Atmospheric conditions related to extreme heat and human comfort in the city of Rio de Janeiro (Brazil) during the first quarter of the year 2024
Titel: | Atmospheric conditions related to extreme heat and human comfort in the city of Rio de Janeiro (Brazil) during the first quarter of the year 2024 |
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Verfasser: | ; ; ; |
Veröffentlicht: | Freiburg : Universität, 2024 |
Umfang: | 1 Online-Ressource |
Format: | E-Book |
Sprache: | Englisch |
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P. $4aut $7123177855 $8Matzarakis, Andreas$Z1960- [Tp3] $9154161209 033A $pFreiburg $nUniversität 034D $a1 Online-Ressource 037A $aAtmosphere. - 15, 8 (2024) , 973, ISSN: 2073-4433 037I $uhttp://vocabularies.coar-repositories.org/access_rights/c_abf2 $fUnrestricted online access 037J $aOpen Access $2star $uhttp://purl.org/coar/access_right/c_abf2 $fUnrestricted online access 045E $c910 046X $aArchivierung/Langzeitarchivierung gewährleistet $5DE-101 047I $aAbstract: This study aims to investigate the atmospheric conditions and human thermal comfort related to extreme heat in Rio de Janeiro during the first quarter of 2024. The dataset includes meteorological data from the A636-Jacarepaguá station of INMET and seven stations from the Alerta Rio system. Weather types were classified using principal components analysis (PCA) and cluster analysis (CA). Additionally, three thermal comfort indices were calculated: the heat index (HI), physiologically equivalent temperature (PET), and modified PET (mPET). Five groups of surface weather types were identified, with two being more frequent and associated with extreme heat events. These two groups accounted for over 70% of the days in all months. Critical thermal sensation values were found, particularly at the Guaratiba station, where the daytime HI exceeded 60 °C, and at the Riocentro station, where the nighttime HI surpassed 40 °C. The HI showed a greater range and variability compared with the PET and mPET, highlighting the importance of investigating microclimatic factors which intensify urban heat in central and coastal areas and cause daytime overheating in more distant regions like Guaratiba. 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