Aridity synthesis for eight selected key regions of the global climate system during the last 60 000 years.

Fuhrmann, Florian , Diensberg, Benedikt, Gong, Xun , Lohmann, Gerrit and Sirocko, Frank (2020) Aridity synthesis for eight selected key regions of the global climate system during the last 60 000 years. Open Access Climate of the Past, 16 (6). pp. 2221-2238. DOI 10.5194/cp-16-2221-2020.

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Abstract

A compilation of the published literature on dust content in terrestrial and marine sediment cores was synchronized with pollen data and speleothem growth phases on the Greenland Ice Core Chronology 2005 (GICC05) time axis. Aridity patterns for eight key areas of the global climate system have been reconstructed for the last 60 000 years. These records have different time resolutions and different dating methods, i.e. different types of stratigraphy. Nevertheless, all regions analysed in this study show humid conditions during early Marine Isotope Stage 3 (MIS3) and the early Holocene or deglaciation, but not always at the same time. Such discrepancies have been interpreted as regional effects, although stratigraphic uncertainties may affect some of the proposed interpretations. In comparison, most of the MIS2 interval becomes arid in all of the Northern Hemisphere records, but the peak arid conditions of the Last Glacial Maximum (LGM) and Heinrich event 1 differ in duration and intensity among regions. In addition, we also compare the aridity synthesis with modelling results using a global climate model (GCM). Indeed, geological archives and GCMs show agreement on the aridity pattern for the Holocene or deglaciation, for the LGM and for late MIS3.

Document Type: Article
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.5194/cp-16-2221-2020
ISSN: 1814-9332
Related URLs:
Projects: PalMod
Date Deposited: 16 Nov 2020 10:21
Last Modified: 08 Feb 2021 07:30
URI: http://oceanrep.geomar.de/id/eprint/51026

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