Reconstructing Holocene temperatures in time and space using paleoclimate data assimilation

28Citations
Citations of this article
51Readers
Mendeley users who have this article in their library.
Get full text

Abstract

Paleoclimatic records provide valuable information about Holocene climate, revealing aspects of climate variability for a multitude of sites around the world. However, such data also possess limitations. Proxy networks are spatially uneven, seasonally biased, uncertain in time, and present a variety of challenges when used in concert to illustrate the complex variations of past climate. Paleoclimatic data assimilation provides one approach to reconstructing past climate that can account for the diverse nature of proxy records while maintaining the physics-based covariance structures simulated by climate models. Here, we use paleoclimate data assimilation to create a spatially complete reconstruction of temperature over the past 12000 years using proxy data from the Temperature 12k database and output from transient climate model simulations. Following the last glacial period, the reconstruction shows Holocene temperatures warming to a peak near 6400 years ago followed by a slow cooling toward the present day, supporting a mid-Holocene which is at least as warm as the preindustrial. Sensitivity tests show that if proxies have an overlooked summer bias, some apparent mid-Holocene warmth could actually represent summer trends rather than annual mean trends. Regardless, the potential effects of proxy seasonal biases are insufficient to align the reconstructed global mean temperature with the warming trends seen in transient model simulations.

Cite

CITATION STYLE

APA

Erb, M. P., Mckay, N. P., Steiger, N., Dee, S., Hancock, C., Ivanovic, R. F., … Valdes, P. (2022). Reconstructing Holocene temperatures in time and space using paleoclimate data assimilation. Climate of the Past, 18(12), 2599–2629. https://doi.org/10.5194/cp-18-2599-2022

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free