Rapid urbanization induced daily maximum wind speed decline in metropolitan areas: A case study in the Yangtze River Delta (China)

Wind extremes cause many environmental and natural hazard related problems globally, particularly in heavily populated metropolitan areas. However, the underlying causes of maximum wind speed variability in urbanized regions remain largely unknown. Here, we investigated how rapid urbanization in the Yangtze River Delta (YRD), China, impacted daily maximum wind speed (DMWS) between 1990 and 2015, based on near-surface (10 m height) DMWS observations, reanalysis datasets, and night-time lighting data (a proxy for urbanization). The station observation shows that annual DMWS in the YRD significantly (p < 0.05) declined during 1990-2015, by -0.209 m s(-1) decade(-1), while slightly (p > 0.1) positive trends were found in NCEP-NCAR1 (+0.048 m s(-1) decade(-1)) and ERA5 (+0.027 m s(-1) decade(-1)). An increasing divergence between the reanalysis output and the station observation since 2005 was found, and those stations located in areas with high rates of urbanization show the strongest negative annual DMWS trend, implying the key role of urbanization in weakening DMWS. This finding is supported by sensitivity experiments conducted using a regional climate model (RegCM4) forced with both 1990 and 2015 land-use and land-cover (LULC) data, where the simulated DMWS using the 2015 LULC data was lower than that simulated using the 1990 LULC data.

NATURVETENSKAP Geovetenskap och miljövetenskap Klimatforskning hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Climate Research hsv//eng
Daily maximum wind speed
Trend
Urbanization
Regional climate model
Yangtze River Delta
land-use
northern china
cover change
surface
trends
homogenization
model
variability
simulation
portugal
Environmental Sciences & Ecology
Meteorology & Atmospheric Sciences

Azorin-Molina, C. (författare)
Wang, X. J. (författare)
Chen, Deliang,1961Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences(Swepub:gu)xchede (författare)
McVicar, T. R. (författare)
Guijarro, J. A. (författare)
Chappell, A. (författare)
Kaiqiang, DengGothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences (författare)
Minola, L. (författare)
Kong, F. (författare)
Wang, S. (författare)
Shi, P. J. (författare)
Göteborgs universitetInstitutionen för geovetenskaper (creator_code:org_t)

Av författaren/redakt...: Zhang, G. F.; Azorin-Molina, C ...; Wang, X. J.; Chen, Deliang, 1 ...; McVicar, T. R.; Guijarro, J. A.; visa fler...; Chappell, A.; Kaiqiang, Deng; Minola, L.; Kong, F.; Wang, S.; Shi, P. J.; visa färre...

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