A suite of global, cross-scale topographic variables for environmental and biodiversity modeling.

A suite of global, cross-scale topographic variables for environmental and biodiversity modeling.
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DOI:
10.1038/sdata.2018.40
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发表时间:
2018-03-20
期刊:
影响因子:
9.8
通讯作者:
Jetz W
Jetz W
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Amatulli G;Domisch S;Tuanmu MN;Parmentier B;Ranipeta A;Malczyk J;Jetz W

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地形变化支撑着水文学、气候学、地理学和生态学中的无数模式和过程,是理解地球上生命变化的关键。一个完全标准化和全球性的不同地形特征的多元产品具有支持许多大规模研究应用的潜力,然而,到目前为止,这样的数据集是不可用的。我们使用GLOBAL 250 m GMTED2010和近GLOBAL 90 m SRTM4.1dev的数字高程模型产品,得出了一套地形变量:高程、坡度、坡向、东度、北度、粗糙度、地形粗糙度指数、地形位置指数、矢量粗糙度、剖面/切向曲率、一阶/二阶偏导数和10个地貌地貌等级。我们使用几种聚集方法将每个变量聚集成1、5、10、50和100 KM的空间颗粒。虽然相互关联强调了许多变量的高度相似性,但更详细的四个山区的视图显示了地方差异,以及不同空间颗粒上聚合变量的尺度变化。所有新开发的变量均可从数据引用1下载,也可从http://www.earthenv.org/topography.下载和可视化
Topographic variation underpins a myriad of patterns and processes in hydrology, climatology, geography and ecology and is key to understanding the variation of life on the planet. A fully standardized and global multivariate product of different terrain features has the potential to support many large-scale research applications, however to date, such datasets are unavailable. Here we used the digital elevation model products of global 250 m GMTED2010 and near-global 90 m SRTM4.1dev to derive a suite of topographic variables: elevation, slope, aspect, eastness, northness, roughness, terrain roughness index, topographic position index, vector ruggedness measure, profile/tangential curvature, first/second order partial derivative, and 10 geomorphological landform classes. We aggregated each variable to 1, 5, 10, 50 and 100 km spatial grains using several aggregation approaches. While a cross-correlation underlines the high similarity of many variables, a more detailed view in four mountain regions reveals local differences, as well as scale variations in the aggregated variables at different spatial grains. All newly-developed variables are available for download at Data Citation 1 and for download and visualization at http://www.earthenv.org/topography.
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