Evaluating Spatiotemporal Patterns and Trends of Drought in Japan Associated with Global Climatic Drivers
Drought disasters, such as water scarcity and wildfires, are serious natural disasters in Japan that are also affected by climate change. However, as drought generally has widespread impacts and the duration of drought can vary considerably, it is difficult to assess the spatiotemporal characteristi...
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ftcopernicus:oai:publications.copernicus.org:nhessd91853 2023-05-15T15:14:08+02:00 Evaluating Spatiotemporal Patterns and Trends of Drought in Japan Associated with Global Climatic Drivers Shi, Ke Touge, Yoshiya Kazama, So 2021-01-06 application/pdf https://doi.org/10.5194/nhess-2020-416 https://nhess.copernicus.org/preprints/nhess-2020-416/ eng eng doi:10.5194/nhess-2020-416 https://nhess.copernicus.org/preprints/nhess-2020-416/ eISSN: 1684-9981 Text 2021 ftcopernicus https://doi.org/10.5194/nhess-2020-416 2021-01-11T17:22:14Z Drought disasters, such as water scarcity and wildfires, are serious natural disasters in Japan that are also affected by climate change. However, as drought generally has widespread impacts and the duration of drought can vary considerably, it is difficult to assess the spatiotemporal characteristics and the climatic causes of drought. Therefore, to identify the drought homogeneous regions and understand climatic causes of regional drought over Japan, this study provides a spatiotemporal analysis for historical droughts patterns and teleconnections associated with global climatic drivers. The trends of meteorological elements, which are the basis of drought index calculation, was first assessed. Then, drought characterized by the Self-calibrating Palmer Drought Severity Index (scPDSI) was investigated. Trends and patterns of drought were identified through the trend-free pre-whitening Mann-Kendall test and distinct empirical orthogonal function. The continuous wavelet transform and cross wavelet transform together with wavelet coherence were utilized to depict the links between drought and global climatic drivers. The results are described as follows: (1) the trends of precipitation were insignificant. However, temperature and potential evapotranspiration increasing trends were detected over Japan; (2) the drought trend over Japan varied seasonally, increasing in spring and summer and decreasing in autumn and winter; (3) two major subregions of drought variability—the western Japan (W region) and most of the northernmost Japan near the Pacific (N region) were identified; (4) wildfires with large burned area were more likely to occur when the scPDSI was less than −1; and (5) the North Atlantic Index (NAOI) showed the strongest coherence connections with Distinguished Principle Components-1 among four climatic drivers. Additionally, Distinguished Principle Components-2 showed stronger coherence connections with NAOI and Arctic Oscillation Index. This study is the first to identify homogeneous regions with distinct drought characteristics over Japan and connect the drought in Japan with the global climatic drivers. Text Arctic Climate change North Atlantic Copernicus Publications: E-Journals Arctic Kendall ENVELOPE(-59.828,-59.828,-63.497,-63.497) Pacific |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Drought disasters, such as water scarcity and wildfires, are serious natural disasters in Japan that are also affected by climate change. However, as drought generally has widespread impacts and the duration of drought can vary considerably, it is difficult to assess the spatiotemporal characteristics and the climatic causes of drought. Therefore, to identify the drought homogeneous regions and understand climatic causes of regional drought over Japan, this study provides a spatiotemporal analysis for historical droughts patterns and teleconnections associated with global climatic drivers. The trends of meteorological elements, which are the basis of drought index calculation, was first assessed. Then, drought characterized by the Self-calibrating Palmer Drought Severity Index (scPDSI) was investigated. Trends and patterns of drought were identified through the trend-free pre-whitening Mann-Kendall test and distinct empirical orthogonal function. The continuous wavelet transform and cross wavelet transform together with wavelet coherence were utilized to depict the links between drought and global climatic drivers. The results are described as follows: (1) the trends of precipitation were insignificant. However, temperature and potential evapotranspiration increasing trends were detected over Japan; (2) the drought trend over Japan varied seasonally, increasing in spring and summer and decreasing in autumn and winter; (3) two major subregions of drought variability—the western Japan (W region) and most of the northernmost Japan near the Pacific (N region) were identified; (4) wildfires with large burned area were more likely to occur when the scPDSI was less than −1; and (5) the North Atlantic Index (NAOI) showed the strongest coherence connections with Distinguished Principle Components-1 among four climatic drivers. Additionally, Distinguished Principle Components-2 showed stronger coherence connections with NAOI and Arctic Oscillation Index. This study is the first to identify homogeneous regions with distinct drought characteristics over Japan and connect the drought in Japan with the global climatic drivers. |
format |
Text |
author |
Shi, Ke Touge, Yoshiya Kazama, So |
spellingShingle |
Shi, Ke Touge, Yoshiya Kazama, So Evaluating Spatiotemporal Patterns and Trends of Drought in Japan Associated with Global Climatic Drivers |
author_facet |
Shi, Ke Touge, Yoshiya Kazama, So |
author_sort |
Shi, Ke |
title |
Evaluating Spatiotemporal Patterns and Trends of Drought in Japan Associated with Global Climatic Drivers |
title_short |
Evaluating Spatiotemporal Patterns and Trends of Drought in Japan Associated with Global Climatic Drivers |
title_full |
Evaluating Spatiotemporal Patterns and Trends of Drought in Japan Associated with Global Climatic Drivers |
title_fullStr |
Evaluating Spatiotemporal Patterns and Trends of Drought in Japan Associated with Global Climatic Drivers |
title_full_unstemmed |
Evaluating Spatiotemporal Patterns and Trends of Drought in Japan Associated with Global Climatic Drivers |
title_sort |
evaluating spatiotemporal patterns and trends of drought in japan associated with global climatic drivers |
publishDate |
2021 |
url |
https://doi.org/10.5194/nhess-2020-416 https://nhess.copernicus.org/preprints/nhess-2020-416/ |
long_lat |
ENVELOPE(-59.828,-59.828,-63.497,-63.497) |
geographic |
Arctic Kendall Pacific |
geographic_facet |
Arctic Kendall Pacific |
genre |
Arctic Climate change North Atlantic |
genre_facet |
Arctic Climate change North Atlantic |
op_source |
eISSN: 1684-9981 |
op_relation |
doi:10.5194/nhess-2020-416 https://nhess.copernicus.org/preprints/nhess-2020-416/ |
op_doi |
https://doi.org/10.5194/nhess-2020-416 |
_version_ |
1766344631578001408 |