دورية أكاديمية
Escalating hot-dry extremes in Southwest China Karst
| العنوان: | Escalating hot-dry extremes in Southwest China Karst |
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| المؤلفون: | Shilei Peng, Dong Yang, Qingqing Dai, Xuezhang Li, Zhenwei Li, Binghui He, Xianli Xu |
| المصدر: | Journal of Hydrology: Regional Studies, Vol 53, Iss , Pp 101838- (2024) |
| بيانات النشر: | Elsevier, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Physical geography LCC:Geology |
| مصطلحات موضوعية: | Southwest China, Hot-dry extremes, Compound events, Climatic indices, Karst landscapes, Physical geography, GB3-5030, Geology, QE1-996.5 |
| الوصف: | Study region: Southwestern China of Hubei, Hunan, Guangxi, Guangdong, Yunnan, Guizhou, Sichuan, and Chongqing. Study focus: Compound hot-dry extreme events (CHDEs) are escalating disproportionately worldwide, posing significant challenges across various sectors. Yet, their driving mechanisms and characteristics at a regional scale remain largely uncertain. This study used a copula-based approach to construct the daily Standardized Compound Hot-Dry Index (SCHDI) to discern the intensifying trends of hot-dry extremes from 1963 to 2022, especially under different karst landscapes in Southwestern China. New hydrological insights for the region: SCHDI variations show an escalation of hot-dry conditions across most areas, with a notable increase in extreme hot, dry, and hot-dry events. There was a consistent increase in the frequency, duration, severity, and intensity of CHDEs, with larger magnitudes observed in non-karst areas. However, karst regions exhibited a higher escalation rate in intensity, especially over the most recent three decades. Land areas affected by less severe CHDEs (e.g., abnormal: −0.31%/year) show decreasing trends over 1993–2022, while the most extreme category (e.g., extreme: 0.34%/year) has increased. The areas affected by CHDEs showed a greater increase in trend slope compared to hot or dry events alone. Additionally, these trends are further influenced by large-scale circulation patterns. Our study highlights the role of karst landscapes in escalating hot-dry extremes in Southwestern China Karst. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2214-5818 |
| العلاقة: | http://www.sciencedirect.com/science/article/pii/S2214581824001861Test; https://doaj.org/toc/2214-5818Test |
| DOI: | 10.1016/j.ejrh.2024.101838 |
| الوصول الحر: | https://doaj.org/article/fc5c096d545b40d3a177c4ef98eee7f6Test |
| رقم الانضمام: | edsdoj.fc5c096d545b40d3a177c4ef98eee7f6 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 22145818 |
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| DOI: | 10.1016/j.ejrh.2024.101838 |