Global T CFR - Global gridded temperature reconstruction method comparisons

Global T CFR timeline

Overview

*This project is now finished/concluded*

Our input database: Temperature proxy collection of PAGES2k Consortium (2017).

In 2017, the PAGES2k consortium published a comprehensive collection of temperature sensitive proxy records covering the Common Era.

This collaborative group effort used that PAGES 2k temperature database to produce reconstructions of global gridded surface temperature over the past 2000 years.

We aimed to produce a dataset of spatially explicit (5°x5° spatial resolution) temperatures covering the Common Era to be used for multiple purposes, such as data-model comparison, detection and attribution, and the analysis of modes and mechanisms that operate in the climate system.

We used six different climate field reconstruction (CFR) methods and consistent input data and reconstruction parameters, to obtain comparable reconstructions. Reconstruction ensembles allow to analyze the spatio-temporal consistency of temperature anomalies, trends and variability and quantify the associated uncertainties.

The multi-method approach also helped to identify robust features of pre-industrial temperature variability that are not biased by an individual reconstruction method. It allows us to assess how the results of the various methods agree and disagree (such as low-frequency amplitudes vs. decadal-scale fluctuations, timing of extremes, spectral slopes, spatio-temporal distribution of skill and uncertainties).

> Global T CFR scientific goals

> Global T CFR people

> Global T CFR paper

Learn more and participate

This group is now closed. Queries can be emailed to project coordinator Raphael Neukom (see Global T CFR people).

Subscribe to the 2k Network mailing list here.