Two different propagation patterns of spatiotemporally contiguous heatwaves in China
Abstract Heatwaves detrimentally affect human health and ecosystems. While previous studies focused on either temporal changes or spatial extents of heatwaves, their spatiotemporal contiguity and propagation patterns are unclear. Here, we investigate the climatology, long-term trends, and interannua...
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Online Access: | https://doi.org/10.1038/s41612-022-00313-y https://doaj.org/article/78cf40ba51414c5fa7f26b8be0011831 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:78cf40ba51414c5fa7f26b8be0011831 2023-05-15T17:33:33+02:00 Two different propagation patterns of spatiotemporally contiguous heatwaves in China Ming Luo Xiaoyu Wang Na Dong Wei Zhang Jing Li Sijia Wu Guicai Ning Lan Dai Zhen Liu 2022-11-01 https://doi.org/10.1038/s41612-022-00313-y https://doaj.org/article/78cf40ba51414c5fa7f26b8be0011831 en eng Nature Portfolio doi:10.1038/s41612-022-00313-y 2397-3722 https://doaj.org/article/78cf40ba51414c5fa7f26b8be0011831 undefined npj Climate and Atmospheric Science, Vol 5, Iss 1, Pp 1-11 (2022) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.1038/s41612-022-00313-y 2023-01-22T19:12:04Z Abstract Heatwaves detrimentally affect human health and ecosystems. While previous studies focused on either temporal changes or spatial extents of heatwaves, their spatiotemporal contiguity and propagation patterns are unclear. Here, we investigate the climatology, long-term trends, and interannual variations of spatiotemporally contiguous heatwaves across China during 1961 to 2018. Two distinct propagation patterns are identified by introducing a spatiotemporally contiguous events tracking (SCET) method and the k-means clustering. Type 1 contiguous heatwaves mostly generate over eastern China and move southwestward at shorter distances, while Type 2 heatwaves generally initiate over western China and move southeastward at longer distances, with stronger intensity, longer lifetime, and larger coverage. Since the 1960s, both types exhibit significant increases in frequency, intensity, coverage, lifetime, and traveling distances, with relatively larger magnitudes for Type 2, but significant decreases in moving speed only appear for Type 1. On interannual timescale, preceding winter El Niño prolongs the duration and slows down the moving speed of Type 1 through the western North Pacific subtropical high. Type 2 contiguous heatwaves are intensified by the negative spring North Atlantic Oscillation via the upper-atmospheric Rossby wave train. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Unknown Pacific npj Climate and Atmospheric Science 5 1 |
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envir geo Ming Luo Xiaoyu Wang Na Dong Wei Zhang Jing Li Sijia Wu Guicai Ning Lan Dai Zhen Liu Two different propagation patterns of spatiotemporally contiguous heatwaves in China |
topic_facet |
envir geo |
description |
Abstract Heatwaves detrimentally affect human health and ecosystems. While previous studies focused on either temporal changes or spatial extents of heatwaves, their spatiotemporal contiguity and propagation patterns are unclear. Here, we investigate the climatology, long-term trends, and interannual variations of spatiotemporally contiguous heatwaves across China during 1961 to 2018. Two distinct propagation patterns are identified by introducing a spatiotemporally contiguous events tracking (SCET) method and the k-means clustering. Type 1 contiguous heatwaves mostly generate over eastern China and move southwestward at shorter distances, while Type 2 heatwaves generally initiate over western China and move southeastward at longer distances, with stronger intensity, longer lifetime, and larger coverage. Since the 1960s, both types exhibit significant increases in frequency, intensity, coverage, lifetime, and traveling distances, with relatively larger magnitudes for Type 2, but significant decreases in moving speed only appear for Type 1. On interannual timescale, preceding winter El Niño prolongs the duration and slows down the moving speed of Type 1 through the western North Pacific subtropical high. Type 2 contiguous heatwaves are intensified by the negative spring North Atlantic Oscillation via the upper-atmospheric Rossby wave train. |
format |
Article in Journal/Newspaper |
author |
Ming Luo Xiaoyu Wang Na Dong Wei Zhang Jing Li Sijia Wu Guicai Ning Lan Dai Zhen Liu |
author_facet |
Ming Luo Xiaoyu Wang Na Dong Wei Zhang Jing Li Sijia Wu Guicai Ning Lan Dai Zhen Liu |
author_sort |
Ming Luo |
title |
Two different propagation patterns of spatiotemporally contiguous heatwaves in China |
title_short |
Two different propagation patterns of spatiotemporally contiguous heatwaves in China |
title_full |
Two different propagation patterns of spatiotemporally contiguous heatwaves in China |
title_fullStr |
Two different propagation patterns of spatiotemporally contiguous heatwaves in China |
title_full_unstemmed |
Two different propagation patterns of spatiotemporally contiguous heatwaves in China |
title_sort |
two different propagation patterns of spatiotemporally contiguous heatwaves in china |
publisher |
Nature Portfolio |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41612-022-00313-y https://doaj.org/article/78cf40ba51414c5fa7f26b8be0011831 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
npj Climate and Atmospheric Science, Vol 5, Iss 1, Pp 1-11 (2022) |
op_relation |
doi:10.1038/s41612-022-00313-y 2397-3722 https://doaj.org/article/78cf40ba51414c5fa7f26b8be0011831 |
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op_doi |
https://doi.org/10.1038/s41612-022-00313-y |
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npj Climate and Atmospheric Science |
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5 |
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1 |
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1766132104439005184 |