English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/11898
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Abrupt wind regime changes in the North Atlantic Ocean during the past 30,000—60,000 years

AuthorsLópez-Martínez, Constancia ; Grimalt, Joan O. ; Hoogakker, Babette; Gruetzner, Jens; Vautravers, Maryline J.; McCave, I. Nicholas
KeywordsWind regime
Atlantic Ocean
Issue Date15-Dec-2006
PublisherAmerican Geophysical Union
CitationPaleoceanography 21(4): 1-12 (2006)
AbstractThe inputs of higher plants in Blake Outer Ridge (subtropical western North Atlantic) during marine isotope stage 3 (MIS3) have been recorded at high resolution by quantification of C-23 – C-33 odd carbon numbered n-alkanes and C-20 – C-30 even carbon numbered n-alkan-1-ols in sediment sections of Ocean Drilling Program Site 1060. The changes of these proxies at this open marine site are mainly related to eolian inputs. Their concentrations and fluxes exhibit major abrupt variations that are correlated with Dansgaard/Oeschger (D/O) patterns in Greenland ice cores. The ratios between interstadials and stadials range between 2 and 9 times. The intense flux increases in the D/O stadials are linked to strong enhancements of the westerly wind regime at these subtropical latitudes during stadials. The observed variation was paralleled by changes in wind-blown dust and the polar circulation index in Greenland ice, which is in agreement with previously hypothesized atmospheric teleconnections between northern and middle-low latitudes of the Northern Hemisphere. The close correspondence between sedimentary and ice core proxies is evidence that crossings of the glacial climate thresholds involved major reorganizations of the troposphere. The observed large rise in higher plant biomarkers indicates that climate stabilization in the D/O stadial conditions led to main increases in wind intensity.
Description12 pages, 5 figures, 2 tables.
Publisher version (URL)http://dx.doi.org/10.1029/2006PA001275
Appears in Collections:(IDAEA) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.