黑河综合遥感联合试验的森林水文试验区包括大野口流域加密观测区和排露沟流域加密观测区。由于固定样地集中分布在排露沟流域，这些样地缺乏对整个大野口流域森林的代表性，因此2008年6月在整个大野口流域布设了43块临时森林样地。该数据集就是这43块临时样地的地面观测数据。除了对样地每木检测测量和记录林分状态、立地因子外，还进行了样地LAI的观测。\n
\n样地每木测量采用的仪器主要为皮尺、胸径尺、花杆、测树仪、罗盘仪。每木测量了胸径、树高、枝下高、横坡方向冠幅宽、顺坡方向冠幅宽、单木生长状况。利用不同手持GPS测量了样地中心点的WGS84经纬度坐标，定位误差在5-30m左右。其他样地观测因子包括：所属林场、坡向、坡位、坡度、土壤厚度、乔层郁闭度等。这些临时样地测树工作的执行时间为2008年6月2日至30日。\n
\n该数据集可以为发展森林结构参数遥感反演算法提供地面实况数据。
", "ds_source": "该数据集就是这43块临时样地的地面观测数据。除了对样地每木检测测量和记录林分状态、立地因子外，还进行了样地LAI的观测。
", "ds_process_way": "这些临时样地测树工作的执行时间为2008年6月2日至30日。LAI的补充测量时间为2008年8月24日至9月2日。测量采用的仪器为HemiVeiw鱼眼相机和LAI-2000冠层分析仪，两台仪器同时测量。需要指出的是本次测量仅用一台LAI-2000冠层分析仪进行测量。测量时每个样地测5个点，分别为中心点，正北、东、南、西。样地的LAI为5个点的均值
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "2008-06-17 00:00:00", "ds_acq_end_time": "2008-07-15 00:00:00", "ds_acq_place": "黑河流域,大野口流域加密观测区,森林水文试验区", "ds_acq_lon_east": 100.2875, "ds_acq_lat_south": 38.46666666666667, "ds_acq_lon_west": 100.30333333333333, "ds_acq_lat_north": 38.666666666666664, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 1774454, "ds_files_count": 2, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "日", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "5545a4d0-5d1b-4278-9d17-585fd9f2f067.png", "ds_thumb_from": 0, "ds_ref_way": "陈尔学, 何祺胜，黑河综合遥感联合试验：大野口流域加密观测区临时样地调查数据集（2008年），国家冰川冻土沙漠科学数据中心(www.ncdc.ac.cn)，2019，doi：10.12072/ncdc.NIEER.db1878.2022", "paper_ref_way": "", "ds_ref_instruction": "本数据由“黑河综合遥感联合试验”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": "14df1d8b-6362-4c0f-b88e-b46d4abe5db9", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596 ", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "10.12072/ncdc.NIEER.db1878.2022", "subject_codes": null, "quality_level": 3, "publish_time": "2022-03-15 17:04:40", "last_updated": "2022-03-15 17:04:40", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.NIEER.2021.1765", "i18n": { "en": { "title": "Heihe River Integrated Remote Sensing joint experiment: temporary sample plot survey data set of densified observation area in Dayekou basin (2008)", "ds_format": "", "ds_source": "The data set is the ground observation data of these 43 temporary sample plots. In addition to detecting, measuring and recording the stand status and site factors of each tree in the sample plot, the Lai of the sample plot was also observed", "ds_quality": "
Good data quality
", "ds_ref_way": "", "ds_abstract": "The forest hydrology test area of Heihe River comprehensive remote sensing joint test includes Dayekou basin intensive observation area and Pailugou basin intensive observation area. As the fixed sample plots are concentrated in the drainage ditch basin, these sample plots lack the representativeness of the forests in the whole Dayekou basin, 43 temporary forest sample plots were arranged in the whole Dayekou basin in June 2008. The data set is the ground observation data of these 43 temporary sample plots. In addition to detecting, measuring and recording the stand status and site factors of each tree in the sample plot, the Lai of the sample plot was also observed.\n
\nThe instruments used for measuring each wood in the sample plot are mainly tape measure, DBH ruler, flower stem, tree measuring instrument and compass. DBH, tree height, height under branches, crown width in cross slope direction, crown width along slope direction and single tree growth were measured. The WGS84 longitude and latitude coordinates of the central point of the sample plot are measured by different handheld GPS, and the positioning error is about 5-30m. Other sample site observation factors include: Forest Farm, slope direction, slope position, slope, soil thickness, canopy density of tree layer, etc. The implementation time of these temporary sample plot tree survey work is from 2 to 30 June 2008.\n
\nThe data set can provide ground data for the development of remote sensing inversion algorithm of forest structure parameters
", "ds_time_res": "日", "ds_acq_place": "Heihe River Basin, Dayekou River Basin, intensive observation area, forest hydrology experimental area", "ds_space_res": "", "ds_projection": "", "ds_process_way": "The implementation time of these temporary sample plot tree survey work is from 2 to 30 June 2008. The supplementary measurement time of Lai is from August 24 to September 2, 2008. The instruments used for measurement are hemiveiw fisheye camera and LAI-2000 canopy analyzer. The two instruments measure at the same time. It should be noted that only one LAI-2000 canopy analyzer is used for this measurement. During the survey, 5 points shall be measured for each sample plot, which are the central point, due north, East, South and West. The Lai of the sample plot is the mean value of 5 points
", "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": [ "森林生态系统", "生态系统", "叶面积指数", "植被", "森林" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域", "大野口流域加密观测区", "森林水文试验区" ], "ds_time_tags": [ 2008 ], "ds_contributors": [ { "true_name": "陈尔学", "email": "chenerx@caf.ac.cn", "work_for": "中国林业科学院资源信息研究所", "country": "中国" }, { "true_name": "何祺胜", "email": "hqsfei999@163.com", "work_for": "中国科学院遥感应用研究所", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "陈尔学", "email": "chenerx@caf.ac.cn", "work_for": "中国林业科学院资源信息研究所", "country": "中国" } ], "ds_managers": [ { "true_name": "陈尔学", "email": "chenerx@caf.ac.cn", "work_for": "中国林业科学院资源信息研究所", "country": "中国" } ], "category": "遥感及产品" }