Fréquence et intensité des îlots de chaleur à rennes : bilan de 16 années d’observations (2004-2019).
Vincent Dubreuil
- Fonction : Auteur
- PersonId : 4905
- IdHAL : vincent-dubreuil
- ORCID : 0000-0001-8383-805X
- IdRef : 057532974
Xavier Foissard
- Fonction : Auteur
- PersonId : 8963
- IdHAL : xavier-foissard
- IdRef : 189058811
Jean Nabucet
- Fonction : Auteur
- PersonId : 6750
- IdHAL : jean-nabucet
- IdRef : 234062029
Alban Thomas
- Fonction : Auteur
- PersonId : 6279
- IdHAL : alban-thomas
- ORCID : 0000-0002-7403-8867
- IdRef : 179295969
Hervé Quénol
- Fonction : Auteur
- PersonId : 1985
- IdHAL : herve-quenol
- ORCID : 0000-0002-5562-2232
- IdRef : 069368104
Résumé
This article focuses on the observation of the urban heat island (UHI) in Rennes from 2004 to 2019. The existence of a relatively old and dense urban observation network makes it possible to quantify the frequency and intensity of the UHI according to the hour of the day and the season: the mean UHI thus reaches 1.3°C but it approaches 3°C on average at night in late summer and can sometimes exceed 7°C. Strong UHI situations, above 4°C, represent more than 17% of observations on average but up to almost 30% in September. In 2019 as in 2011, a record number of high intensity UHIs were noticed, essentially resulting from a high frequency of radiative situations (strong sunshine, weak wind). The spatialization of the UHI shows that the classic gradient between downtown and the periurban area is not symmetrical between the south and the north of the agglomeration: indeed, the presence of parks and valleys to the north generates islands of freshness whose intensity varies according to their size.
Format du dépôt | Notice |
---|---|
Type de dépôt | Article dans une revue |
Sous-Titre |
en
Frequency and intensity of urban heat islands in Rennes: assessment of 16 years of monitoring (2004-2019).
|
Résumé |
en
This article focuses on the observation of the urban heat island (UHI) in Rennes from 2004 to 2019. The existence of a relatively old and dense urban observation network makes it possible to quantify the frequency and intensity of the UHI according to the hour of the day and the season: the mean UHI thus reaches 1.3°C but it approaches 3°C on average at night in late summer and can sometimes exceed 7°C. Strong UHI situations, above 4°C, represent more than 17% of observations on average but up to almost 30% in September. In 2019 as in 2011, a record number of high intensity UHIs were noticed, essentially resulting from a high frequency of radiative situations (strong sunshine, weak wind). The spatialization of the UHI shows that the classic gradient between downtown and the periurban area is not symmetrical between the south and the north of the agglomeration: indeed, the presence of parks and valleys to the north generates islands of freshness whose intensity varies according to their size.
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Titre |
fr
Fréquence et intensité des îlots de chaleur à rennes : bilan de 16 années d’observations (2004-2019).
|
Auteur(s) |
Vincent Dubreuil
1
, Xavier Foissard
1
, Jean Nabucet
1
, Alban Thomas
1
, Hervé Quénol
1
1
LETG - Rennes -
Littoral, Environnement, Télédétection, Géomatique
( 3177 )
- Maison de la Recherche Place du Recteur Henri Le Moal 35043 RENNES CEDEX
- France
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Langue du document |
Français
|
Nom de la revue |
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
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Audience |
Internationale
|
Date de publication |
2020
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Date de publication électronique |
2021-02-15
|
Volume |
17
|
Numéro |
6
|
Page/Identifiant |
1-17
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URL éditeur |
https://climatology.edpsciences.org/articles/climat/full_html/2020/01/climat20201706/climat20201706.html
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Domaine(s) |
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Mots-clés |
en
urban heat island
|
DOI | 10.1051/climat/202017006 |
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