Urban intensification of convective rainfall over the Singapore – Johor Bahru region

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dc.contributor.authorSimón-Moral, Andres
dc.contributor.authorDipankar, Anurag
dc.contributor.authorDoan, Quang Van
dc.contributor.authorSanchez, Claudio
dc.contributor.authorRoth, Matthias
dc.contributor.authorBecker, Erik
dc.contributor.authorHuang, Xiang Yu
dc.contributor.authorSimón‐Moral, Andres
dc.contributor.institutionCALIDAD Y CONFORT AMBIENTAL
dc.date.issued2021-10-01
dc.descriptionPublisher Copyright: © 2021 Royal Meteorological Society.
dc.description.abstractSimulations of five November months (2010–2014) using the urban version of the numerical weather prediction system of the Meteorological Service Singapore (uSINGV) are used to analyse the urban effect on convective precipitation over Singapore and Johor Bahru (Malaysia). The model is able to closely predict locations where rainfall peaks occur, but rainfall totals are overestimated compared to radar data. The temporal variability of rainfall in the region shows that urban areas increase the frequency and severity of rainfall events and that such impact increases with the rainfall intensity. Results show that low-level moisture advection is enhanced in this coastal conurbation as a result of the strengthening of wind convergence. The latter is likely caused by increasing sea-breeze strength due to lower surface pressure over the urban area, and higher urban surface roughness, respectively. As a consequence, more precipitable water is available in the region, enhancing convection and increasing the probability of heavy rainfall over the centre and north of Singapore island and Johor Bahru. Stronger convection further increases moisture advection from the vicinity. By studying the temporal variability and the spatial distribution of rainfall events, the present study provides new insights on the urban impact on heavy rainfall in tropical areas. The conclusions are only valid for the November inter-monsoon period, when local forcing, rather than large-scale influences, dominates rainfall generation.en
dc.description.sponsorshipThis work has been funded by the National Environmental Agency (NEA) of Singapore through a Research Collaborative Agreement (R‐109‐000‐338‐236‐490) with the National University of Singapore (NUS). The authors would like to thank Prasanna Venkatraman for supplying the boundary conditions driving the uSINGV simulations.
dc.description.statusPeer reviewed
dc.format.extent16
dc.identifier.citationSimón-Moral , A , Dipankar , A , Doan , Q V , Sanchez , C , Roth , M , Becker , E , Huang , X Y & Simón‐Moral , A 2021 , ' Urban intensification of convective rainfall over the Singapore – Johor Bahru region ' , Quarterly Journal of the Royal Meteorological Society , vol. 147 , no. 740 , pp. 3665-3680 . https://doi.org/10.1002/qj.4147
dc.identifier.doi10.1002/qj.4147
dc.identifier.issn0035-9009
dc.identifier.otherresearchoutputwizard: 11556/1262
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85113314816&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofQuarterly Journal of the Royal Meteorological Society
dc.relation.projectIDNational University of Singapore, NUS
dc.relation.projectIDNational Environment Agency - Singapore, NEA, R‐109‐000‐338‐236‐490
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject.keywords3. Physical phenomenon
dc.subject.keywordsconvection
dc.subject.keywordsSingapore
dc.subject.keywordstropical climate
dc.subject.keywordsurban climate modelling
dc.subject.keywordsurban rainfall
dc.subject.keywordsPhysical phenomenon
dc.subject.keywordsPhysical phenomenon
dc.subject.keywordsConvection
dc.subject.keywordsSingapore
dc.subject.keywordsTropical climate
dc.subject.keywordsUrban climate modelling
dc.subject.keywordsUrban rainfall
dc.subject.keywordsAtmospheric Science
dc.subject.keywordsSDG 17 - Partnerships for the Goals
dc.subject.keywordsFunding Info
dc.subject.keywordsNational Environment Agency - Singapore, R-109-000-338 236-490
dc.subject.keywordsNational Environment Agency - Singapore, R-109-000-338 236-490
dc.titleUrban intensification of convective rainfall over the Singapore – Johor Bahru regionen
dc.typejournal article
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