{"id":"c4a574b7-5deb-4e33-9cee-04116e585d7e","title":"青藏高原地形遮蔽度数据集（250m）","title_en":"Topographic Sheltering Index data set of Qinghai Tibet Plateau (250m)","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":"“青藏高原地形遮蔽度(250m).tif\"\n可以使用Arcmap进行数据处理。","description":"探究地貌对于青藏高原树木分布格局的机制影响，以及如何更确切的将地貌影响表现出来，一直是研究难题，地貌对于树木分布的影响是有重要意义的。根据实地和文献调查发现，有着较好的地形庇护下，无论是乔木还是灌丛植被生长都有着积极的作用。这种作用在主要包括地形对风的遮挡庇护和地形聚水增加生境土壤水分和空气湿度。本研究采用250mDEM来模拟这种对植被的遮挡效果，称为Topographic Sheltering Index（TSI，采用C语言编程，计算目标点的障碍物累计水平角，障碍物的判定条件为：障碍物与目标点之间的距离小于障碍物与目标点高差的15-20倍，倍数可调，根据高原的实际情况选定为15倍，以8km为搜索半径，10度为搜索角度），得到青藏高原地形遮蔽度。","doi":"","projection":"WGS84","language":"zh","share_type":"online","east":104.783056,"west":73.314444,"south":39.780556,"north":26.003333,"scale":null,"crs":null,"filesize":517.0,"share_policy":"a","ts_created":"2021-06-26T20:35:24.995124+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-06-26T21:34:36.138514+08:00","time_description":"1982年来","datas_group":3,"time_description_en":"","data_format":null,"project":[11],"specials":[],"cite":null,"review_status":5,"review_invite":[],"review_editor":null,"data_sources":null,"temporal_resolution":"1000 year < x","spatial_resolution":"100m - 1km","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[359],"subtopics":{"metadata":"c4a574b7-5deb-4e33-9cee-04116e585d7e","three_pole":null,"third_pole":null},"username":"程名","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":1080}