Vulnerability of climate on Earth to sudden changes in insolation
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Vulnerability of climate on Earth to sudden changes in insolation. / Bendtsen, Jørgen; Bjerrum, Christian J.
In: Geophysical Research Letters, Vol. 29, No. 15, 01.08.2002, p. 1-1-1-4.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Vulnerability of climate on Earth to sudden changes in insolation
AU - Bendtsen, Jørgen
AU - Bjerrum, Christian J.
PY - 2002/8/1
Y1 - 2002/8/1
N2 - The cooling of the Earth after a large sudden change in the solar insolation is buffered by the large heat reservoir in the ocean. For the present day temperature distribution it takes at least one decade to cool down the ocean to the freezing point of seawater. With a simple coupled climate model the influence of the radiative forcing expected to follow an extra-terrestrial impact or from extensive volcanic activity is determined. We show that the radiative forcing associated with an impact of a similar size to the one which occured at the K/T-boundary, has a significant influence on the climate system, and that the outcome of such an impact is critically dependent upon the initial thermal state of the ocean. Ultimately, such an impact could have led to a complete ice-covered Earth due to the combined effect from the decreased insolation and the ice-albedo feedback.
AB - The cooling of the Earth after a large sudden change in the solar insolation is buffered by the large heat reservoir in the ocean. For the present day temperature distribution it takes at least one decade to cool down the ocean to the freezing point of seawater. With a simple coupled climate model the influence of the radiative forcing expected to follow an extra-terrestrial impact or from extensive volcanic activity is determined. We show that the radiative forcing associated with an impact of a similar size to the one which occured at the K/T-boundary, has a significant influence on the climate system, and that the outcome of such an impact is critically dependent upon the initial thermal state of the ocean. Ultimately, such an impact could have led to a complete ice-covered Earth due to the combined effect from the decreased insolation and the ice-albedo feedback.
UR - http://www.scopus.com/inward/record.url?scp=85081149016&partnerID=8YFLogxK
M3 - Journal article
AN - SCOPUS:85081149016
VL - 29
SP - 1-1-1-4
JO - Geophysical Research Letters (Online)
JF - Geophysical Research Letters (Online)
SN - 1944-8007
IS - 15
ER -
ID: 248989352