Determination of heat wave definition temperatures in Spain at an isoclimatic level: time trend of heat wave duration and intensity across the decade 2009–2018

Environmental Sciences Europe

Table 1 Variations across the decade 2009–2018 in the number of days, mean intensity and annual intensity of heat waves, with a breakdown by the different Autonomous Regions of Spain

	Number of isoclimatic regions	Decadal trend in Num [number of hot days] (days)	Decadal trend in Intmean [mean heat wave intensity] (°C/day)	Decadal trend in Intotal [annual heat wave intensity] (°C)
Andalusia	28	6^a	0.4^a	12.9^a
Aragon	9	2	0.0	5.3
Asturias	4	7^a	0.4^a	20.0^a
Balearic Isles	7	− 4	− 0.2	− 2.1
Canary Islands	10	− 3^a	− 1.5^a	− 4.6
Cantabria	4	3^a	0.5^a	15.4
Castile & León	19	4^a	0.8^a	12.0^a
Castile-La Mancha	15	10^a	0.8^a	15.7^a
Catalonia	15	7^a	0.2^a	11.9^a
Valencian Region	11	2^a	− 0.3	4.3^a
Extremadura	8	5^a	1.5^a	18.1^a
Galicia	13	4^a	0.9^a	16.0^a
Madrid	3	1.3^a	1.2^a	1.1^a
Murcia	5	− 1.9	− 0.6^a	− 6.4^a
Navarre	4	− 0.1	− 0.3	− 1.5
Basque Country	5	0.1	0.0	3.8^a
La Rioja	2	3.4	− 0.2	11.6^a
Spain as a whole	162	3.9	0.3	9.5