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Article: Impacts of Anthropogenic Heat Flux and Urban Land-Use Change on Frontal Rainfall near Coastal Regions: A Case Study of a Rainstorm over the Pearl River Delta, South China

TitleImpacts of Anthropogenic Heat Flux and Urban Land-Use Change on Frontal Rainfall near Coastal Regions: A Case Study of a Rainstorm over the Pearl River Delta, South China
Authors
KeywordsAnthropogenic heat flux
Coastal regions
Convective clouds
Pearl River delta
Rainfall intensity
Issue Date2020
PublisherAmerican Meteorological Society. The Journal's web site is located at http://www.ametsoc.org/ams
Citation
Journal of Applied Meteorology and Climatology, 2020, v. 59 n. 3, p. 363-379 How to Cite?
AbstractThis study investigated heavy frontal rainfall that occurred on 13–14 October 2011 over the Pearl River Delta (PRD) in China. The frontal rainstorm was simulated using the WRF-ARW Model (version 3.3), which included its urban canopy model. Although the model-simulated convection occurred 2 h early and the second precipitation peak was underestimated, the model represented the formation, development, and extinction of the frontal rainfall and captured the distribution of the peak value. In addition, the averaged value of 49.7 W m−2 was taken as the anthropogenic heat flux (AHF) of the PRD, and two land-use datasets were adopted: one for 1992 and the other for 2011. The simulation revealed that AHF and urban land-use change (ULUC) increased the total rainfall over the PRD by 6.3% and 7.4% and increased the maximum hourly rainfall intensity by 24.6% and 21.2%, respectively. Furthermore, to elucidate the mechanism of AHF and ULUC influence, the rainstorm structure, low-level jet (LLJ), and CAPE of the rainfall event were analyzed. It was found that AHF and ULUC enhanced two strong southward LLJs located over the urban areas, which carried abundant water vapor to the PRD and generated additional upper-level CAPE. This not only sustained steady ascent of the air, but it also created conditions favorable for downward motion, resulting in large persistent convective clouds and heavy frontal rainfall.
Persistent Identifierhttp://hdl.handle.net/10722/290884
ISSN
2023 Impact Factor: 2.6
2023 SCImago Journal Rankings: 1.068
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWen, J-
dc.contributor.authorChen, J-
dc.contributor.authorLin, W-
dc.contributor.authorJiang, B-
dc.contributor.authorXu, S-
dc.contributor.authorLan, J-
dc.date.accessioned2020-11-02T05:48:28Z-
dc.date.available2020-11-02T05:48:28Z-
dc.date.issued2020-
dc.identifier.citationJournal of Applied Meteorology and Climatology, 2020, v. 59 n. 3, p. 363-379-
dc.identifier.issn1558-8424-
dc.identifier.urihttp://hdl.handle.net/10722/290884-
dc.description.abstractThis study investigated heavy frontal rainfall that occurred on 13–14 October 2011 over the Pearl River Delta (PRD) in China. The frontal rainstorm was simulated using the WRF-ARW Model (version 3.3), which included its urban canopy model. Although the model-simulated convection occurred 2 h early and the second precipitation peak was underestimated, the model represented the formation, development, and extinction of the frontal rainfall and captured the distribution of the peak value. In addition, the averaged value of 49.7 W m−2 was taken as the anthropogenic heat flux (AHF) of the PRD, and two land-use datasets were adopted: one for 1992 and the other for 2011. The simulation revealed that AHF and urban land-use change (ULUC) increased the total rainfall over the PRD by 6.3% and 7.4% and increased the maximum hourly rainfall intensity by 24.6% and 21.2%, respectively. Furthermore, to elucidate the mechanism of AHF and ULUC influence, the rainstorm structure, low-level jet (LLJ), and CAPE of the rainfall event were analyzed. It was found that AHF and ULUC enhanced two strong southward LLJs located over the urban areas, which carried abundant water vapor to the PRD and generated additional upper-level CAPE. This not only sustained steady ascent of the air, but it also created conditions favorable for downward motion, resulting in large persistent convective clouds and heavy frontal rainfall.-
dc.languageeng-
dc.publisherAmerican Meteorological Society. The Journal's web site is located at http://www.ametsoc.org/ams-
dc.relation.ispartofJournal of Applied Meteorology and Climatology-
dc.rightsJournal of Applied Meteorology and Climatology. Copyright © American Meteorological Society.-
dc.rights© Copyright [2020] American Meteorological Society (AMS).-
dc.subjectAnthropogenic heat flux-
dc.subjectCoastal regions-
dc.subjectConvective clouds-
dc.subjectPearl River delta-
dc.subjectRainfall intensity-
dc.titleImpacts of Anthropogenic Heat Flux and Urban Land-Use Change on Frontal Rainfall near Coastal Regions: A Case Study of a Rainstorm over the Pearl River Delta, South China-
dc.typeArticle-
dc.identifier.emailChen, J: jichen@hku.hk-
dc.identifier.authorityChen, J=rp00098-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1175/JAMC-D-18-0296.1-
dc.identifier.scopuseid_2-s2.0-85082987717-
dc.identifier.hkuros318450-
dc.identifier.volume59-
dc.identifier.issue3-
dc.identifier.spage363-
dc.identifier.epage379-
dc.identifier.isiWOS:000522402000002-
dc.publisher.placeUnited States-
dc.identifier.issnl1558-8424-

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