Continuous wavelet power spectrum of annual and seasonal SPEI series in the three regions.

The thick black contours depict the 5% significance level of local power relative to red noise; the cone of influence (COI), where edge effects are not negligible, is shown as a lighter shade.

Bibliographic Details
Main Authors:	Yuan Yue (313562), HaiFeng Liu (11725991), XiuXiang Mu (11725994), MengSheng Qin (11725997), TingTing Wang (10276238), Qi Wang (22418), YaQiong Yan (11726000)
Format:	Still Image
Language:	unknown
Published:	2021
Subjects:	Cell Biology Molecular Biology Ecology Developmental Biology Inorganic Chemistry Environmental Sciences not elsewhere classified Biological Sciences not elsewhere classified statistically significant influence sen &# 8217 results show mitigations respectively identified using provide valuable reference potential evapotranspiration data polar &# 8211 cross wavelet transform continuous wavelet transform significant increasing trend three defined regions atlantic multidecadal oscillation scale climate patterns regional drought mitigation cwt analysis showed month time scales month period ) month period trend test decadal scales climate indices western regions southern oscillation different regions arctic oscillation month cycles year cycles xlink "> temporal characteristics slope method significantly correlated possible relationship periodic features northeast china eurasian pattern eurasia pattern drought conditions autumn drought around 120 annual scale 140 stations Arctic
Online Access:	https://doi.org/10.1371/journal.pone.0259774.g005

Description
Summary:	The thick black contours depict the 5% significance level of local power relative to red noise; the cone of influence (COI), where edge effects are not negligible, is shown as a lighter shade.