Last Glacial Maximum (LGM) climate forcing and  ocean dynamical feedback and their implications  for estimating climate sensitivity

Zhu, Jiang; Poulsen, Christopher J.

doi:https://doi.org/10.5194/cp-17-253-2021

Articles | Volume 17, issue 1

https://doi.org/10.5194/cp-17-253-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/cp-17-253-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 1

Research article

| Highlight paper

|

27 Jan 2021

Research article | Highlight paper |

| 27 Jan 2021

Last Glacial Maximum (LGM) climate forcing and ocean dynamical feedback and their implications for estimating climate sensitivity

Jiang Zhu and Christopher J. Poulsen

Data sets

Simulation data for "LGM climate forcing and ocean dynamical feedback and their implications for estimating climate sensitivity" J. Zhu and C. J. Poulsen https://doi.org/10.5281/zenodo.3948405

Model code and software

Community Earth System Model version 1.2.2.1 Community Earth System Model Software Engineering Group https://svn-ccsm-models.cgd.ucar.edu/cesm1/release_tags/cesm1_2_2_1/

Short summary

Climate sensitivity has been directly calculated from paleoclimate data. This approach relies on good understandings of climate forcings and interactions within the Earth system. We conduct Last Glacial Maximum simulations using a climate model to quantify the forcing and efficacy of ice sheets and greenhouse gases and to directly estimate climate sensitivity in the model. Results suggest that the direct calculation overestimates the truth by 25 % due to neglecting ocean dynamical feedback.