Disagreement in Detected Heatwave Trends Resulting From Diagnostic Methods
Abstract Heatwaves pose increased risk to ecosystem and society. Advanced event‐based detection methods offer novel insights into the spatiotemporal dynamics of heatwaves. However, robust assessments of heatwave trends remain challenging due to the sensitivity of results to parameter selection, incl...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-03-01
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| Series: | Geophysical Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2024GL114398 |
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| _version_ | 1850204198867566592 |
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| author | Boyuan Zhang Yongli He Zhanbo Wang Bo Huang Yongkun Xie Xiaodan Guan Jianping Huang |
| author_facet | Boyuan Zhang Yongli He Zhanbo Wang Bo Huang Yongkun Xie Xiaodan Guan Jianping Huang |
| author_sort | Boyuan Zhang |
| collection | DOAJ |
| description | Abstract Heatwaves pose increased risk to ecosystem and society. Advanced event‐based detection methods offer novel insights into the spatiotemporal dynamics of heatwaves. However, robust assessments of heatwave trends remain challenging due to the sensitivity of results to parameter selection, including connected structure, area threshold, and overlap ratio. Here, we employed 3‐dimensional connected detection algorithm (3DCDA) to explore the dependency of heatwave identifications on various parameter combinations. The results indicate that heatwave metrics are sensitive to 3DCDA parameters, with the appropriate combination for large‐scale heatwaves being overlap ratio of 40%–50%, area threshold of 106 km2, and 10‐connected structure. Based on this configuration, we discovered significant increasing trends in heatwave frequency, projection area and total magnitude, while observed a decrease in maximum intensity and area mean intensity both annually and during summer. These findings highlight the critical importance of parameter selection in 3DCDA for robust analysis of heatwaves and other extreme events. |
| format | Article |
| id | doaj-art-82dfcd39d17c4feca6c4225706e64ebc |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-82dfcd39d17c4feca6c4225706e64ebc2025-08-20T02:11:21ZengWileyGeophysical Research Letters0094-82761944-80072025-03-01526n/an/a10.1029/2024GL114398Disagreement in Detected Heatwave Trends Resulting From Diagnostic MethodsBoyuan Zhang0Yongli He1Zhanbo Wang2Bo Huang3Yongkun Xie4Xiaodan Guan5Jianping Huang6Key Laboratory for Semi‐Arid Climate Change of the Ministry of Education School of Atmospheric Sciences Lanzhou University Lanzhou ChinaKey Laboratory for Semi‐Arid Climate Change of the Ministry of Education School of Atmospheric Sciences Lanzhou University Lanzhou ChinaKey Laboratory for Semi‐Arid Climate Change of the Ministry of Education School of Atmospheric Sciences Lanzhou University Lanzhou ChinaKey Laboratory for Semi‐Arid Climate Change of the Ministry of Education School of Atmospheric Sciences Lanzhou University Lanzhou ChinaCollaborative Innovation Center for Western Ecological Safety Lanzhou ChinaKey Laboratory for Semi‐Arid Climate Change of the Ministry of Education School of Atmospheric Sciences Lanzhou University Lanzhou ChinaKey Laboratory for Semi‐Arid Climate Change of the Ministry of Education School of Atmospheric Sciences Lanzhou University Lanzhou ChinaAbstract Heatwaves pose increased risk to ecosystem and society. Advanced event‐based detection methods offer novel insights into the spatiotemporal dynamics of heatwaves. However, robust assessments of heatwave trends remain challenging due to the sensitivity of results to parameter selection, including connected structure, area threshold, and overlap ratio. Here, we employed 3‐dimensional connected detection algorithm (3DCDA) to explore the dependency of heatwave identifications on various parameter combinations. The results indicate that heatwave metrics are sensitive to 3DCDA parameters, with the appropriate combination for large‐scale heatwaves being overlap ratio of 40%–50%, area threshold of 106 km2, and 10‐connected structure. Based on this configuration, we discovered significant increasing trends in heatwave frequency, projection area and total magnitude, while observed a decrease in maximum intensity and area mean intensity both annually and during summer. These findings highlight the critical importance of parameter selection in 3DCDA for robust analysis of heatwaves and other extreme events.https://doi.org/10.1029/2024GL114398heatwave |
| spellingShingle | Boyuan Zhang Yongli He Zhanbo Wang Bo Huang Yongkun Xie Xiaodan Guan Jianping Huang Disagreement in Detected Heatwave Trends Resulting From Diagnostic Methods Geophysical Research Letters heatwave |
| title | Disagreement in Detected Heatwave Trends Resulting From Diagnostic Methods |
| title_full | Disagreement in Detected Heatwave Trends Resulting From Diagnostic Methods |
| title_fullStr | Disagreement in Detected Heatwave Trends Resulting From Diagnostic Methods |
| title_full_unstemmed | Disagreement in Detected Heatwave Trends Resulting From Diagnostic Methods |
| title_short | Disagreement in Detected Heatwave Trends Resulting From Diagnostic Methods |
| title_sort | disagreement in detected heatwave trends resulting from diagnostic methods |
| topic | heatwave |
| url | https://doi.org/10.1029/2024GL114398 |
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