Recent warming reverses long-term arctic cooling

D.S. kaufman; Bo Møllesøe Vinther

doi:10.1126/science.1173983

Recent warming reverses long-term arctic cooling

D.S. kaufman, Bo Møllesøe Vinther

Is-, Klima- og Geofysik

501 Citationer (Scopus)

Abstract

The temperature history of the first millennium C.E. is sparselydocumented, especially in the Arctic. We present a synthesisof decadally resolved proxy temperature records from polewardof 60°N covering the past 2000 years, which indicates thata pervasive cooling in progress 2000 years ago continued throughthe Middle Ages and into the Little Ice Age. A 2000-year transientclimate simulation with the Community Climate System Model showsthe same temperature sensitivity to changes in insolation asdoes our proxy reconstruction, supporting the inference thatthis long-term trend was caused by the steady orbitally drivenreduction in summer insolation. The cooling trend was reversedduring the 20th century, with four of the five warmest decadesof our 2000-year-long reconstruction occurring between 1950and 2000.
Udgivelsesdato: 4 September

Originalsprog	Engelsk
Tidsskrift	Science
Vol/bind	325
Udgave nummer	5945
Sider (fra-til)	1236-1239
Antal sider	3
ISSN	0036-8075
DOI	https://doi.org/10.1126/science.1173983
Status	Udgivet - 2009

Emneord

Det Natur- og Biovidenskabelige Fakultet

Adgang til dokumentet

10.1126/science.1173983

Citationsformater

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abstract = "The temperature history of the first millennium C.E. is sparsely documented, especially in the Arctic. We present a synthesis of decadally resolved proxy temperature records from poleward of 60°N covering the past 2000 years, which indicates that a pervasive cooling in progress 2000 years ago continued through the Middle Ages and into the Little Ice Age. A 2000-year transient climate simulation with the Community Climate System Model shows the same temperature sensitivity to changes in insolation as does our proxy reconstruction, supporting the inference that this long-term trend was caused by the steady orbitally driven reduction in summer insolation. The cooling trend was reversed during the 20th century, with four of the five warmest decades of our 2000-year-long reconstruction occurring between 1950 and 2000. Udgivelsesdato: 4 September",

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AU - kaufman, D.S.

AU - Vinther, Bo Møllesøe

PY - 2009

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N2 - The temperature history of the first millennium C.E. is sparsely documented, especially in the Arctic. We present a synthesis of decadally resolved proxy temperature records from poleward of 60°N covering the past 2000 years, which indicates that a pervasive cooling in progress 2000 years ago continued through the Middle Ages and into the Little Ice Age. A 2000-year transient climate simulation with the Community Climate System Model shows the same temperature sensitivity to changes in insolation as does our proxy reconstruction, supporting the inference that this long-term trend was caused by the steady orbitally driven reduction in summer insolation. The cooling trend was reversed during the 20th century, with four of the five warmest decades of our 2000-year-long reconstruction occurring between 1950 and 2000. Udgivelsesdato: 4 September

AB - The temperature history of the first millennium C.E. is sparsely documented, especially in the Arctic. We present a synthesis of decadally resolved proxy temperature records from poleward of 60°N covering the past 2000 years, which indicates that a pervasive cooling in progress 2000 years ago continued through the Middle Ages and into the Little Ice Age. A 2000-year transient climate simulation with the Community Climate System Model shows the same temperature sensitivity to changes in insolation as does our proxy reconstruction, supporting the inference that this long-term trend was caused by the steady orbitally driven reduction in summer insolation. The cooling trend was reversed during the 20th century, with four of the five warmest decades of our 2000-year-long reconstruction occurring between 1950 and 2000. Udgivelsesdato: 4 September

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DO - 10.1126/science.1173983

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