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author:

Zhang, Rongrong (Zhang, Rongrong.) [1] | Bento, Virgílio A. (Bento, Virgílio A..) [2] | Qi, Junyu (Qi, Junyu.) [3] | Xu, Feng (Xu, Feng.) [4] | Wu, Jianjun (Wu, Jianjun.) [5] | Qiu, Jianxiu (Qiu, Jianxiu.) [6] | Li, Jianwei (Li, Jianwei.) [7] | Shui, Wei (Shui, Wei.) [8] | Wang, Qianfeng (Wang, Qianfeng.) [9]

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EI CSCD

Abstract:

Standardized Precipitation Index (SPI) and Standardized Precipitation Evapotranspiration Index (SPEI), traditionally derived at a monthly scale, are widely used drought indices. To overcome temporal-resolution limitations, we have previously developed and published a well-validated daily SPI/SPEI in situ dataset. Although having a high temporal resolution, this in situ dataset presents low spatial resolution due to the scarcity of stations. Therefore, based on the China Meteorological Forcing Dataset, which is composed of data from more than 1,000 ground-based observation sites and multiple remote sensing grid meteorological dataset, we present the first high spatiotemporal-resolution daily SPI/SPEI raster datasets over China. It spans from 1979 to 2018, with a spatial resolution of 0.1° × 0.1°, a temporal resolution of 1-day, and the timescales of 30-, 90-, and 360-days. Results show that the spatial distributions of drought event characteristics detected by the daily SPI/SPEI are consistent with the monthly SPI/SPEI. The correlation between the daily value of the 12-month scale and the monthly value of SPI/SPEI is the strongest, with linear correlation, Nash-Sutcliffe coefficient, and normalized root mean square error of 0.98, 0.97, and 0.04, respectively. The daily SPI/SPEI is shown to be more sensitive to flash drought than the monthly SPI/SPEI. Our improved SPI/SPEI shows high accuracy and credibility, presenting enhanced results when compared to the monthly SPI/SPEI. The total data volume is up to 150 GB, compressed to 91 GB in Network Common Data Form (NetCDF). It can be available from Figshare (https://doi.org/10.6084/m9.figshare.c.5823533) and ScienceDB (https://doi.org/10.57760/sciencedb.j00076.00103). © 2023 The Author(s). Published by Taylor & Francis Group and Science Press on behalf of the International Society for Digital Earth, supported by the International Research Center of Big Data for Sustainable Development Goals, and CASEarth Strategic Priority Research Programme.

Keyword:

Climate change Drought Evapotranspiration HTTP Image resolution Mean square error Remote sensing

Community:

  • [ 1 ] [Zhang, Rongrong]Fujian Provincial Key Laboratory of Remote Sensing of Soil Erosion and Disaster Protection/College of Environmental & Safety Engineering, Fuzhou University, Fuzhou, China
  • [ 2 ] [Bento, Virgílio A.]Instituto Dom Luiz, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
  • [ 3 ] [Qi, Junyu]Earth System Science Interdisciplinary Center, University of Maryland, College Park; MD, United States
  • [ 4 ] [Xu, Feng]Fujian Provincial Key Laboratory of Remote Sensing of Soil Erosion and Disaster Protection/College of Environmental & Safety Engineering, Fuzhou University, Fuzhou, China
  • [ 5 ] [Wu, Jianjun]State Key Laboratory of Earth Surface Processes and Resource Ecology/Faculty of Geographical Science, Beijing Normal University, Beijing, China
  • [ 6 ] [Qiu, Jianxiu]Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, School of Geography and Planning, Sun Yat-sen University, Guangzhou, China
  • [ 7 ] [Li, Jianwei]College of Physics and Information Engineering, Fuzhou University, Fuzhou, China
  • [ 8 ] [Shui, Wei]Fujian Provincial Key Laboratory of Remote Sensing of Soil Erosion and Disaster Protection/College of Environmental & Safety Engineering, Fuzhou University, Fuzhou, China
  • [ 9 ] [Shui, Wei]Key Lab of Spatial Data Mining & Information Sharing, Ministry of Education of China, Fuzhou, China
  • [ 10 ] [Wang, Qianfeng]Fujian Provincial Key Laboratory of Remote Sensing of Soil Erosion and Disaster Protection/College of Environmental & Safety Engineering, Fuzhou University, Fuzhou, China
  • [ 11 ] [Wang, Qianfeng]Key Lab of Spatial Data Mining & Information Sharing, Ministry of Education of China, Fuzhou, China

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Source :

Big Earth Data

ISSN: 2096-4471

Year: 2023

Issue: 3

Volume: 7

Page: 860-885

4 . 2

JCR@2023

4 . 2 0 0

JCR@2023

JCR Journal Grade:1

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 43

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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