{"id":"0cb6baaf-d43a-4d6b-84db-a7c5aa1c8e73","title":"亚洲高山区30km格网雪线高度数据集（2001-2019）","title_en":"30km Gridded dataset of Snowline altitude in High Mountain Asia （2001-2019）","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":"命名为HMA_ Snowline Altitude_30km_Grid，表示为亚洲高山区30km格网雪线高度数据集.\n数据格式为.shp, 可用ArcGIS软件打开；数据属性表的字段(2001、2002、...2019) 分别对应为2001-2019年各年的雪线高度，0值表示无雪线高度.","description":"亚洲高山区是地球上除南极和北极地区之外的第三大冰冻圈，分布着大量冰川积雪，不仅对全球水循环而且对亚洲中部干旱区的水资源及生态环境均有举足轻重的影响。在冰川学中，雪线作为消融期末积雪存在的下限，其高度变化信息是冰雪水资源变化的直观反映，也常用于指示冰川物质平衡，直接反映着冰川的进退。本数据集以2001—2019年逐日MODIS积雪产品为主要数据源，首先对逐日的MODIS积雪覆盖率产品进行去云处理，获得积雪覆盖日数（SCD）数据集；并用冰川年物质平衡观测数据、融雪末期Landsat数据对提取终年积雪的MODIS SCD阈值进行率定；然后以MODIS SCD提取的终年积雪面积结合地形“面积—高程”曲线实现大尺度融雪末期雪线高度信息的提取，最后得到2001-2019年亚洲高山区30km格网雪线高度数据集。本数据集可为亚洲高山区冰冻圈及气候变化等相关研究提供数据支持。","doi":"10.11888/Snow.tpdc.270996","projection":"WGS84","language":"zh","share_type":"offline","east":102.0,"west":68.1,"south":27.35,"north":50.45,"scale":null,"crs":null,"filesize":0.5,"share_policy":"c","ts_created":"2020-11-04T15:27:06.137415+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-04-19T17:48:39.328694+08:00","time_description":"2001-2019年","datas_group":0,"time_description_en":"2001-2019","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[{"user_name":"张国庆","username":"gqzhang","email":"guoqing.zhang@itpcas.ac.cn","is_cancel_expert":false}],"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":[403,404],"subtopics":{"metadata":"0cb6baaf-d43a-4d6b-84db-a7c5aa1c8e73","three_pole":null,"third_pole":null},"username":"唐志光","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":3988}