Spatiotemporal Variations of Drought and Their Teleconnections with Large-Scale Climate Indices over the Poyang Lake Basin, China

The intensity and frequency of droughts in Poyang Lake Basin have been increasing due to global warming. To properly manage water resources and mitigate drought disasters, it is important to understand the long-term characteristics of drought and its possible link with large-scale climate indices. B...

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Published in:Sustainability
Main Authors: Weilin Liu, Shengnan Zhu, Yipeng Huang, Yifan Wan, Bin Wu, Lina Liu
Format: Text
Language:English
Published: Multidisciplinary Digital Publishing Institute 2020
Subjects:
Online Access:https://doi.org/10.3390/su12093526
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author Weilin Liu
Shengnan Zhu
Yipeng Huang
Yifan Wan
Bin Wu
Lina Liu
author_facet Weilin Liu
Shengnan Zhu
Yipeng Huang
Yifan Wan
Bin Wu
Lina Liu
author_sort Weilin Liu
collection MDPI Open Access Publishing
container_issue 9
container_start_page 3526
container_title Sustainability
container_volume 12
description The intensity and frequency of droughts in Poyang Lake Basin have been increasing due to global warming. To properly manage water resources and mitigate drought disasters, it is important to understand the long-term characteristics of drought and its possible link with large-scale climate indices. Based on the monthly meteorological data of 41 meteorological stations in Poyang Lake Basin from 1958 to 2017, the spatiotemporal variations of drought were investigated using the standardized precipitation evapotranspiration index (SPEI). Ensemble empirical mode decomposition (EEMD) methods and the modified Mann–Kendall (MMK) trend test were used to explore the spatiotemporal characteristics and trends of drought. Furthermore, to reveal possible links between drought variations and large-scale climate indices in Poyang Lake Basin, the relationships between SPEI and large-scale climate indices, such as North Atlantic Oscillation (NAO), El Niño–Southern Oscillation (ENSO), Arctic Oscillation (AO), Indian Ocean Dipole (IOD) and Pacific Decadal Oscillation (PDO) were examined using cross-wavelet transform. The results showed that the SPEI in Poyang Lake Basin exhibited relatively stable quasi-periodic oscillation, with approximate quasi-3-year and quasi-6-year periods at the inter-annual scale and quasi-15-year and quasi-30-year periods at the inter-decadal scale from 1958 to 2017. Moreover, the Poyang Lake Basin experienced an insignificantly wetter trend as a whole at the annual and seasonal scales during the period of 1958–2017, except for spring, which had a drought trend. The special characteristics of the trend variations were markedly different in the basin. The areas in which drought was most likely to occur were mainly located in the Poyang Lake region, northwest and south of the basin, respectively. Furthermore, relationships between the drought and six climate indices showed that the drought exhibited a significant temporal correlation with five climate indices at restricted intervals, except for IOD. The ...
