期刊
ATMOSPHERIC RESEARCH
卷 247, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.atmosres.2020.105152
关键词
Warming slowdown; Heatwaves; Joint probability distribution; Joint return period; China
资金
- National Key R&D Program of China [2018YFA0605603]
- Third Batch of Ningxia Youth Talents Supporting Program [TJGC2018043]
- Ningxia Youth Top Talent Training Project
- Natural Science Foundation of China (NSFC) [41575003]
The study revealed that with global warming, the duration and severity of heatwaves in China have increased, especially with the joint return periods of 50-100 years, leading to a strengthening of heatwave severity.
Heatwaves are multi-day periods of extremely high-temperature weather relative to a region's average conditions and are among the deadliest natural disasters. This study was designed to evaluate changes in the characteristics of heatwaves during the periods of warming acceleration versus warming slowdown using the multivariate joint probability distributions of heatwave duration and severity. The results revealed that (1) From the warming acceleration period (1961-1997) to the warming slowdown period (1998-2017), the return levels of heatwave duration increased by < 1.0 d as the return period increased. As the return period lengthened, the return level of heatwave severity rose as well; (2) The joint occurrence probability of heatwaves with both variables exceeding the 20-yr, 50-yr, and 100-yr return levels exhibited relative increases of 3%, 8%, and 16% across China, respectively. There were greater than the joint probability of heatwaves with only 1 variable exceeding the return levels; (3) The number of heatwaves with both duration and severity exceeding the 50-yr joint return period increased in China, and this increase was dominated by heatwaves with joint return periods of 50-100 years, leading to a strengthening of heatwave severity.
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