[{"volume":46,"scopus_import":"1","type":"journal_article","author":[{"last_name":"Chiu","first_name":"Clinton T.F.","full_name":"Chiu, Clinton T.F."},{"full_name":"Wang, Kai","first_name":"Kai","last_name":"Wang"},{"last_name":"Paschalis","full_name":"Paschalis, Athanasios","first_name":"Athanasios"},{"last_name":"Erfani","full_name":"Erfani, Tohid","first_name":"Tohid"},{"full_name":"Peleg, Nadav","first_name":"Nadav","last_name":"Peleg"},{"id":"cf8e546b-a9b0-11f0-a43b-aa89ed1b56d6","last_name":"Fatichi","first_name":"Simone","full_name":"Fatichi, Simone"},{"full_name":"Theeuwes, Natalie","first_name":"Natalie","last_name":"Theeuwes"},{"first_name":"Gabriele","full_name":"Manoli, Gabriele","last_name":"Manoli"}],"date_updated":"2026-08-06T14:03:31Z","year":"2022","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1016/j.uclim.2022.101346"}],"extern":"1","article_processing_charge":"No","publication":"Urban Climate","OA_place":"publisher","date_published":"2022-12-01T00:00:00Z","quality_controlled":"1","abstract":[{"lang":"eng","text":"It is well known that cities increase air and surface temperatures compared to their rural surroundings, the so-called urban heat island (UHI) effect. However, the associated changes in atmospheric humidity (also known as urban dry island, UDI) and convection triggering remain largely unexplored and it is still unclear how urban modifications of the surface energy budget Influence the diurnal evolution of temperature and humidity in the Atmospheric Boundary Layer\r\n(ABL) and ultimately control the initiation of convective clouds.\r\nHere we quantify the impact of different urban settings and free atmospheric conditions on\r\nUHI, UDI, and convection triggers by means of a zero-order model of the ABL. Specifically, we\r\nderive an approximate solution for urban-rural changes in surface energy fluxes and ABL potential\r\ntemperature and humidity and we investigate the crossing between the ABL height and the lifting\r\ncondensation level (LCL) which is a proxy for the triggering of convective clouds. We show that\r\nurban areas are generally warmer and drier, thus causing an increase in both ABL and LCL\r\nheights. However, the response of the ABL-LCL crossing to surface conditions is non-linear and\r\nthere exists a range of free atmosphere conditions for which changes in imperviousness can\r\nimpact convective clouds."}],"publisher":"Elsevier","intvolume":"        46","_id":"22564","title":"An analytical approximation of urban heat and dry islands and their impact on convection triggering","fulldoi":"https://doi.org/10.1016/j.uclim.2022.101346","article_number":"101346","oa_version":"Published Version","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"OA_type":"hybrid","publication_status":"published","day":"01","keyword":["Urban heat island","Urban dry island","Boundary layer","Convective clouds","Analytical model"],"user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","citation":{"ama":"Chiu CTF, Wang K, Paschalis A, et al. An analytical approximation of urban heat and dry islands and their impact on convection triggering. <i>Urban Climate</i>. 2022;46. doi:<a href=\"https://doi.org/10.1016/j.uclim.2022.101346\">10.1016/j.uclim.2022.101346</a>","chicago":"Chiu, Clinton T.F., Kai Wang, Athanasios Paschalis, Tohid Erfani, Nadav Peleg, Simone Fatichi, Natalie Theeuwes, and Gabriele Manoli. “An Analytical Approximation of Urban Heat and Dry Islands and Their Impact on Convection Triggering.” <i>Urban Climate</i>. Elsevier, 2022. <a href=\"https://doi.org/10.1016/j.uclim.2022.101346\">https://doi.org/10.1016/j.uclim.2022.101346</a>.","ista":"Chiu CTF, Wang K, Paschalis A, Erfani T, Peleg N, Fatichi S, Theeuwes N, Manoli G. 2022. An analytical approximation of urban heat and dry islands and their impact on convection triggering. Urban Climate. 46, 101346.","apa":"Chiu, C. T. F., Wang, K., Paschalis, A., Erfani, T., Peleg, N., Fatichi, S., … Manoli, G. (2022). An analytical approximation of urban heat and dry islands and their impact on convection triggering. <i>Urban Climate</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.uclim.2022.101346\">https://doi.org/10.1016/j.uclim.2022.101346</a>","ieee":"C. T. F. Chiu <i>et al.</i>, “An analytical approximation of urban heat and dry islands and their impact on convection triggering,” <i>Urban Climate</i>, vol. 46. Elsevier, 2022.","mla":"Chiu, Clinton T. F., et al. “An Analytical Approximation of Urban Heat and Dry Islands and Their Impact on Convection Triggering.” <i>Urban Climate</i>, vol. 46, 101346, Elsevier, 2022, doi:<a href=\"https://doi.org/10.1016/j.uclim.2022.101346\">10.1016/j.uclim.2022.101346</a>.","short":"C.T.F. Chiu, K. Wang, A. Paschalis, T. Erfani, N. Peleg, S. Fatichi, N. Theeuwes, G. Manoli, Urban Climate 46 (2022)."},"das_tickbox":"1","status":"public","publication_identifier":{"eissn":["2212-0955"]},"date_created":"2026-07-27T12:30:24Z","month":"12","oa":1,"language":[{"iso":"eng"}],"doi":"10.1016/j.uclim.2022.101346","article_type":"original"}]