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Global warming
North Atlantic
North Atlantic oscillation
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Global warming
North Atlantic
North Atlantic oscillation
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spelling ftmdpi:oai:mdpi.com:/2071-1050/12/9/3526/ 2025-01-16T20:51:02+00:00 Spatiotemporal Variations of Drought and Their Teleconnections with Large-Scale Climate Indices over the Poyang Lake Basin, China Weilin Liu Shengnan Zhu Yipeng Huang Yifan Wan Bin Wu Lina Liu agris 2020-04-25 application/pdf https://doi.org/10.3390/su12093526 EN eng Multidisciplinary Digital Publishing Institute Environmental Sustainability and Applications https://dx.doi.org/10.3390/su12093526 https://creativecommons.org/licenses/by/4.0/ Sustainability; Volume 12; Issue 9; Pages: 3526 drought characteristics ensemble empirical mode decomposition (EEMD) standardized precipitation evapotranspiration index (SPEI) large-scale climate index cross-wavelet transform (XWT) Poyang Lake Basin Text 2020 ftmdpi https://doi.org/10.3390/su12093526 2023-07-31T23:25:24Z The intensity and frequency of droughts in Poyang Lake Basin have been increasing due to global warming. To properly manage water resources and mitigate drought disasters, it is important to understand the long-term characteristics of drought and its possible link with large-scale climate indices. Based on the monthly meteorological data of 41 meteorological stations in Poyang Lake Basin from 1958 to 2017, the spatiotemporal variations of drought were investigated using the standardized precipitation evapotranspiration index (SPEI). Ensemble empirical mode decomposition (EEMD) methods and the modified Mann–Kendall (MMK) trend test were used to explore the spatiotemporal characteristics and trends of drought. Furthermore, to reveal possible links between drought variations and large-scale climate indices in Poyang Lake Basin, the relationships between SPEI and large-scale climate indices, such as North Atlantic Oscillation (NAO), El Niño–Southern Oscillation (ENSO), Arctic Oscillation (AO), Indian Ocean Dipole (IOD) and Pacific Decadal Oscillation (PDO) were examined using cross-wavelet transform. The results showed that the SPEI in Poyang Lake Basin exhibited relatively stable quasi-periodic oscillation, with approximate quasi-3-year and quasi-6-year periods at the inter-annual scale and quasi-15-year and quasi-30-year periods at the inter-decadal scale from 1958 to 2017. Moreover, the Poyang Lake Basin experienced an insignificantly wetter trend as a whole at the annual and seasonal scales during the period of 1958–2017, except for spring, which had a drought trend. The special characteristics of the trend variations were markedly different in the basin. The areas in which drought was most likely to occur were mainly located in the Poyang Lake region, northwest and south of the basin, respectively. Furthermore, relationships between the drought and six climate indices showed that the drought exhibited a significant temporal correlation with five climate indices at restricted intervals, except for IOD. The ... Text Arctic Global warming North Atlantic North Atlantic oscillation MDPI Open Access Publishing Arctic Indian Kendall ENVELOPE(-59.828,-59.828,-63.497,-63.497) Pacific Sustainability 12 9 3526
spellingShingle drought characteristics
ensemble empirical mode decomposition (EEMD)
standardized precipitation evapotranspiration index (SPEI)
large-scale climate index
cross-wavelet transform (XWT)
Poyang Lake Basin
Weilin Liu
Shengnan Zhu
Yipeng Huang
Yifan Wan
Bin Wu
Lina Liu
Spatiotemporal Variations of Drought and Their Teleconnections with Large-Scale Climate Indices over the Poyang Lake Basin, China
title Spatiotemporal Variations of Drought and Their Teleconnections with Large-Scale Climate Indices over the Poyang Lake Basin, China
title_full Spatiotemporal Variations of Drought and Their Teleconnections with Large-Scale Climate Indices over the Poyang Lake Basin, China
title_fullStr Spatiotemporal Variations of Drought and Their Teleconnections with Large-Scale Climate Indices over the Poyang Lake Basin, China
title_full_unstemmed Spatiotemporal Variations of Drought and Their Teleconnections with Large-Scale Climate Indices over the Poyang Lake Basin, China
title_short Spatiotemporal Variations of Drought and Their Teleconnections with Large-Scale Climate Indices over the Poyang Lake Basin, China
title_sort spatiotemporal variations of drought and their teleconnections with large-scale climate indices over the poyang lake basin, china
topic drought characteristics
ensemble empirical mode decomposition (EEMD)
standardized precipitation evapotranspiration index (SPEI)
large-scale climate index
cross-wavelet transform (XWT)
Poyang Lake Basin
topic_facet drought characteristics
ensemble empirical mode decomposition (EEMD)
standardized precipitation evapotranspiration index (SPEI)
large-scale climate index
cross-wavelet transform (XWT)
Poyang Lake Basin
url https://doi.org/10.3390/su12093526