该数据集包含了2012年6月14日至9月21日的通量观测矩阵中树干液流观测数据。研究区位于甘肃省张掖市盈科灌区内，根据防护林的不同高度及胸径，选取样树安装TDP(Thermal Dissipation sap flow velocity Probe, 热扩散液流计)，采用国产TDP插针式热扩散植物茎流计，型号为TDP30。样地依次为TDP-1点，TDP-2点和TDP-3点，分别位于LAS4-S，6号点和8号点附近。样树高度从高到低依次为TDP-2、TDP-1、TDP-3，胸径从大到小依次为TDP-2、TDP-3、TDP-1，以此代表整个区域进行树干液流的测量。探针安装高度为1.3米，安装方位为样树东南、西南和正北方向。\n
\nTDP的原始观测数据为探针之间的温度差，采集频率为30秒，平均时间为10分钟。发布的数据为经过计算和处理之后的树干液流数据，包括每10分钟的液流速率（cm/h）、液流通量（cm3/h）和每天的蒸腾量（mm/d）。首先根据探针之间的温度差计算液流速率和液流通量，然后根据观测点的防护林带面积和树木间距，计算得到林带单位面积的蒸腾量Q。同时对计算之后的速率和通量值进行后处理：（1）剔除明显超出物理意义或超出仪器量程的数据；（2）缺失的数据用-6999标记；（3）因探针故障等原因引起的可疑数据用红色字体标识，并剔除确认有问题的数据。\n
\n多尺度观测试验或站点信息请参考Liu et al. (2016)，观测数据处理请参考Qiao et al.(2015)。
", "ds_source": "研究区位于甘肃省张掖市盈科灌区内，根据防护林的不同高度及胸径，选取样树安装TDP(Thermal Dissipation sap flow velocity Probe, 热扩散液流计)，采用国产TDP插针式热扩散植物茎流计，型号为TDP30。样地依次为TDP-1点，TDP-2点和TDP-3点，分别位于LAS4-S，6号点和8号点附近。样树高度从高到低依次为TDP-2、TDP-1、TDP-3，胸径从大到小依次为TDP-2、TDP-3、TDP-1，以此代表整个区域进行树干液流的测量。探针安装高度为1.3米，安装方位为样树东南、西南和正北方向。
", "ds_process_way": "TDP的原始观测数据为探针之间的温度差，采集频率为30秒，平均时间为10分钟。发布的数据为经过计算和处理之后的树干液流数据，包括每10分钟的液流速率（cm/h）、液流通量（cm3/h）和每天的蒸腾量（mm/d）。首先根据探针之间的温度差计算液流速率和液流通量，然后根据观测点的防护林带面积和树木间距，计算得到林带单位面积的蒸腾量Q。同时对计算之后的速率和通量值进行后处理：（1）剔除明显超出物理意义或超出仪器量程的数据；（2）缺失的数据用-6999标记；（3）因探针故障等原因引起的可疑数据用红色字体标识，并剔除确认有问题的数据。
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "2012-06-14 00:00:00", "ds_acq_end_time": "2012-09-21 00:00:00", "ds_acq_place": "黑河流域, 中游人工绿洲试验区, 通量观测矩阵", "ds_acq_lon_east": 100.36666666666666, "ds_acq_lat_south": 38.84666666666667, "ds_acq_lon_west": 100.36666666666666, "ds_acq_lat_north": 38.84666666666667, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 5532275, "ds_files_count": 2, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "日", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "d5ee524c-c3ff-48cb-8818-d460dd43cdab.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 11:12:04", "last_updated": "2021-08-27 11:12:04", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.nieer.2020.1579", "i18n": { "en": { "title": "Heihe River eco hydrological remote sensing experiment: multi-scale observation experiment of surface evapotranspiration on non-uniform underlying surface - flux observation matrix data set (thermal diffusion liquid flow meter) (June September 2012)", "ds_format": "", "ds_source": "The study area is located in Yingke irrigation area, Zhangye City, Gansu Province. According to the different heights and DBH of the shelter forest, sample trees are selected to install TDP (thermal dispersion sap flow velocity probe), and domestic TDP pin type thermal diffusion plant stem flow meter is adopted, with the model of tdp30. The sample plots are TDP-1, tdp-2 and tdp-3, which are located near las4-s, point 6 and point 8 respectively. The height of the sample tree is tdp-2, TDP-1 and tdp-3 from high to low, and the DBH is tdp-2, tdp-3 and TDP-1 from large to small, which represents the whole area for trunk sap flow measurement. The installation height of the probe is 1.3m, and the installation directions are southeast, southwest and due north of the sample tree
", "ds_quality": "Good data quality
