{"id":"d4291415-d1cf-4486-9492-f45a7189f9c0","title":"青藏高原草地产草量数据集（2000-2019）","title_en":"Grassland yield estimation product in Qinghai-Tibet Plateau (2000-2019)","serial":"","user_limit":"为尊重知识产权、保障数据作者的权益、扩展数据中心的服务、评估数据的应用潜力，请数据使用者在使用数据所产生的研究成果中（包括公开发表的论文、论著、数据产品和未公开发表的研究报告、数据产品等成果），明确注明数据来源和数据作者。对于转载（二次或多次发布）的数据，作者还须注明原始数据来源。","instructions":"QZGY_TF_2000.img、QZGY_EF_2000.img,QZGY表示青藏高原，TF表示总产草量，EF表示可食牧草产草量，数字2000表示年份。示例内容表示青藏高原2000年总产草量与可食牧草产草量。数据格式为.img格式，数据读取方式为：ArcGIS。单位为kg/hm2，为牧草鲜重。","description":"草地产草量是重要的草地生态参数，是监测草地生产力、估算草地合理载畜量和评估草地承载状态的重要依据。青藏高原草地产草量数据利用7、8月份采集的草地样方资料与MODIS NDVI、降水量、地形参数建立多元统计方程，反演得到总产草量（鲜重，kg/hm2）和可食牧草产草量（鲜重，kg/hm2）数据，时间序列为2000-2019年，空间分辨率为250米。利用分布于四川、西藏、青海、甘肃等区域的50个样方资料验证表明，遥感反演的总产草量绝对误差平均为734.75kg/hm2，相对误差平均为24.85%，可食牧草产草量绝对误差平均为715.81kg/hm2，相对误差平均为30.52%。由于青藏高原草地类型复杂，空间异质性高，实测草地样方与MODIS影像像元存在尺度不匹配等因素，这种精度扔能够满足大区域草地遥感监测要求。本数据集可以分析青藏高原草地生产力的时空变化特征，评估青藏高原草地承载特征，提取过渡放牧区域，对青藏高原生态保护、监测及预警具有重要应用价值。","doi":"10.11888/Ecolo.tpdc.271514","projection":"WGS84","language":"zh","share_type":"protected","east":105.732465,"west":73.132818,"south":21.709277,"north":43.887225,"scale":null,"crs":null,"filesize":18600.0,"share_policy":"a","ts_created":"2021-04-27T10:17:11.085567+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-06-17T16:16:13.614101+08:00","time_description":"","datas_group":0,"time_description_en":"","data_format":null,"project":[11],"specials":["b6500306-f60b-4aa1-b0b6-0324d94866df"],"cite":null,"review_status":5,"review_invite":[{"user_name":"张扬建","username":"naqu3228","email":"zhangyj@igsnrr.ac.cn","is_cancel_expert":true},{"user_name":"郭群","username":"guoq@igsnrr.ac.cn","email":"guoq@igsnrr.ac.cn","is_cancel_expert":false}],"review_editor":{"id":66424,"last_login":"2021-08-31T17:09:37.293773+08:00","username":"YanHou","email":"ljz2hy@163.com","is_active":false,"is_staff":false,"user_name":"侯燕"},"data_sources":null,"temporal_resolution":"Yearly","spatial_resolution":"100m - 1km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[21],"subtopics":{"metadata":"d4291415-d1cf-4486-9492-f45a7189f9c0","three_pole":null,"third_pole":"2019QZKK0300"},"username":"孔令桥","review_time":null,"protected_duration":24,"protected_describe":null,"is_important":false,"hit_count":552}