Heat Waves Amplify the Urban Canopy Heat Island in Brno,
Czechia

J 2022

Heat Waves Amplify the Urban Canopy Heat Island in Brno, Czechia

JANKŮ, Zdeněk a Petr DOBROVOLNÝ

Základní údaje

Originální název

Heat Waves Amplify the Urban Canopy Heat Island in Brno, Czechia

Autoři

JANKŮ, Zdeněk a Petr DOBROVOLNÝ

Vydání

Meteorology, MDPI, 2022, 2674-0494

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10510 Climatic research

Stát vydavatele

Švýcarsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/22:00128032

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.3390/meteorology1040030

Klíčová slova anglicky

mean; maximum and minimum daily temperatures; heat waves; urban heat island; heat magnitude; Brno; Czechia

Štítky

14315030, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 26. 1. 2023 13:11, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

This study used homogenised mean, maximum, and minimum daily temperatures from 12 stations located in Brno, Czechia, during the 2011–2020 period to analyse heat waves (HW) and their impact on the canopy urban heat island (UHI). HWs were recognized as at least three consecutive days with Tx ≥ 30 °C and urban–rural and intra-urban differences in their measures were analysed. To express the HWs contribution to UHI, we calculated the UHI intensities (UHII) separately during and outside of HWs to determine the heat magnitude (HM). Our results show that all HW measures are significantly higher in urban areas. UHII is mostly positive, on average 0.65 °C; however, day-time UHII is clearly greater (1.93 °C). Furthermore, day-time UHII is amplified during HWs, since HM is on average almost 0.5 °C and in LCZ 2 it is even 0.9 °C. Land use parameters correlate well with UHII and HM at night, but not during the day, indicating that other factors can affect the air temperature extremity. Considering a long-term context, the air temperature extremity has been significantly increasing recently in the region, together with a higher frequency of circulation types that favour the occurrence of HWs, and the last decade mainly contributed to this increase.

Návaznosti

MUNI/A/1393/2021, interní kód MU

Název: Integrovaný geografický výzkum dynamiky přírodních a společenských procesů (Akronym: IGEODYN)

Investor: Masarykova univerzita, Integrovaný geografický výzkum dynamiky přírodních a společenských procesů

Citovat

JANKŮ, Zdeněk a Petr DOBROVOLNÝ. Heat Waves Amplify the Urban Canopy Heat Island in Brno, Czechia. Meteorology. MDPI, 2022, roč. 1, č. 4, s. 477-494. ISSN 2674-0494. Dostupné z: https://doi.org/10.3390/meteorology1040030.

@article{2247308,
   author = {Janků, Zdeněk and Dobrovolný, Petr},
   article_number = {4},
   doi = {https://doi.org/10.3390/meteorology1040030},
   keywords = {mean; maximum and minimum daily temperatures; heat waves; urban heat island; heat magnitude; Brno; Czechia},
   language = {eng},
   issn = {2674-0494},
   journal = {Meteorology},
   title = {Heat Waves Amplify the Urban Canopy Heat Island in Brno, Czechia},
   url = {https://www.mdpi.com/2674-0494/1/4/30},
   volume = {1},
   year = {2022}
}

TY  - JOUR
ID  - 2247308
AU  - Janků, Zdeněk - Dobrovolný, Petr
PY  - 2022
TI  - Heat Waves Amplify the Urban Canopy Heat Island in Brno, Czechia
JF  - Meteorology
VL  - 1
IS  - 4
SP  - 477-494
EP  - 477-494
PB  - MDPI
SN  - 26740494
KW  - mean
KW  - maximum and minimum daily temperatures
KW  - heat waves
KW  - urban heat island
KW  - heat magnitude
KW  - Brno
KW  - Czechia
UR  - https://www.mdpi.com/2674-0494/1/4/30
N2  - This study used homogenised mean, maximum, and minimum daily temperatures from 12 stations located in Brno, Czechia, during the 2011–2020 period to analyse heat waves (HW) and their impact on the canopy urban heat island (UHI). HWs were recognized as at least three consecutive days with Tx ≥ 30 °C and urban–rural and intra-urban differences in their measures were analysed. To express the HWs contribution to UHI, we calculated the UHI intensities (UHII) separately during and outside of HWs to determine the heat magnitude (HM). Our results show that all HW measures are significantly higher in urban areas. UHII is mostly positive, on average 0.65 °C; however, day-time UHII is clearly greater (1.93 °C). Furthermore, day-time UHII is amplified during HWs, since HM is on average almost 0.5 °C and in LCZ 2 it is even 0.9 °C. Land use parameters correlate well with UHII and HM at night, but not during the day, indicating that other factors can affect the air temperature extremity. Considering a long-term context, the air temperature extremity has been significantly increasing recently in the region, together with a higher frequency of circulation types that favour the occurrence of HWs, and the last decade mainly contributed to this increase.
ER  -

JANKŮ, Zdeněk a Petr DOBROVOLNÝ. Heat Waves Amplify the Urban Canopy Heat Island in Brno, Czechia. \textit{Meteorology}. MDPI, 2022, roč.~1, č.~4, s.~477-494. ISSN~2674-0494. Dostupné z: https://doi.org/10.3390/meteorology1040030.

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