", "ds_ref_way": "", "ds_abstract": "The data set contains the observed data of trunk sap flow in the flux observation matrix from June 14 to September 21, 2012. The study area is located in Yingke irrigation area, Zhangye City, Gansu Province. According to the different heights and DBH of the shelter forest, sample trees are selected to install TDP (thermal dispersion sap flow velocity probe), and domestic TDP pin type thermal diffusion plant stem flow meter is adopted, with the model of tdp30. The sample plots are TDP-1, tdp-2 and tdp-3, which are located near las4-s, point 6 and point 8 respectively. The height of the sample tree is tdp-2, TDP-1 and tdp-3 from high to low, and the DBH is tdp-2, tdp-3 and TDP-1 from large to small, which represents the whole area for trunk sap flow measurement. The installation height of the probe is 1.3m, and the installation directions are southeast, southwest and due north of the sample tree.\n
\nThe original observation data of TDP is the temperature difference between probes. The acquisition frequency is 30 seconds and the average time is 10 minutes. The published data are calculated and processed trunk sap flow data, including sap flow rate (cm / h), sap flow flux (cm3 / h) and daily transpiration (mm / D) every 10 minutes. Firstly, the liquid flow rate and liquid flow volume are calculated according to the temperature difference between the probes, and then the transpiration Q per unit area of the shelterbelt is calculated according to the shelterbelt area and tree spacing of the observation point. At the same time, the post-processing of the calculated rate and flux values: (1) eliminate the data obviously beyond the physical meaning or beyond the instrument range（ 2) Missing data are marked with - 6999（ 3) Suspicious data caused by probe failure and other reasons shall be identified in red font, and the data confirmed to be problematic shall be eliminated.\n
\nFor multi-scale observation test or site information, please refer to Liu et al. (2016), and for observation data processing, please refer to Qiao et al. (2015)
", "ds_time_res": "日", "ds_acq_place": "Heihe River Basin, artificial oasis experimental area in the middle reaches, flux observation matrix", "ds_space_res": "", "ds_projection": "", "ds_process_way": "The original observation data of TDP is the temperature difference between probes. The acquisition frequency is 30 seconds and the average time is 10 minutes. The published data are calculated and processed trunk sap flow data, including sap flow rate (cm / h), sap flow flux (cm3 / h) and daily transpiration (mm / D) every 10 minutes. Firstly, the liquid flow rate and liquid flow volume are calculated according to the temperature difference between the probes, and then the transpiration Q per unit area of the shelterbelt is calculated according to the shelterbelt area and tree spacing of the observation point. At the same time, the post-processing of the calculated rate and flux values: (1) eliminate the data obviously beyond the physical meaning or beyond the instrument range（ 2) Missing data are marked with - 6999（ 3) Suspicious data caused by probe failure and other reasons shall be identified in red font, and the data confirmed to be problematic shall be eliminated
", "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": [ "热扩散液流计（TDP）", "液流通量", "蒸腾量", "液流速率", "水文气象" ], "ds_subject_tags": [ "地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域", "通量观测矩阵", "中游人工绿洲试验区" ], "ds_time_tags": [ 2012 ], "ds_contributors": [ { "true_name": "孙睿", "email": "", "work_for": "北京师范大学", "country": "中国" }, { "true_name": "刘绍民", "email": "smliu@bnu.edu.cn", "work_for": "北京师范大学", "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" } ], "ds_meta_authors": [ { "true_name": "孙睿", "email": "", "work_for": "北京师范大学", "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" }, { "true_name": "孙睿", "email": "", "work_for": "北京师范大学", "country": "中国" } ], "category": "遥感及产品" }