ilmastonvaihteluiden kuten keskiajan lämmin kausi ja pieni jääkausi takakana. Grönlannissa saattoi olla keskiajalla yhtä lämmintä kuin nykyään.
"Comparisons between the reconstructed temperature patterns and the results of theoretical climate model simulations suggest an important role for natural drivers of climate such as volcanoes and changes in solar output in explaining the past changes. The warmer conditions of the medieval era were tied to higher solar output and few volcanic eruptions, while the cooler conditions of the Little Ice Age resulted from lower solar output and frequent explosive volcanic eruptions. "
http://www.physorg.com/news178459644.html
Kirjoittajina ne tavalliset hörhöt...
"Comparisons between the reconstructed temperature patterns and the results of theoretical climate model simulations suggest an important role for natural drivers of climate such as volcanoes and changes in solar output in explaining the past changes. The warmer conditions of the medieval era were tied to higher solar output and few volcanic eruptions, while the cooler conditions of the Little Ice Age resulted from lower solar output and frequent explosive volcanic eruptions. "
http://www.physorg.com/news178459644.html
Kirjoittajina ne tavalliset hörhöt...
Vastaukset 1
Vanhimmat
Kirjoittajat viittaavat termostaattimekansimiin, jossa ilmaston lämmetessä Tyyni valtameri viileneekin... Eikös termostaattia käytetä lämpötilojen vaihteluiden rajaamiseen?
"Other climate models focused more specifically on the mechanisms of El Niño do however reproduce that pattern. Those models favor the "Thermostat" mechanism, where the tropical Pacific counter-intuitively tends to the cold La Niña phase during periods of increased heating, such as provided by the increase in solar output and quiescent volcanism of the medieval era."