{"id":"257887c7-dd92-441f-ab22-8567ebe98a4f","title":"三江源国家公园长序列地表冻融数据集——双指标算法（1979-2015）","title_en":"Long-term surface soil freeze-thaw states dataset of the Three-River_Source National Park using the dual-index algorithm (1979-2015)","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":"数据命名：数据按年建立文件夹，每个文件夹存储当年的逐日地表冻融分类结果，文件夹命名为年份（1979），数据命名为年份+儒略日（1979002）。\n数据格式为geotif。推荐使用arcmap或者Python+GDAL浏览和处理数据。","description":"本数据集采用SMMR（1979-1987）、SSM/I（1987-2009）和SSMIS（2009-2015）逐日亮温数据，由双指标（TB_37v，SG）冻融判别算法生成，分类结果包含冻结地表、融化地表、沙漠及水体四种类型。数据覆盖范围为三江源区域，空间分辨率为25.067525 km，EASE Grid投影方式，以Geotif格式存储。像元数值表征地表冻融的状态：1代表冻结，2代表融化，3代表沙漠，4代表水体。因为该数据集中所有tif文件描述的是三江源国家公园范围，所以这些文件的行列号信息是不变的，摘录如下（其中cellsize单位为m）：\nncols 52\nnrows 28\ncellsize 25067.525\nnodata_value 0","doi":"10.11888/Geocry.tpdc.270928","projection":"","language":"zh","share_type":"online","east":102.58,"west":89.15,"south":30.79,"north":37.38,"scale":null,"crs":null,"filesize":451.0,"share_policy":"a","ts_created":"2020-01-12T00:15:34.535469+08:00","doi_type":"","ts_updated":"2021-04-19T20:41:31.225880+08:00","time_description":"","datas_group":3,"time_description_en":"","data_format":null,"project":[10,11,12],"specials":["d09c103c-0e37-4b09-a609-6d77c982ae37"],"cite":null,"review_status":5,"review_invite":[{"user_name":"晋锐","username":"jinrui","email":"jinrui@lzb.ac.cn","is_cancel_expert":false}],"review_editor":{"id":21057,"last_login":"2022-04-02T11:43:37.753860+08:00","username":"gecm","email":"gechm@lzb.ac.cn","is_active":true,"is_staff":true,"user_name":"盖春梅"},"data_sources":null,"temporal_resolution":"Yearly","spatial_resolution":"1km - 10km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"257887c7-dd92-441f-ab22-8567ebe98a4f","three_pole":null,"third_pole":null},"username":"胡晓利","review_time":"2020-01-12T09:14:01.451954+08:00","protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":5389}