È un record storico: giovedì, ad Anchorage, la più grande città dell'Alaska, la temperatura ha superato i 32 °C, hanno annunciato i servizi meteorologici. Per trovare delle temperature così alte nello Stato americano bisogna tornare indietro al mese di giugno del 1969, quando il termometro toccò gli 85 gradi Fahrenheit, ovvero 29,4 °C.
La temperatura massima media per il 4 luglio ad Anchorage è di 18,3 °C. Ma quest'anno l'Alaska aveva già registrato una primavera insolitamente tiepida nella zona artica, particolarmente sensibile ai cambiamenti climatici.
Secondo gli studiosi, l'Alaska subisce un riscaldamento due volte più veloce rispetto alla media del Pianeta. Dal 1901 al 2016, le temperature medie negli Stati Uniti sono aumentate di un grado Celsius, mentre nello Stato del nord sono salite di 2,6 gradi, spiega Rick Thomas, esperto del Centro di valutazione e di politica del clima dell'Alaska.
Record di caldo in Alaska
Telegiornale 07.07.2019, 22:00
Record di caldo in Alaska
Telegiornale 07.07.2019, 14:30
RG 12.30 del 06.07.19: il servizio di Paolo Dell'Oca
RSI Mondo 06.07.2019, 15:39
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