{"id":"a0f26718-e057-4da3-84cd-45787d7be49b","title":"高亚洲逐日积雪覆盖率数据集（2002-2016）","title_en":"Daily fractional snow cover dataset over High Asia (2002-2016)","serial":"地球大数据科学工程专项时空三极环境项目","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":"","description":"由于青藏高原地区季节性积雪具有赋存时间短、雪层较薄的特点，在对水循环等问题的理解中，迫切需要日时间尺度的积雪覆盖率动态监测数据。本数据集基于MODIS Snow Cover Daily L3 Global 500 m Grid数据，包括MODIS/Terra上午星数据（MOD10A1）和MODIS/Aqua下午星数据（MYD10A1）的归一化积雪指数NDSI数据产品，数据格式为hdf，投影方式为正弦曲线地图投影，结合90m的SRTM地形数据和多种云覆盖下积雪覆盖率估算算法的优势，实现云覆盖条件下的积雪覆盖率再估算，满足高亚洲地区逐日少云（＜ 10％）数据产品的生产要求，构建了 2002 - 2016 年高亚洲地区 MODIS 逐日积雪覆盖率数据集。选取无云条件下的二值积雪产品作为参考，通过云量分布和积雪总面积的时空对比，表明该产品的时空特征和二值产品具有较好的一致性。以 2013 年冬季为例，当积雪覆盖率大于 50％时，其相关性可达 0.8628。本数据集可为高亚洲地区的积雪动态监测、气候环境、水文和能量平衡、灾害评估等研究提供逐日积雪覆盖率数据。","doi":"10.11888/GlaciolGeocryol.tpe.0000016.file","projection":"","language":"zh","share_type":"online","east":105.0,"west":62.0,"south":26.0,"north":46.0,"scale":250000,"crs":"","filesize":23449.6,"share_policy":"a","ts_created":"2018-02-26T03:37:01+08:00","doi_type":null,"ts_updated":"2021-04-19T10:50:39.733461+08:00","time_description":"","datas_group":3,"time_description_en":null,"data_format":"Geotiff","project":[10,11],"specials":["1832ecb3-70d0-4b5e-bdb5-2e9ff4ad1efe","f2a78cde-1c98-4241-94dc-7532eba32b80"],"cite":"邱玉宝,王星星,韩璐璐,等.2002～2016年高亚洲逐日积雪覆盖度数据集[J/OL].中国科学数据,2017,2(2).","review_status":5,"review_invite":[],"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":"","temporal_resolution":"Daily","spatial_resolution":"","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[5],"subtopics":{"metadata":"a0f26718-e057-4da3-84cd-45787d7be49b","three_pole":"XDA19070100","third_pole":null},"username":"邱玉宝","review_time":null,"protected_duration":6,"protected_describe":null,"is_important":false,"hit_count":4391}