Spatial and temporal characteristics of drought and its correlation with climate indices in Northeast China.

The spatial and temporal characteristics of drought in Northeast China are investigated, using monthly meteorological data from 140 stations over the period 1970-2014. The study area was divided into three regions using hierarchical cluster analysis based on the precipitation and potential evapotran...

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Autores principales:	Yuan Yue, HaiFeng Liu, XiuXiang Mu, MengSheng Qin, TingTing Wang, Qi Wang, YaQiong Yan
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5ef73481052c4c828503bda41dce046d
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spelling	oai:doaj.org-article:5ef73481052c4c828503bda41dce046d2021-12-02T20:12:49ZSpatial and temporal characteristics of drought and its correlation with climate indices in Northeast China.1932-620310.1371/journal.pone.0259774https://doaj.org/article/5ef73481052c4c828503bda41dce046d2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0259774https://doaj.org/toc/1932-6203The spatial and temporal characteristics of drought in Northeast China are investigated, using monthly meteorological data from 140 stations over the period 1970-2014. The study area was divided into three regions using hierarchical cluster analysis based on the precipitation and potential evapotranspiration data. The standardized precipitation evapotranspiration index (SPEI) was calculated for each station on 3-month and 12-month time scales. The Mann-Kendall (MK) trend test and Sen's slope method were applied to determine the trends for annual and seasonal SPEI time series. Periodic features of drought conditions in each sub-region and possible relationship with large-scale climate patterns were respectively identified using the continuous wavelet transform (CWT) and cross wavelet transform. The results show mitigations in spring and winter droughts and a significant increasing trend in autumn drought. On the annual scale, droughts became more severe and more intense in the western regions but were mitigated in the eastern region. CWT analysis showed that droughts in Northeast China occur predominantly in 14- to 42-month or 15- to 60-month cycles. Annual and seasonal droughts have 2- to 6-year cycles over the three defined regions. Cross wavelet analysis also shows that the statistically significant influence of large-scale climate patterns (the Southern Oscillation, the Atlantic Multidecadal Oscillation, the Arctic Oscillation, and the Polar-Eurasian Pattern) on drought in Northeast China is concentrated in a 16- to 50-month period, possibly causing drought variability in the different regions. The Southern Oscillation, Polar-Eurasia pattern, and Arctic Oscillation are significantly correlated with drought on decadal scales (around 120-month period). The findings of this study will provide valuable reference for regional drought mitigation and drought prediction.Yuan YueHaiFeng LiuXiuXiang MuMengSheng QinTingTing WangQi WangYaQiong YanPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 11, p e0259774 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yuan Yue HaiFeng Liu XiuXiang Mu MengSheng Qin TingTing Wang Qi Wang YaQiong Yan Spatial and temporal characteristics of drought and its correlation with climate indices in Northeast China.
description	The spatial and temporal characteristics of drought in Northeast China are investigated, using monthly meteorological data from 140 stations over the period 1970-2014. The study area was divided into three regions using hierarchical cluster analysis based on the precipitation and potential evapotranspiration data. The standardized precipitation evapotranspiration index (SPEI) was calculated for each station on 3-month and 12-month time scales. The Mann-Kendall (MK) trend test and Sen's slope method were applied to determine the trends for annual and seasonal SPEI time series. Periodic features of drought conditions in each sub-region and possible relationship with large-scale climate patterns were respectively identified using the continuous wavelet transform (CWT) and cross wavelet transform. The results show mitigations in spring and winter droughts and a significant increasing trend in autumn drought. On the annual scale, droughts became more severe and more intense in the western regions but were mitigated in the eastern region. CWT analysis showed that droughts in Northeast China occur predominantly in 14- to 42-month or 15- to 60-month cycles. Annual and seasonal droughts have 2- to 6-year cycles over the three defined regions. Cross wavelet analysis also shows that the statistically significant influence of large-scale climate patterns (the Southern Oscillation, the Atlantic Multidecadal Oscillation, the Arctic Oscillation, and the Polar-Eurasian Pattern) on drought in Northeast China is concentrated in a 16- to 50-month period, possibly causing drought variability in the different regions. The Southern Oscillation, Polar-Eurasia pattern, and Arctic Oscillation are significantly correlated with drought on decadal scales (around 120-month period). The findings of this study will provide valuable reference for regional drought mitigation and drought prediction.
format	article
author	Yuan Yue HaiFeng Liu XiuXiang Mu MengSheng Qin TingTing Wang Qi Wang YaQiong Yan
author_facet	Yuan Yue HaiFeng Liu XiuXiang Mu MengSheng Qin TingTing Wang Qi Wang YaQiong Yan
author_sort	Yuan Yue
title	Spatial and temporal characteristics of drought and its correlation with climate indices in Northeast China.
title_short	Spatial and temporal characteristics of drought and its correlation with climate indices in Northeast China.
title_full	Spatial and temporal characteristics of drought and its correlation with climate indices in Northeast China.
title_fullStr	Spatial and temporal characteristics of drought and its correlation with climate indices in Northeast China.
title_full_unstemmed	Spatial and temporal characteristics of drought and its correlation with climate indices in Northeast China.
title_sort	spatial and temporal characteristics of drought and its correlation with climate indices in northeast china.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/5ef73481052c4c828503bda41dce046d
work_keys_str_mv	AT yuanyue spatialandtemporalcharacteristicsofdroughtanditscorrelationwithclimateindicesinnortheastchina AT haifengliu spatialandtemporalcharacteristicsofdroughtanditscorrelationwithclimateindicesinnortheastchina AT xiuxiangmu spatialandtemporalcharacteristicsofdroughtanditscorrelationwithclimateindicesinnortheastchina AT mengshengqin spatialandtemporalcharacteristicsofdroughtanditscorrelationwithclimateindicesinnortheastchina AT tingtingwang spatialandtemporalcharacteristicsofdroughtanditscorrelationwithclimateindicesinnortheastchina AT qiwang spatialandtemporalcharacteristicsofdroughtanditscorrelationwithclimateindicesinnortheastchina AT yaqiongyan spatialandtemporalcharacteristicsofdroughtanditscorrelationwithclimateindicesinnortheastchina
_version_	1718374825150382080

Spatial and temporal characteristics of drought and its correlation with climate indices in Northeast China.

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