UTCI field measurements in an urban park in Florence (Italy)

Martina Petralli; Luciano Massetti; David Pearlmutter; Giada Brandani; Alessandro Messeri; Simone Orlandini

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UTCI field measurements in an urban park in Florence (Italy)

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| Jul 31, 2020

Miscellanea Geographica

Volume 24 (2020): Issue 3 (July 2020)

Thematic Issue: UTCI application in different spatial and temporal scales. Editors: Krzysztof Błażejczyk, Bożena Kicińska.

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Page range: 111 - 117

Received: Dec 19, 2019

Accepted: Apr 20, 2020

DOI: https://doi.org/10.2478/mgrsd-2020-0017

Keywords
Thermal comfort, urban park, UTCI, biometeorology, tree shade

© 2020 Martina Petralli, Luciano Massetti, David Pearlmutter, Giada Brandani, Alessandro Messeri, Simone Orlandini, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Study area and location of the micrometeorological stations: A) sun-exposed grass (Exp Grass); B) exposed asphalt (Exp Asphalt); C) shaded asphalt (S Asphalt); and D) exposed gravel (Exp Gravel). Source: figures A-B-C-D – own study; map – own study created by using OpenStreetMap®, Geoscopio WMS and QGIS 3.2.3, http://qgis.osgeo.org.

Hourly values of the Universal Thermal Climate Index (UTCI, °C) observed during sunny, hot and calm summer days in Cascine Park in Florence and corresponding to levels of thermal sensation for pedestrians over sun-exposed grass (Exp Grass), asphalt (Exp Asphalt), gravel (Exp Gravel) and tree-shaded asphalt (S Asphalt), and corresponding categories of UTCI thermal stress. Source: own study

Hourly values of the air temperature (Ta, °C) and Universal Thermal Climate Index (UTCI, °C) observed during sunny, hot and calm summer days in Cascine Park in Florence over sun-exposed asphalt (Ta Exp Asphalt, red dashed line, and UTCI Exp Asphalt, red line, respectively) and over tree-shaded asphalt (Ta S Asphalt, green dashed line, and UTCI S Asphalt, green line, respectively). Source: own study

Hourly mean values (expressed as mean ± standard deviation) of air temperature (Ta, °C), black globe temperature (Tg, °C), and mean radiant temperature (MRT, °C) collected at 1.7 metres over sun-exposed grass (Exp Grass), asphalt (Exp Asphalt) and gravel (S Gravel) and over tree-shaded asphalt (S Asphalt)

