{"id":"fb58d786-e7f8-4faa-86df-c15dca797f05","title":"基于《环北极多年冻土和地下冰状态图》的中国多年冻土分布图(第二版)（1997）","title_en":"China permafrost map based Circum-Arctic map of permafrost and ground-Ice conditions, Version 2 (1997)","serial":"冰冻圈","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":"shp 格式存储","description":"环北极多年冻土和地下冰分布图是1997年国际冻土协会联合多个国家的冻土研究机构编制的目前唯一的一个国际冻土数据图。该冻土图描述了北半球（20°N to 90°N）多年冻土的分布与属性及地下冰条件。通过连续性划分冻土范围，将多年冻土划分为连续（90-100%）、不连续（50-90%）、零星（10-50%）、岛状（<10%）和无多年冻土。最上层20米的地下冰丰度通过冰的体积百分比划分（>20%, 10-20%, <10% 和 0%）。发布的ESRI-shape文件源于1:10,000,000的纸质地图（Brown et al. 1997）。该图可用于全球气候变化、极地资源开发和环境保护等相关领域。中国部分如图例所示。更多信息参考文献（Heginbottom et al. 1993）。\n数据的格式为ESRI shapefiles，可通过美国冰雪数据中心下载（http://nsidc.org/data/ggd318.html）。","doi":"","projection":null,"language":"zh","share_type":"online","east":135.5,"west":73.2,"south":17.8,"north":53.9,"scale":null,"crs":null,"filesize":1.48,"share_policy":"a","ts_created":"2013-12-03T00:43:43+08:00","doi_type":"国际公开共享数据","ts_updated":"2021-04-19T23:55:23.696755+08:00","time_description":"1997","datas_group":3,"time_description_en":"","data_format":"矢量","project":[10,11],"specials":[],"cite":null,"review_status":5,"review_invite":[],"review_editor":null,"data_sources":null,"temporal_resolution":"Yearly","spatial_resolution":"10m - 100m","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"fb58d786-e7f8-4faa-86df-c15dca797f05","three_pole":null,"third_pole":null},"username":"盖春梅","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":7043}