世界屋脊生态地理区区域划分界线及其数据成果

doi:10.11821/dlxb2014S001

摘要/Abstract

摘要： 在中尺度地球观测系统数据支持下,开展在定量化和数字化基础上的综合生态地理区划研究是现代地理学重要方法论。世界屋脊生态地理区是世界海拔高度最高的地理区域,包括：青藏高原、横断山脉、喜马拉雅山脉、兴都库什山脉、帕米尔高原等。地理区域范围涉及到中国、缅甸、尼泊尔、不丹、印度、巴基斯坦、阿富汗、塔吉克斯坦、吉尔吉斯斯坦9个国家。本文对该区域界线地理信息系统数据的基本属性、特征和共享方式等给予了说明,并详细论证了在30 m空间分辨率尺度上划分世界屋脊生态地理区的理论依据和数据融合方法。在世界屋脊生态地理区区域界线产生过程中,首要的因素是以海拔高度4000 m为基准,融合了地形坡度,参考了山体完整性和生态系统整体性地理要素数据和遥感影像数据。世界屋脊生态地理区界线长度以兰伯特投影计算,边界总长度22089 km。该区域面积以阿尔伯斯投影计算,总面积为4000947 km²。结合世界屋脊生态地理区周围地理环境,该界线数据划分为40个不同的界线段,其各段数据也予以分别列出。本文对世界屋脊生态地理区东南部与四川盆地、云贵高原、横断山脉接壤段的过渡地域的区划地域归属问题予以了重点讨论。

关键词: 世界屋脊, 青藏高原, 兴都库什—喜马拉雅;, 生态地理区, 界线数据

Abstract: This dataset, titled as elevation cluster dataset covering the eco-region of the Roof of the World (ROTWEVC for short), is 30-m raster data on land elevation classification in the eco-region of the Roof of the World. 17 classes of land elevation levels are identified from less than 500 meters above sea level to more than 8000 meters. The dataset is developed based on ASTER GDEM 2 and integrated partly with SRTM where the former data is not available. By statistics, the land located between 4500-5000 meters above sea level is 910,860 km², which occupies 22.77% of the region; while the land above 4000 meters is 2,150,236 km², 53.75% of the region is located in this high area. The area with elevation less than 4000 meters is mainly distributed around area of plateau, where is the transition zone from low altitude plain to high altitude plateau. 475 datasets with 1 × 1 degree latitude and longitude, the total volume of the data is 249 MB, compressed 194 MB.

Key words: Roof of the World, eco-region, DEM, elevation, data, Qinghai-Tibet Plateau, Hindu Kush Himalaya

刘闯, 石瑞香, 陈文波. 世界屋脊生态地理区区域划分界线及其数据成果[J]. 地理学报, 2014, 69(s1): 12-19.

LIU Chuang, SHI Ruixiang, LV Tingting, CHEN Wenbo, ZHOU Xiang, WANG Zhengxing. Eco-regional boundary data of the Roof of the World[J]. Acta Geographica Sinica, 2014, 69(s1): 12-19.

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