The peatland/ice age hypothesis revised, adding a possible glacial pulse trigger

Auteurs :
FRANZÉN, L.G.
CROPP, R.A.

Description :
This paper suggests that the ice age cycles during the Pleistocene are generated by the interglacial growth of peatlands and the subsequent sequestering of carbon into this terrestrial pool. The final initiation of ice age pulses towards the end of interglacials, on the other hand, is attributed to the cyclic influx of cosmic dust to the Earth surface, which in turn regulates cloud formation and the incoming shortwave radiation. These shorter cycles have a frequency of c. 1000-1250 years and might be connected to sunspot or other low frequency solar variations. Therefore, the present global warming might just be the early part of a new warm period such as the Bronze Age and the Roman and Medieval Warm periods.


Type de document :
Article de périodique

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2007, vol. 89, n°. 4, p. 301-330, nombre de pages : 30, Collation : Illustration, Références bibliographiques : 5 p.

Date :
2007

Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi