A New Global 0.5° Gridded Dataset (1901–2006) of a Multiscalar Drought Index: Comparison with Current Drought Index Datasets Based on the Palmer Drought Severity Index
A New Global 0.5° Gridded Dataset (1901–2006) of a Multiscalar Drought Index: Comparison with Current Drought Index Datasets Based on the Palmer Drought Severity Index
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DOI：
10.1175/2010jhm1224.1
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发表时间：
2010-08
影响因子：
3.8
通讯作者：
S. Vicente‐Serrano;S. Beguerı́a;J. López‐Moreno;M. Angulo;A. Kenawy
中科院分区：
文献类型：
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作者：
S. Vicente‐Serrano;S. Beguerı́a;J. López‐Moreno;M. Angulo;A. Kenawy
基于Palmer干旱严重指数（PDSI），建立了一个多标量干旱指数月度全球数据集，并与现有的大陆和全球干旱数据集进行了时空变异比较。该数据集基于标准化降水蒸散发指数（SPEI）。该指数采用CRU TS3.0数据集，空间分辨率为0.5°。新数据集的优势在于：(1)提高了全球唯一干旱数据集在全球尺度上的空间分辨率；（ii）考虑到SPEI的概率性质，它与其他数据集在空间和时间上具有可比性；特别是，（iii）鉴于SPEI的多标量特征，它能够识别各种干旱类型。该数据集以三种不同的格式（网络通用数据格式（netCDF）、二进制光栅格式和纯文本格式）在西班牙国家研究委员会（CSIC）的网页上免费提供。
Abstract A monthly global dataset of a multiscalar drought index is presented and compared in terms of spatial and temporal variability with the existing continental and global drought datasets based on the Palmer drought severity index (PDSI). The presented dataset is based on the standardized precipitation evapotranspiration index (SPEI). The index was obtained using the Climatic Research Unit (CRU) TS3.0 dataset at a spatial resolution of 0.5°. The advantages of the new dataset are that (i) it improves the spatial resolution of the unique global drought dataset at a global scale; (ii) it is spatially and temporally comparable to other datasets, given the probabilistic nature of the SPEI; and, in particular, (iii) it enables the identification of various drought types, given the multiscalar character of the SPEI. The dataset is freely available on the Web page of the Spanish National Research Council (CSIC) in three different formats [network Common Data Form (netCDF), binary raster, and plain text].