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dc.contributor.author	Fung, Inez Y.
dc.contributor.author	Huybers, Peter John
dc.contributor.author	Stine, Alexander R.
dc.date.accessioned	2009-10-28T14:28:58Z
dc.date.issued	2009
dc.identifier.citation	Stine, Alexander R., Peter John Huybers, and Inez Y. Fung. 2009. Changes in the phase of the annual cycle of surface temperature. Nature 457: 435-440.	en_US
dc.identifier.issn	0028-0836	en_US
dc.identifier.uri	http://nrs.harvard.edu/urn-3:HUL.InstRepos:3355939
dc.description.abstract	The annual cycle in the Earth's surface temperature is extremely large—comparable in magnitude to the glacial–interglacial cycles over most of the planet. Trends in the phase and the amplitude of the annual cycle have been observed, but the causes and significance of these changes remain poorly understood—in part because we lack an understanding of the natural variability. Here we show that the phase of the annual cycle of surface temperature over extratropical land shifted towards earlier seasons by 1.7 days between 1954 and 2007; this change is highly anomalous with respect to earlier variations, which we interpret as being indicative of the natural range. Significant changes in the amplitude of the annual cycle are also observed between 1954 and 2007. These shifts in the annual cycles appear to be related, in part, to changes in the northern annular mode of climate variability, although the land phase shift is significantly larger than that predicted by trends in the northern annular mode alone. Few of the climate models presented by the Intergovernmental Panel on Climate Change reproduce the observed decrease in amplitude and none reproduce the shift towards earlier seasons.	en_US
dc.description.sponsorship	Earth and Planetary Sciences	en_US
dc.language.iso	en_US	en_US
dc.publisher	Nature Publishing Group	en_US
dc.relation.isversionof	http://dx.doi.org/10.1038/nature07675	en_US
dc.relation.hasversion	http://www.people.fas.harvard.edu/~phuybers/	en_US
dash.license	LAA
dc.title	Changes in the Phase of the Annual Cycle of Surface Temperature	en_US
dc.type	Journal Article	en_US
dc.description.version	Version of Record	en_US
dc.relation.journal	Nature -London-	en_US
dash.depositing.author	Huybers, Peter John
dc.date.available	2009-10-28T14:28:58Z

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  Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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