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Spectral characteristics of instrumental and climate model surface temperatures

Permanent link
https://hdl.handle.net/10037/10773
DOI
https://doi.org/10.1175/JCLI-D-15-0457.1
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Date
2016-02-05
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Author
Fredriksen, Hege-Beate; Rypdal, Kristoffer
Abstract
The spatiotemporal temperature variability for several gridded instrumental and general circulation climate model data is characterized, contrasting power spectra of local and global temperatures, land and sea temperatures, and temperatures of different regions. There is generally a high degree of agreement between the spectral characteristics of instrumental and climate model data. All but the equatorial spectra exhibit a power-law shape and are hence more consistent with the spectra expected from long-memory processes than from short-memory processes. The power-law exponent b of the spectra is a measure of memory, or persistence, of the temperatures and is observed to be about twice as large for global temperature than for local temperatures. However, there are large variations, in particular between land and sea surface temperatures. This is shown by estimates of the spectra for different regions and global maps of b. It is also demonstrated that global spectra are related to local spectra via teleconnections between local temperatures.
Description
Source: Journal of Climate. doi: 10.1175/JCLI-D-15-0457
© 2016 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act September 2010 Page 2 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC §108, as revised by P.L. 94-553) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS.
Publisher
American Meteorological Society
Citation
Fredriksen H, Rypdal K. Spectral characteristics of instrumental and climate model surface temperatures. Journal of Climate. 2016;29(4):1253-1268
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