Agreement between reconstructed and modeled boreal precipitation of the Last Interglacial

Scussolini, Paolo; Bakker, Pepijn; Guo, Chuncheng; Stepanek, Christian; Zhang, Qiong; Braconnot, Pascale; Cao, Jian; Guarino, Maria Vittoria ORCID: https://orcid.org/0000-0002-7531-4560; Coumou, Dim; Prange, Matthias; Ward, Philip J.; Renssen, Hans; Kageyama, Masa; Otto-Bliesner, Bette; Aerts, Jeroen C.J.H.. 2019 Agreement between reconstructed and modeled boreal precipitation of the Last Interglacial. Science Advances, 5 (11), eaax7047. https://doi.org/10.1126/sciadv.aax7047

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Text (Open Access) Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S.Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC) eaax7047.full.pdf Available under License Creative Commons Attribution Non-commercial 4.0. Download (4MB) | Preview

Abstract/Summary

The last extended time period when climate may have been warmer than today was during the Last Interglacial (LIG; ca. 129 to 120 thousand years ago). However, a global view of LIG precipitation is lacking. Here, seven new LIG climate models are compared to the first global database of proxies for LIG precipitation. In this way, models are assessed in their ability to capture important hydroclimatic processes during a different climate. The models can reproduce the proxy-based positive precipitation anomalies from the preindustrial period over much of the boreal continents. Over the Southern Hemisphere, proxy-model agreement is partial. In models, LIG boreal monsoons have 42% wider area than in the preindustrial and produce 55% more precipitation and 50% more extreme precipitation. Austral monsoons are weaker. The mechanisms behind these changes are consistent with stronger summer radiative forcing over boreal high latitudes and with the associated higher temperatures during the LIG.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1126/sciadv.aax7047
Date made live:	06 Dec 2019 17:27 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/526138

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