{"id":"3f41055a-2806-43b7-8173-e9cdf6d107ad","title":"青藏高原河湖冰范围/覆盖度数据集V1.0（2002-2018）","title_en":"The Tibet Plateau river lake ice range / coverage data set V1.0（2002-2018）","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":"数据集包含5834个栅格文件、一个矢量文件。栅格为“每日湖冰范围”。矢量文件包含了被处理湖泊的编号、名称、位置、表面积和分类号等信息。用户可以首先使用矢量文件来确定数量,位置和分类的一个给定的湖,然后得到相应的日常冰覆盖数据，","description":"青藏高原湖泊众多，该地区湖泊冰期物候和持续时间对区域和全球气候变化非常敏感，因此被用作气候变化研究的关键指标，特别是地球三极环境变化对比研究。但由于其自然环境恶劣，人口稀少，缺乏对湖泊冰物候的常规现场测量。利用中分辨率成像光谱仪(MODIS)归一化差雪指数(NDSI)数据，以500米的分辨率对湖泊冰进行了监测，填补了观测空白。利用传统的雪图算法对晴天条件下的湖泊日冰量和覆盖范围进行检测，利用湖泊表面条件的时空连续性，通过一系列步骤对云层覆盖条件下的湖泊日冰量和覆盖范围进行重新确定。通过时间序列分析308个大于3km2的湖泊确定为湖冰范围和覆盖的有效记录,形成每日湖冰范围和覆盖数据集,包括216个湖泊。","doi":"10.11922/sciencedb.744","projection":"WGS84","language":"zh","share_type":"online","east":105.0,"west":62.0,"south":26.0,"north":46.0,"scale":null,"crs":null,"filesize":323.0,"share_policy":"a","ts_created":"2019-10-25T17:29:54.008274+08:00","doi_type":"拥有自主知识产权","ts_updated":"2022-01-11T14:48:42.192010+08:00","time_description":"","datas_group":3,"time_description_en":"","data_format":null,"project":[10,11],"specials":["1832ecb3-70d0-4b5e-bdb5-2e9ff4ad1efe"],"cite":null,"review_status":5,"review_invite":[],"review_editor":{"id":21056,"last_login":"2022-02-09T12:02:24.544987+08:00","username":"huxiaoli","email":"huxiaoli@lzb.ac.cn","is_active":true,"is_staff":true,"user_name":"胡晓利"},"data_sources":null,"temporal_resolution":"Daily","spatial_resolution":"m","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[5],"subtopics":{"metadata":"3f41055a-2806-43b7-8173-e9cdf6d107ad","three_pole":"XDA19070201","third_pole":null},"username":"邱玉宝","review_time":"2019-10-29T07:10:51.521292+08:00","protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":3827}