{"id":"d09ddae6-75c6-431c-a9e4-02e3067e9e1d","title":"北温带湖泊冰盖长时序数据集（1985-2020）","title_en":"Long time series data set of north temperate lake ice cover occurrence values (1985-2020)","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":"该数据以表格形式存储，每一行为一个湖泊的计算结果。湖泊信息通过表格中的“Hylak_id”列与HydroLAKEs数据集相对应。“ICO_P1(%)”、“ICO_P2(%)”、“ICO_P3(%)”、“ICO_P4(%)”四列为4个时段的ICO结果。","description":"该数据集主要包括北温带湖泊在1985-2020年间4个时段的结冰观测频率值（ICO），以及湖泊所在位置、面积、高程等信息。其中，4个时间段分别为1985-1998（P1）、1999-2006（P2）、2007-2014（P3）以及2015-2020（P4），目的是提高计算时段内的“有效观测”次数，进而提高准确度。4个时段的ICO由各个时段内所有Landsat影像统计的“结冰”次数与“有效观测”次数的比值计算，其他的湖泊信息通过表格中的“Hylak_id”列与HydroLAKEs数据集相对应。此外，该数据仅保留了P1-P4均观测有效，且面积大于1平方千米的湖泊，约为3万个。该数据集可以反映近几十年来湖泊结冰情况对气候变化的响应。(详见论文)","doi":"10.11888/Hydro.tpdc.271744","projection":"","language":"zh","share_type":"online","east":180.0,"west":-180.0,"south":23.5,"north":66.5,"scale":null,"crs":null,"filesize":3.15,"share_policy":"a","ts_created":"2021-10-09T18:59:31.362476+08:00","doi_type":"拥有自主知识产权","ts_updated":"2022-03-28T07:51:23.420132+08:00","time_description":"","datas_group":3,"time_description_en":"","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[],"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":"--","spatial_resolution":"--","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"d09ddae6-75c6-431c-a9e4-02e3067e9e1d","three_pole":null,"third_pole":null},"username":"王欣驰","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":true,"hit_count":1498}