{"id":"8b4b5f67-ee01-45ee-96a6-db8f712a2e0c","title":"北极25 km分辨率海冰表面积雪厚度数据集（2012-2020）","title_en":"25 km resolution snow depth on Arctic sea ice dataset (2012-2020)","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：海冰表面积雪厚度以TIF格式存储，文件的名称为“Nyyyymmdd_LSTM_hs.tif”，其中N代表北半球，yyyy代表年，mm代表月，dd代表天，LSTM代表采用的深度学习方法，hs代表积雪厚度。比如N20121001_LSTM_hs.tif就代表2012年10月1日北极海冰表面积雪厚度空间分布状况。\n数据读取方式：tif数据可以直接用ArcGIS打开。","description":"海冰表面积雪厚度是海冰表面积雪的重要参数之一。积雪厚度的变化可以调节海冰的变化，对地球气候系统发挥重要作用。本数据集为2012-2020年结冰期（10月-4月）逐日的海冰表面积雪厚度数据。海冰表面积雪厚度算法结合了线性回归和LSTM深度学习算法。首先根据AMSR2亮温数据和大量的实测积雪厚度数据确定最优的估算一年冰表面积雪厚度的极化梯度率，构建一年冰表面积雪厚度估算模型。LSTM的模型输入为不同的极化梯度率、37GHz通道亮温极化率，模型输出为海冰表面积雪厚度，从而确定了多年冰表面积雪厚度的估算模型。最终得到25 km空间分辨率的北极海冰表面积雪厚度数据。本数据集能有效的反映厚冰和薄冰表面的积雪厚度，与NASA发布的OIB数据吻合良好，均方根误差为7.35 cm。本数据集能够为海冰厚度的反演提供高精度的输入参数，有助于分析北极物质平衡和能量平衡。","doi":"10.11888/Snow.tpdc.271639","projection":"North_Pole_Stereographic","language":"zh","share_type":"online","east":180.0,"west":-180.0,"south":30.98,"north":90.0,"scale":null,"crs":null,"filesize":979.5,"share_policy":"a","ts_created":"2021-07-28T20:49:09.561066+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-07-31T10:29:45.177168+08:00","time_description":"2012-2020 (cold season)","datas_group":2,"time_description_en":"2012-2020 (cold season)","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[],"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":"Daily","spatial_resolution":"10km - 100km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"8b4b5f67-ee01-45ee-96a6-db8f712a2e0c","three_pole":null,"third_pole":null},"username":"李海丽","review_time":null,"protected_duration":0,"protected_describe":"保护期2年","is_important":false,"hit_count":75}