	Ta				Tg				MRT
H	Exp Grass	Exp Asphalt	S Asphalt	Exp Gravel	Exp Grass	Exp Asphalt	S Asphalt	Exp Gravel	Exp Grass	Exp Asphalt	S Asphalt	Exp Gravel
0 21.1±1.9	21.1±1.4	21.9±1.7	20.6±1.3	21.7±1.2	21.6±1.4	23.0±1.6	20.5±1.1	20.9±0.1	21.6±1.4	23.1±1.8	20.5±1.1
1 20.5±2.1	20.4±1.4	21.1±1.6	20.0±1.3	21.3±2.8	20.8±1.3	22.2±1.5	19.9±1.2	20.8±2.1	20.8±1.3	22.5±2.0	19.9±1.2
2 19.8±1.5	19.9±1.5	20.4±1.2	19.5±1.5	20.4±2.9	20.3±1.4	21.7±1.6	19.4±1.2	20.4±2.9	20.3±1.4	21.7±1.6	19.4±1.2
3 19.0±1.2	19.5±1.3	19.8±1.2	18.9±1.4	19.1±1.4	19.9±1.5	20.9±1.1	19.3±1.2	19.1±1.4	19.9±1.5	20.9±1.1	19.3±1.2
4 18.5±1.1	19.4±1.1	19.6±1.0	19.1±0.9	18.2±1.3	19.4±1.6	20.3±1.1	18.6±1.7	18.2±1.3	19.4±1.6	20.3±1.1	18.6±1.7
5 18.8±1.7	21.2±1.2	20.5±1.3	22.5±0.6	17.5±0.9	18.8±1.4	19.7±1.0	18.0±1.5	17.4±0.9	18.8±1.4	19.7±1.0	18.0±1.5
6 20.4±2.0	24.8±1.2	22.2±1.4	25.3±0.6	18.0±1.6	18.4±1.3	19.4±1.2	17.7±1.1	18.0±1.6	18.4±1.3	19.4±1.2	17.7±1.1
7 22.9±2.7	27.9±0.6	24.0±1.4	27.4±0.5	21.9±2.0	20.7±0.9	20.6±1.1	20.5±1.0	22.2±2.1	19.1±2.9	19.4±1.4	18.9±3.0
8 26.1±3.0	30.3±0.8	26.1±1.8	30.3±0.8	25.1±1.6	25.8±0.2	22.6±1.1	36.0±1.1	26.8±1.2	23.1±0.7	20.2±1.7	38.9±2.1
9 28.9±2.8	31.9±0.7	27.9±2.0	32.2±1.0	37.7±1.1	40.7±1.4	24.7±1.0	41.0±1.5	47.7±2.1	45.9±3.3	22.3±1.6	46.2±3.2
10 30.6±2.5	33.2±0.9	29.2±1.6	33.3±0.9	41.5±4.3	43.8±1.3	26.6±1.1	43.8±0.8	55.8±6.7	55.5±4.0	23.0±3.2	55.5±3.8
11 31.5±2.3	33.3±2.3	29.8±1.6	33.5±2.3	41.4±3.7	44.6±2.6	28.1±1.3	45.1±2.9	58.4±7.0	60.4±3.4	25.1±1.4	61.5±6.6
12 32.4±2.2	34.1±2.2	30.5±1.6	34.2±1.9	44.0±2.3	47.1±3.8	29.6±1.2	45.6±2.9	60.5±5.9	64.0±2.0	28.3±1.1	61.0±1.6
13 32.9±2.0	35.0±1.5	31.0±1.3	35.1±1.0	44.0±2.3	48.3±3.6	30.0±0.9	46.6±2.6	60.5±5.9	64.6±2.0	28.5±1.0	61.3±1.8
14 32.4±1.4	33.8±2.2	30.4±2.0	34.0±2.2	47.8±1.7	47.6±1.7	30.4±1.7	46.0±2.4	66.1±1.6	67.2±1.6	30.3±1.5	63.8±4.7
15 32.3±1.9	33.4±1.8	30.3±1.3	33.3±1.8	41.8±6.2	44.2±2.3	30.7±1.9	42.1±2.3	54.1±1.5	60.7±2.1	31.5±2.9	55.8±1.6
16 31.7±1.5	31.1±1.4	29.7±1.1	32.7±2.1	44.9±0.1	38.6±1.3	31.6±0.8	40.3±3.3	58.5±0.9	50.5±5.5	34.6±1.0	52.4±1.7
17 30.0±1.1	29.6±1.2	29.1±1.0	30.6±1.3	31.6±0.4	43.9±1.6	33.1±1.9	45.0±3.4	33.4±0.5	62.1±2.6	38.8±3.9	63.1±5.2
18 28.8±1.1	27.9±1.2	28.0±1.1	28.0±1.3	30.1±0.9	37.6±5.1	29.7±1.3	37.4±4.7	31.5±0.5	50.5±13.9	31.8±2.1	49.8±13
19 27.3±1.4	26.4±0.9	26.7±1.2	26.3±1.2	28.7±0.3	30.5±1.5	29.1±1.2	39.2±0.9	29.3±1.0	34.7±1.5	31.4±1.7	51.2±3.6
20 25.8±1.5	24.7±0.4	25.2±1.3	24.4±0.5	26.3±1.9	28.2±1.2	27.9±1.1	27.9±1.3	26.0±1.7	30.6±3.7	30.0±2.6	30.2±3.6
21 24.2±1.5	23.1±1.0	23.9±1.5	22.6±0.8	24.3±2.6	25.9±0.9	26.4±1.2	25.5±0.9	23.6±2.5	27.3±1.7	27.8±2.0	26.9±1.7
22 22.7±1.7	22.2±1.3	23.3±1.7	21.6±1.1	23.5±1.6	24.3±0.7	25.1±1.2	23.5±0.8	22.7±1.9	24.3±0.7	25.3±1.0	23.5±0.8
23 22.0±2.0	21.4±1.4	22.3±1.7	20.9±1.4	23.4±1.7	22.7±0.7	23.8±1.2	21.8±0.9	23.0±1.2	22.7±0.7	24.1±1.5	21.8±0.9

Daily mean, maximum and minimum values of air temperature (Ta, °C) collected at the reference weather station located near the study area (Ref), over sun-exposed grass (Exp Grass), asphalt (Exp Asphalt) and gravel (Exp Gravel), and over tree-shaded asphalt (S Asphalt), together with calculated mean values of mean radiant temperature (MRT, °C) and Universal Thermal Climate Index (UTCI, °C) over the same four surfaces

		Ref	Exp Grass	Exp Asphalt	S Asphalt	Exp Gravel
Ta	mean	26.1	26.3	27.4	25.9	27.5
	max	32.5	32.9	35.0	31.0	35.1
	min	18.3	18.5	19.4	19.6	18.9
MRT	mean		36.9	39.5	26.0	40.0
	max		66.1	67.2	38.8	63.8
	min		17.4	18.4	19.4	17.7
UTCI	mean		27.8	29.5	25.4	29.7
	max		41.7	44.6	32.6	44.1
	min		17.4	18.4	18.8	18.0

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UTCI field measurements in an urban park in Florence (Italy)

Published Online: Jul 31, 2020

Page range: 111 - 117

Received: Dec 19, 2019

Accepted: Apr 20, 2020

DOI: https://doi.org/10.2478/mgrsd-2020-0017

Keywords
Thermal comfort, urban park, UTCI, biometeorology, tree shade

© 2020 Martina Petralli, Luciano Massetti, David Pearlmutter, Giada Brandani, Alessandro Messeri, Simone Orlandini, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

Figure 2

Figure 3

UTCI field measurements in an urban park in Florence (Italy)

Published Online: Jul 31, 2020

Page range: 111 - 117

Received: Dec 19, 2019

Accepted: Apr 20, 2020

DOI: https://doi.org/10.2478/mgrsd-2020-0017

KeywordsThermal comfort, urban park, UTCI, biometeorology, tree shade

© 2020 Martina Petralli, Luciano Massetti, David Pearlmutter, Giada Brandani, Alessandro Messeri, Simone Orlandini, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Figure 1

Figure 2

Figure 3

Keywords
Thermal comfort, urban park, UTCI, biometeorology, tree shade