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See full article\/ Veure l’article complet: https:\/\/doi.org\/10.1016\/j.uclim.2021.100982<\/a><\/strong><\/p>\n <\/p>\n <\/p>\n English:<\/strong><\/p>\n Due to increased urbanization and global warming, cities are experiencing more heat wave (HW) events that cause extreme heat stress. To mitigate such effects, a better understanding of the impact of\u00a0urban morphology<\/a>\u00a0on the boundary layer development is needed. This study investigates the sensitivity of\u00a0mesoscale<\/a>\u00a0simulations using the\u00a0WRF<\/a>\u00a0model coupled with the building effect parameterization and the\u00a0building energy model<\/a>\u00a0(BEP-BEM) at a 1-km resolution to 1) soil moisture initializations; 2) the inclusion of site-specific urban morphology parameters; and 3) the\u00a0planetary boundary layer<\/a> (PBL) scheme. A HW episode that occurred in the metropolitan area of Barcelona serves as the case study. We find that the use of a high-resolution land data assimilation<\/a>\u00a0system (HRLDAS) to initialize soil properties results in larger temperature diurnal range, but it did not improve the performance of simulated temperatures compared to using low-resolution ERA5 data. The inclusion of site-specific urban parameters improved the representation of urban fractions, reducing the night-time\u00a0overprediction<\/a> of 2-m temperatures compared to using default urban parameters. Overall, the Bougeault-Lacarrere (BouLac) scheme represents the PBL-height noontime observations better than the Mellor-Yamada-Janjic (MYJ) scheme. This was related to a better representation of daytime near-surface temperatures by the BouLac scheme compared to the MYJ scheme.<\/p>\n Catal\u00e0:<\/strong><\/p>\n A causa de l’increment de les zones urbanitzades i l’escalfament global, les ciutats estan experimentant m\u00e9s esdeveniments d’onada de calor (HW) que causen estr\u00e8s t\u00e8rmic extrem. Per mitigar aquests efectes, es necessita una millor comprensi\u00f3 de l’impacte de la morfologia urbana en el desenvolupament de la capa l\u00edmit. Aquest estudi investiga la sensibilitat de simulacions mesoescalars utilitzant el model WRF juntament amb la “parametritzaci\u00f3 de l’efecte edifici” i el “model d’energia de construcci\u00f3” (BEP-BEM) a una resoluci\u00f3 d’1 km amb 1) inicialitzacions d’humitat del s\u00f2l; 2) la inclusi\u00f3 de par\u00e0metres de morfologia urbana espec\u00edfics del lloc; i 3) l’esquema de capa l\u00edmit planet\u00e0ria (PBL scheme). El cas d’estudi \u00e9s un episodi de HW que es va produir a l’\u00e0rea metropolitana de Barcelona. Trobem que l’\u00fas d’un sistema d’assimilaci\u00f3 de dades terrestres d’alta resoluci\u00f3 (HRLDAS) per inicialitzar les propietats del s\u00f2l resulta en un rang di\u00fcrn de temperatura m\u00e9s gran, per\u00f2 no va millorar el rendiment de les temperatures simulades en comparaci\u00f3 amb l’\u00fas de dades ERA5 de baixa resoluci\u00f3. La inclusi\u00f3 de par\u00e0metres urbans espec\u00edfics del lloc va millorar la representaci\u00f3 de fraccions urbanes, reduint la sobreestimaci\u00f3 nocturna de temperatures a 2 metres en comparaci\u00f3 amb l’\u00fas de par\u00e0metres urbans predeterminats. En general, l’esquema Bougeault-Lacarrere (BouLac) representa les observacions de l’al\u00e7ada de la PBL al migdia millor que l’esquema Mellor-Yamada-Janjic (MYJ). Aix\u00f2 est\u00e0 relacionat amb una millor representaci\u00f3 de les temperatures di\u00fcrnes properes a la superf\u00edcie\u00a0 per l’esquema BouLac en comparaci\u00f3 amb l’esquema MYJ.<\/p>\n <\/p>\n Figure<\/strong>: Temperature analysis for the performance of\u00a0WRF<\/a>\u00a0simulations.\u00a0Root mean square error<\/a>\u00a0(RMSE) (top), Mean bias (MB) (middle) and\u00a0correlation coefficient<\/a>\u00a0(R) (bottom) at daytime (left) and night-time (right) for each simulation and LULC group of stations.<\/p>\n","protected":false},"excerpt":{"rendered":" Title: Sensitivity study of PBL schemes and soil initialization using the WRF-BEP-BEM model over a Mediterranean coastal city \/ <\/p>\n Due to increased urbanization and global warming, cities are experiencing more heat wave (HW) events that cause extreme heat stress. To mitigate such effects, a better understanding of the impact of\u00a0urban morphology\u00a0on the boundary layer development is needed. <\/p>\n","protected":false},"author":3153,"featured_media":1431,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[16,96,97,98,99,100,101,102,10,103,62],"class_list":["post-1418","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general","tag-barcelona","tag-bep-bem","tag-boulac","tag-era5","tag-global-warming","tag-heat-wave","tag-myj","tag-pbl","tag-urbag","tag-urban","tag-wrf"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts\/1418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/users\/3153"}],"replies":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/comments?post=1418"}],"version-history":[{"count":0,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts\/1418\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/media\/1431"}],"wp:attachment":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/media?parent=1418"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/categories?post=1418"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/tags?post=1418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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