{"id":"df621390-a7b6-4d61-ab3d-60856558c74c","title":"青藏高原荒漠样点实测植物地上生物量和遥感净初级生产力数据集（2000-2020）","title_en":"Dataset of measured aboveground plant biomass and remote sensing net primary productivity in desert sites on theTibet Plateau (2000-2020)","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":"文件命名：文件的名称为“Desert Vegetation Productivity Dataset.xlsx\"，代表青藏高原52个荒漠样点实测植物地上生物量和遥感净初级生产力数据集。 数据读取方式：该数据集采用Excel文件存储，可以直接利用Excel打开读取、编辑、复制。","description":"在青海和西藏的荒漠带实地调查了52个样点，于2019年和2020年7-8月植被生长最大时期对植被地上生物量进行实地采样。同时，利用手持 GPS设备，记录了实验位点的经度、纬度和海拔等信息。样方的野外设置方法为：选取一块植被均匀的地段，当植被相对茂盛时样地设置为10米x10米的正方形样地，当植被相对稀疏时样地设置为30米x30米的正方形样地或者30米x90米的长方形样地；在设置好的样地中随机投掷3-5个小样方框（1米x1米），采用样方收割法收集植物样品：在1平方米的样方面积内，登记植物的物种名目，每个物种的株数等信息。并将样方内的各种植物分种齐地面刈割，带回实验室内, 在恒温干燥箱内65℃条件下烘干至恒重, 测定植物样本的干重，计算样方地上生物量。 此外，还通过采样点的经度纬度提取了该52个样点的2种遥感净初级生产力数据。(1) 2000-2018年的增强型植被指数(EVI)，并计算年整合增强型植被指数(iEVI)，iEVI与净初级生产力(NPP)具有高相关性，可作为净初级生产力的替代指标(He et al. 2021, Science of The Total Environment)。(2) 2001-2020年遥感净初级生产力(NPP)及其质量控制百分比(QC)，遥感NPP数据来自MOD17A3HGF Version 6 product (https://lpdaac.usgs.gov/products/mod17a3hgfv006/)，由净光合值（总初级生产力-植物维持呼吸）计算得到。植被覆盖度低的样点，遥感净初级生产力可能存在空值(NA)。","doi":"","projection":"WGS84","language":"zh","share_type":"protected","east":101.44,"west":83.71,"south":31.42,"north":38.47,"scale":null,"crs":null,"filesize":0.25,"share_policy":"a","ts_created":"2021-06-02T10:51:32.370662+08:00","doi_type":"国际公开共享数据","ts_updated":"2021-07-16T14:48:43.328343+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":"刘永稳","username":"liuyw","email":"liuyongwen@itpcas.ac.cn","is_cancel_expert":false},{"user_name":"张扬建","username":"naqu3228","email":"zhangyj@igsnrr.ac.cn","is_cancel_expert":true}],"review_editor":{"id":42421,"last_login":"2022-04-08T15:16:51.670544+08:00","username":"任慧霞","email":"510727846@qq.com","is_active":true,"is_staff":true,"user_name":"任慧霞"},"data_sources":null,"temporal_resolution":"Yearly","spatial_resolution":"10km - 100km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[21],"subtopics":{"metadata":"df621390-a7b6-4d61-ab3d-60856558c74c","three_pole":null,"third_pole":"2019QZKK0300"},"username":"孔令桥","review_time":null,"protected_duration":24,"protected_describe":null,"is_important":false,"hit_count":816}