气候变化领域集成服务门户(CCPortal): Dimming in the pearl river delta of China and the major influencing factors

CCPortal

DOI	10.3354/CR01626
	Dimming in the pearl river delta of China and the major influencing factors
	Liao Y.; Wang Z.; Xiong J.; Lai C.
发表日期	2021
ISSN	0936-577X
卷号	82
英文摘要	Sunshine duration (SD) has recently received a great deal of attention as it relates to climatic research under global climate change. Here, we explored the spatiotemporal variability of SD in the Pearl River Delta (PRD) in mainland China during 1960-2018. A novel equation was proposed to assess the relative influence of 5 climatic variables on variability in SD based on random forest (RF) analysis. The dominant variables, their temporal evolution driving SD, and their spatial distribution are discussed. Results showed that SD in the PRD varied significantly, both at a temporal and spatial scale. At the spatial scale, SD decreased gradually from the southeast to the northwest; in most areas, SD exhibited a downward trend. Temporally, annual SD decreased significantly at a rate of 57.01 h decade-1 during 1960-2018 (p < 0.01), suggesting a continuous dimming; an abrupt change occurred in 1981 with a main oscillation period of 3.0 yr. The annual mean SD showed a positive correlation with wind speed (WS) and a negative correlation with the other 4 climatic variables. Precipitation was determined to be the most influential variable, with a relative influence rate of 34.46%. The relative influence rates of the 5 examined variables changed over time, and their spatial distribution demonstrated significant diversity across different regions. Aerosols were found to be a factor driving SD in the PRD, but could not completely explain the change in SD in recent years. These findings provide a reference for studying the spatiotemporal variability of SD and detecting its influencing factors in highly urbanized areas. © 2021 Inter-Research. All rights reserved.
英文关键词	Climate change; Pearl river delta resale; Random forest; Spatiotemporal variation; Sunshine duration
来源期刊	Climate Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183808
作者单位	School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510641, China; State Key Lab of Subtropical Building Science, South China University of Technology, Guangzhou, 510641, China
推荐引用方式 GB/T 7714	Liao Y.,Wang Z.,Xiong J.,et al. Dimming in the pearl river delta of China and the major influencing factors[J],2021,82.
APA	Liao Y.,Wang Z.,Xiong J.,&Lai C..(2021).Dimming in the pearl river delta of China and the major influencing factors.Climate Research,82.
MLA	Liao Y.,et al."Dimming in the pearl river delta of China and the major influencing factors".Climate Research 82(2021).