Modes of global climate variability during marine isotope stage 3 (60–26 ka
Recent analysis of 38 globally distributed paleoclimatic records covering Marine Isotope Stage 3 (MIS 3) 60–26 ka demonstrated that the two leading empirical orthogonal functions (EOFs) explaining the data are the Greenland ice-core signal (‘‘northern’ ’ signal) and the Antarctic ice-core signal (‘‘...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1026.3460 2023-05-15T13:36:21+02:00 Modes of global climate variability during marine isotope stage 3 (60–26 ka Nicklas G. Pisias Peter U. Clark Edward J. Brook The Pennsylvania State University CiteSeerX Archives 2010 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1026.3460 http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/27747/PisiasNicklasG.CEOAS.ModesGlobalClimate.pdf%3Bjsessionid%3D657F9E57B2E772A896E46E288F1737CE?sequence%3D1 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1026.3460 http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/27747/PisiasNicklasG.CEOAS.ModesGlobalClimate.pdf%3Bjsessionid%3D657F9E57B2E772A896E46E288F1737CE?sequence%3D1 Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/27747/PisiasNicklasG.CEOAS.ModesGlobalClimate.pdf%3Bjsessionid%3D657F9E57B2E772A896E46E288F1737CE?sequence%3D1 text 2010 ftciteseerx 2016-10-30T00:03:05Z Recent analysis of 38 globally distributed paleoclimatic records covering Marine Isotope Stage 3 (MIS 3) 60–26 ka demonstrated that the two leading empirical orthogonal functions (EOFs) explaining the data are the Greenland ice-core signal (‘‘northern’ ’ signal) and the Antarctic ice-core signal (‘‘southern’ ’ signal). Here singular spectral analysis (SSA) is used to show that millennial-scale variability of each of these two leading EOFs is characterized by two independent modes. The two modes of each EOF share similar relative distributions of variance, identical spectra, and, where each mode has spectral power, coherency spectra, which are significantly above the null hypothesis level at 95 % confidence. The only difference between the modes of the northern and southern signals is that they are phase shifted. The phasing and long response time of the low-frequency mode, combined with its relationship to atmospheric CO2 and sea level, are consistent with coupled changes in the ocean, ice sheets, atmosphere, and carbon cycle, whereas the phasing and short response time of the high-frequency mode are consistent with an atmospheric transmission likely induced by changes in hemispheric sea ice distributions and attendant feedbacks. 1. Text Antarc* Antarctic Greenland Greenland ice core ice core Sea ice Unknown Antarctic Greenland The Antarctic |
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description |
Recent analysis of 38 globally distributed paleoclimatic records covering Marine Isotope Stage 3 (MIS 3) 60–26 ka demonstrated that the two leading empirical orthogonal functions (EOFs) explaining the data are the Greenland ice-core signal (‘‘northern’ ’ signal) and the Antarctic ice-core signal (‘‘southern’ ’ signal). Here singular spectral analysis (SSA) is used to show that millennial-scale variability of each of these two leading EOFs is characterized by two independent modes. The two modes of each EOF share similar relative distributions of variance, identical spectra, and, where each mode has spectral power, coherency spectra, which are significantly above the null hypothesis level at 95 % confidence. The only difference between the modes of the northern and southern signals is that they are phase shifted. The phasing and long response time of the low-frequency mode, combined with its relationship to atmospheric CO2 and sea level, are consistent with coupled changes in the ocean, ice sheets, atmosphere, and carbon cycle, whereas the phasing and short response time of the high-frequency mode are consistent with an atmospheric transmission likely induced by changes in hemispheric sea ice distributions and attendant feedbacks. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Nicklas G. Pisias Peter U. Clark Edward J. Brook |
spellingShingle |
Nicklas G. Pisias Peter U. Clark Edward J. Brook Modes of global climate variability during marine isotope stage 3 (60–26 ka |
author_facet |
Nicklas G. Pisias Peter U. Clark Edward J. Brook |
author_sort |
Nicklas G. Pisias |
title |
Modes of global climate variability during marine isotope stage 3 (60–26 ka |
title_short |
Modes of global climate variability during marine isotope stage 3 (60–26 ka |
title_full |
Modes of global climate variability during marine isotope stage 3 (60–26 ka |
title_fullStr |
Modes of global climate variability during marine isotope stage 3 (60–26 ka |
title_full_unstemmed |
Modes of global climate variability during marine isotope stage 3 (60–26 ka |
title_sort |
modes of global climate variability during marine isotope stage 3 (60–26 ka |
publishDate |
2010 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1026.3460 http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/27747/PisiasNicklasG.CEOAS.ModesGlobalClimate.pdf%3Bjsessionid%3D657F9E57B2E772A896E46E288F1737CE?sequence%3D1 |
geographic |
Antarctic Greenland The Antarctic |
geographic_facet |
Antarctic Greenland The Antarctic |
genre |
Antarc* Antarctic Greenland Greenland ice core ice core Sea ice |
genre_facet |
Antarc* Antarctic Greenland Greenland ice core ice core Sea ice |
op_source |
http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/27747/PisiasNicklasG.CEOAS.ModesGlobalClimate.pdf%3Bjsessionid%3D657F9E57B2E772A896E46E288F1737CE?sequence%3D1 |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1026.3460 http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/27747/PisiasNicklasG.CEOAS.ModesGlobalClimate.pdf%3Bjsessionid%3D657F9E57B2E772A896E46E288F1737CE?sequence%3D1 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766077518546206720 |