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Advances in Meteorology
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2021
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Article
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Fig 2
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Research Article
Spatiotemporal Variations of Drought in the Arid Region of Northwestern China during 1950–2012
Figure 2
Evolution of the SPI, SPEI, and SC-PDSI in the ARNC during 1950–2012. (a) SPI. (b) SPEI. (c) SC-PDSI.
(a)
(b)
(c)