。
\n\n涡动相关仪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，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:（0<Δst <15, <0ITC<30）; 2: （16<Δst <30, 0<ITC<30）;3:( 0<Δst <30, 31<ITC<75); 4: （31<Δst <75, 0<ITC<30）; 5: （0<Δst <75, 31<ITC<100）; 6: （76<Δst <100, ITC<100）; 7: （Δst <250, ITC<250）; 8: （Δst <1000, ITC<1000）; 其余为9）。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。
\n\n观测试验或站点信息请参考 Jia et al,(2012),数据处理请参考Liu et al.(2013)。
", "ds_source": "涡动相关仪的采集频率是10Hz，架高为3m，超声朝向是295度（正北向为0度），超声风速仪与CO2/H2O分析仪之间的距离是18cm。
", "ds_process_way": "发布的数据是采用Edire软件对原始采集的10Hz数据进行后处理得到的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（平面拟合法），频率响应修正，超声虚温修正和密度（WPL）修正等。
", "ds_quality": "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。
", "ds_acq_start_time": "2008-01-01 00:00:00", "ds_acq_end_time": "2010-12-31 00:00:00", "ds_acq_place": "北京市大兴区海河流域", "ds_acq_lon_east": 116.41638888888889, "ds_acq_lat_south": 39.61638888888889, "ds_acq_lon_west": 116.41638888888889, "ds_acq_lat_north": 39.61638888888889, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 8880282, "ds_files_count": 3, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "44001e60-ea5d-478c-8ea6-a87abc1889a5.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "用户在使用数据时需按要求对数据及文章进行引用，并对数据来源进行声明。请用户将使用本数据正式发表的文章反馈给数据提供者 （smliu@bnu.edu.cn）。", "ds_from_station": null, "organization_id": "9c4867b1-5cb1-4de0-abeb-df42547bf41e", "ds_serv_man": "李红星", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": null, "quality_level": 3, "publish_time": "2020-07-27 15:41:11", "last_updated": "2023-08-23 16:46:14", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Westdc.2020.424", "i18n": { "en": { "title": "Data set of multi-scale surface fluxes and meteorological elements in Haihe River Basin: Daxing station eddy correlator (2008-2010)", "ds_format": "", "ds_source": "The acquisition frequency of the eddy correlator is 10Hz, the frame height is 3M, the ultrasonic direction is 295 degrees (0 degrees in the north direction), and the distance between the ultrasonic anemometer and the CO2 / H2O analyzer is 18cm.
", "ds_quality": "The quality evaluation of each flux value is mainly the test of atmospheric stability (Δ st) and turbulence similarity (ITC). The 30min flux value output by edire software was also screened: (1) data in case of instrument error; (2) data in 1H before and after precipitation; (3) data with loss rate greater than 3% in every 30min of 10Hz original data; (4) observation data with weak turbulence at night (U * less than 0.1M / s). The average period of observation data is 30 minutes, 48 data in a day, and the missing data is marked as - 6999.
", "ds_ref_way": "", "ds_abstract": "The data set includes the observation data of eddy correlator from January 1, 2008 to December 31, 2010. The site is located in Weishanzhuang, Daxing District, Beijing. The underlying surface is corn / wheat, melon and fruit. The longitude and latitude of the observation point are 116.4271e, 39.6213n and 20m above sea level.
\nThe observation data released by the eddy correlator include: date / time, wind direction WDIR (?), horizontal wind speed wnd (M / s), standard deviation of lateral wind speed STD uuy (M / s), ultrasonic virtual temperature TV (℃), water vapor density H2O (g / m3), carbon dioxide concentration CO2 (mg / m3), friction velocity ustar (M / s), obkhov length, sensible heat flux HS (w / m2), latent heat flux Le (w / m2) ）, carbon dioxide flux FC (mg / (M2S)), quality mark of sensible heat flux QA ﹣ HS, quality mark of latent heat flux QA ﹣ Le, quality mark of carbon dioxide flux QA ﹣ FC. (76 & lt; Δ st & lt; 100, ITC & lt; 100); 7: (Δ st & lt; 250, ITC & lt; 250; 8: (Δ st & lt; 1000, ITC & lt; 1000); the rest is 9). The meaning of data time, for example, 0:30 represents the average of 0:00-0:30; data is stored in *. XLS format.
\nFor observation test or station information, please refer to Jia et al. (2012), and for data processing, please refer to Liu et al. (2013).
", "ds_time_res": "", "ds_acq_place": "", "ds_space_res": "", "ds_projection": "", "ds_process_way": "The published data is the 30 minute data obtained from the post-processing of the original 10 Hz data collected by the edire software. The main processing steps include: outlier elimination, delay time correction, coordinate rotation (plane fitting), frequency response correction, ultrasonic virtual temperature correction and density (WPL) correction, etc.
", "ds_ref_instruction": " \nWhen using data, users need to reference the data and articles as required, and declare the data source. Users are requested to give feedback to the data provider (smliu@bnu.edu.cn) on the articles officially published using this data." } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "https://creativecommons.org/licenses/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": [ "潜热通量", "二氧化碳通量", "涡动相关仪", "感热通量" ], "ds_subject_tags": [], "ds_class_tags": [], "ds_locus_tags": [ "海河流域", "大兴区", "北京市" ], "ds_time_tags": [ 2008, 2010 ], "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" } ], "ds_meta_authors": [ { "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": "气象" }