Wat is die uitwerking van oneweredige verhitting op die aarde se energiebalans?
Dit is warmer op die ewenaar as by die pole.
Wat is kortgolfstraling en langgolfstraling?
Kortgolfstraling: (insolasie)
Inkomende sonstraling –hoë-energie, kortgolfstraling wat die aarde se oppervlak verhit.
Langgolfstraling: (aardradiasie)
Verhitte aarde, straal lae-energie, langgolfstrale terug na die atmosfeer. (infrarooi-energie)
Dit verhit die atmosfeer.
Kortgolf-
radiasie
Langgolf-radiasie
Son
Atmosfeer
Aarde
Betekenis van Insolasie:
Insolasie: Inkomende solere radiasie (straling) wat die aardoppervlak bereik.
Meer sonenergie bereik die trope - sonstrale val byna loodreg op die oppervlak.
By die pole is die oppervlak weggekantel van die inkomende sonstrale – sonstrale val teen
skuinshoek op die oppervlak.
Waarom is dit kouer naby die pole?
• Die hoek van inkomende sonstrale is klein, dus is sonverhitting min.
• Die sonstrale moet deur 'n dikker atmosferiese laag dring en energie word afgestaan deur
absorpsie, verstrooiing en weerkaatsing.
• Die energie van die inkomende straling is oor 'n groter oppervlakte versprei by Pole.
• Blink wit ys en sneeu weerkaats meer inkomende energie terug na die ruimte.
, Wat is die belangrikheid van die aarde se as en omwenteling om die son.
Wat veroorsaak die seisoene?
1. Omwenteling.
2. Kanteling van die aarde.
3. Bolvormigheid van die aarde.
Wat is die seisoenale effek op die energiebalans?
• Somer - wanneer daardie halfrond na die son gekantel is omdat dit langer dagligure het.
Sonstilstand op 21 Desember. Langer dae, kort nagte.
• Winter - wanneer 'n halfrond weggekantel is van die son, ontvang en behou dit minder
inkomende straling. Sonstilstand op 21 Junie. Korter dae en langer nagte.
• Herfs en Lente - Met die dag-en-nageweninge
• (21 Mrt en 23 Sept) is die son reg bokant die ewenaar - 'n 12 uur-dag en 'n 12 uur-nag. Die
twee halfronde kry ewe veel sonstraling.
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