Show simple item record

contributor authorPisias, Nicklas G.
contributor authorClark, Peter U.
contributor authorBrook, Edward J.
date accessioned2017-06-09T16:30:03Z
date available2017-06-09T16:30:03Z
date copyright2010/03/01
date issued2010
identifier issn0894-8755
identifier otherams-68987.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4210605
description abstractRecent 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.
publisherAmerican Meteorological Society
titleModes of Global Climate Variability during Marine Isotope Stage 3 (60–26 ka)
typeJournal Paper
journal volume23
journal issue6
journal titleJournal of Climate
identifier doi10.1175/2009JCLI3416.1
journal fristpage1581
journal lastpage1588
treeJournal of Climate:;2010:;volume( 023 ):;issue: 006
contenttypeFulltext


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record