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CLIMA E CLIMI
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Gli elementi del clima
1. TEMPERATURA
Varia per:
Latitudine
Altitudine
Vicinanza all’acqua
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2. PRESSIONE ATMOFERICA
Si misura in millibar con il barometro
Dipende da:
Altitudine
Temperatura Aria
Vapore acqueo
I venti derivano da differenze di pressione (si spostano da zone cicloniche a zone anticicloniche)
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3. UMIDITÀ
TIPOLOGIA DEI VENTI
1. Costanti: ex. alisei
2. Periodici: ex. monsoni
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I climi nel mondo
LE ZONE CLIMATICHE
Delimitate da: tropici e circoli polari
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1. CLIMI TROPICALI
Temperatura
Precipitazioni
Stagioni
Ambienti
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2. CLIMI TEMPERATI
Temperatura
Precipitazioni
Stagioni
Ambienti
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3. CLIMI FREDDI
Temperatura
Precipitazioni
Stagioni
Ambienti
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Le modificazioni del clima
STORIA DELLE VARIAZIONI CLIMATICHE
1. Glaciazioni (l’ultima 11000 anni fa)
2. 2000 a.C. condizioni simili alle attuali
3. Alternanza secoli caldi e freddi
4. 1590-1850: piccola età glaciale
5. Dopo 1900: graduale aumento temperature
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L’UOMO E IL CLIMA
Effetto serra
Per approfondire: https://www.youtube.com/watch?v=D_ElsAGzT2A
Buco nell’ozono
Per approfondire: http://www.raiscuola.rai.it/articoli/il-buco-dellozono-storia-della-scienza/7823/default.aspx
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Buco nell’ozono
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