Paper: Izumi et al 2023

Title: Global footprints of Dansgaard-Oeschger oscillations in a GCM

For a fuller description of the paper itself, go to the end of this web page.

Each simulation published in this paper corresponds to a unique 5 or 6 character code on the web pages.
The following table lists the name of the simulation as used in the paper, and the corresponding code name

The webpage gives you the ability to examine the published simulations, but you can also download the raw (netcdf) files to perform your own analysis. Detailed instructions on how to use the webpages and access the data can be found here: Using_BRIDGE_webpages.pdf

There is 1 simulation used in this study. See Table 2 for more information.

You can have make you own analysis and plots by going here

Simulation Name as in PaperSimulation name on web pages

This is a fuller description of paper

This paper investigates impacts of DO-like oscillations on the global climate and vegetation.

NameIzumi et al. 2023
Brief DescriptionThis paper investigates impacts of DO-like oscillations on the global climate and vegetation.
Full Author ListIzumi, K. and Armstrong, E.and Valdes, P. J.
TitleGlobal footprints of Dansgaard-Oeschger oscillations in a GCM
JournalQuaternary Science Reviews
Contact's NameKenji IZUMI
AbstractThe mechanisms driving the Dansgaard-Oeschger (DO) cycles remain uncertain, but promising hypotheses that could explain it, and a comprehensive assessment of its impact is needed. We have identified DO-like millennial-scale climate variability in a glacial simulation based on the salt oscillator hypothesis with the HadCM3B coupled atmosphere-ocean-vegetation model. The simulated DO-like warming shows temperature changes of 7.1 ± 2.5 degC in Greenland, comparable to DO9 and DO6, the smallest temperature changes of the observed DO events. This study focuses on the impacts of DO-like events on climate and vegetation beyond the North Atlantic. We find that the simulated warming in the Northern Hemisphere extratropics during Greenland interstadials agree with available proxy estimates. The simulated tropical hydroclimatic responses during the interstadials, such as northward propagation of the Intertropical Convergence Zone, strengthening of some Northern Hemisphere summer monsoons, and weakening of some Southern Hemisphere monsoons, are also consistent with proxy estimates. Moreover, simulated vegetation cover increases in the Northern Hemisphere during interstadials relative to stadials, while there are no large-scale dominant vegetation changes, consistent with observed biome changes associated with DO6. Our simulation based on the salt oscillator hypothesis can account for many observed features of DO events. However, it cannot simulate several observed climate responses in the equatorial Indian and western Pacific Oceans, including the East Asian and South African monsoon. The causes of those mismatches need to be further explored, whether they are hypothesis-dependent or model-dependent.