{"id":"46fcf412-d675-4137-a81a-a4570e45d3c7","title":"青藏高原8千米分辨率蒸散发数据集（1990-2015）","title_en":"8 km resolution evapotranspiration dataset of the Tibetan Plateau (1990-2015)","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":"文件命名：ET数据以TIFF格式存储，文件的名称为“et_yyyy.tif”，其中yyyy代表年，比如et_1990.tif就代表1990年青藏高原蒸散发空间分布状况。\n数据读取方式：tif数据可以直接用ArcGIS打开。","description":"青藏高原蒸散发是利用遥感、气象、以及野外通量观测站等数据，采用多尺度-多源数据协同的陆表蒸散遥感模型-ETWatch进行计算的。ETWatch采用了余项法与P-M公式相结合的方法计算蒸散。首先根据数据影像的特点选择适用的模型反演晴好日蒸散；遥感模型常常因为天气状况无法获取清晰的图像而造成数据缺失，为获得逐日连续的蒸散量的，引入Penman-Monteith公式，将晴好日的蒸散结果作为“关键帧”，将关键帧的地表阻抗信息为基础，构建地表阻抗时间拓展模型，填补因无影像造成的数据缺失，利用逐日的气象数据，重建蒸散量的时间序列数据，并通过数据融合模型，将中低分辨率的蒸散时间变化信息与高分辨率的蒸散空间差异信息的相结合，构建高时空分辨率蒸散数据集，从而生成青藏高原8km分辨率蒸散数据集(1990-2015)。","doi":"10.11888/Meteoro.tpdc.271033","projection":"Albers","language":"zh","share_type":"offline","east":104.63,"west":73.48,"south":25.99,"north":39.78,"scale":null,"crs":null,"filesize":10.7,"share_policy":"c","ts_created":"2020-12-22T13:09:11.767646+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-04-19T18:15:50.654535+08:00","time_description":"","datas_group":0,"time_description_en":"","data_format":null,"project":[11],"specials":["b6500306-f60b-4aa1-b0b6-0324d94866df","b6500306-f60b-4aa1-b0b6-0324d94866df"],"cite":null,"review_status":5,"review_invite":[{"user_name":"周彦昭","username":"小昭","email":"zhouyanzhao9@126.com","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":"1km - 10km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"46fcf412-d675-4137-a81a-a4570e45d3c7","three_pole":null,"third_pole":null},"username":"刘焱序","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":2015}