SCIENTIA GEOGRAPHICA SINICA

Spatio-temporal patterns of meteorological drought and impact on vegetation in karst region and non-karst region of Southwest China

Yan Yan, Mo Jinyu, Jin Jia, Huang Yuqing, Hu Baoqing, Shi Shana

SCIENTIA GEOGRAPHICA SINICA, 2024, 44(7): 1275-1285. DOI: 10.13249/j.cnki.sgs.20221581

Table 1 Periodicity, correlation and variance contribution rate of IMF components from 1982 to 2020

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Fig. 1 Location of the study area
Fig. 2 IMFs period and trend of sc_PDSI index in Southwest China based on EEMD
Fig. 3 Annual average sc_PDSI and MK trend test in Southwest China from 1982 to 2020
Fig. 4 Spatial distribution of multi-year average sc_PDSI and MK trend test in Southwest China from 1982 to 2020
Table 2 Variation trend of sc_PDSI tested by MK in Southwest China from 1982 to 2020
Fig. 5 Correlation between sc_PDSI-1and NDVI on monthly scale and its significance in Southwest China from 1982 to 2020
Fig. 6 Correlation between sc_PDSI-12 and NDVI on annual scale and its significance in Southwest China from 1982 to 2020
Fig. 7 Correlation between sc_PDSI-24 and NDVI on long-term scale and its significance in Southwest China from 1982 to 2020
Fig. 8 Correlation coefficient between sc_PDSI and NDVI and the lag time of NDVI to sc_PDSI in Southwest China from 1982 to 2020