Journal
JOURNAL OF CLIMATE
Volume 36, Issue 2, Pages 693-709Publisher
AMER METEOROLOGICAL SOC
DOI: 10.1175/JCLI-D-22-0223.1
Keywords
Extreme events; Climate change; Urban meteorology
Categories
Ask authors/readers for more resources
Moist heatwaves can intensify urban heavy precipitation events, especially in the Yangtze River delta region. In recent years, there has been an increase in the frequency and intensity of heavy precipitation events caused by moist heatwaves in the summer season. Urbanization has further exacerbated this trend.
Heavy precipitation (HP) events can be preceded by moist heatwaves (HWs, L., hot and humid weather), and both can be intensified by urbanization. However, the effect of moist HW on increasing urban HP remains unknown. Baked on statistical analyses of daily weather observations and ERAS reanalysis data, we herein investigate the effect of mdist HWs on urban intensified HP by dividing summer HP events into NoHW and HW preceded events in the Yangtze River delta (YRD) urban agglomeration of China. During the period 1961-2019, the YRD has experienced more frequent, longer lasting, and stronger intense HP events in the summer season (ie., Jung August), and urbanization has contributed to these increases (by 22.66% 37.50%). In contrast, urban effects on HP are almost absent if we remove HW preceded HP events from all HP events. Our results show that urbanization induced increases in HP are associated with, and magnified by moist HWs in urban areas of the YRD region. Moist HWs are conducive to an unstable atmosphere and stormy weather, and they also enhance urban heat island intensity, driving increases in HP over urban areas.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available