Articles | Volume 12, issue 2
Research article
10 May 2021
Research article |  | 10 May 2021

Comparison of CMIP6 historical climate simulations and future projected warming to an empirical model of global climate

Laura A. McBride, Austin P. Hope, Timothy P. Canty, Brian F. Bennett, Walter R. Tribett, and Ross J. Salawitch

Data sets

Input and Output Files EM-GC Laura McBride, Austin Hope, Timothy Canty, Brian Bennett, Walter Tribett, and Ross Salawitch


RCP Concentration Calculations and Data M. Meinshausen, S. Smith, D. van Vuuren, A. Thomson, T. Masui, and K. Riahi

Multivariate ENSO Index Version 2 (MEI.v2) NOAA/PSL

Extended Multivariate ENSO Index (MEI.ext) K. Wolter and M. S. Timlin

PDO Index N. Mantua

Global Satellite-based Stratospheric Aerosol Climatology L. Thomason

Total solar irradiance data Laboratory for Atmospheric and Space Physics

Climate analysis section J. Fasullo and M. Balmaseda

SODA: A reanalysis of climate J. Carton

Global mean OHC time series of 0--700 m L. Cheng

Four observational time series 1955-2017 L. Cheng

Global ocean heat and salt content NOAA/NCEI

SSP database (Shared Socioeconomic Pathways) – version 2.0 IIASA

CMIP6 Forcing Datasets Summary P. Durack and K. Taylor

CMIP6 World Climate Research Programme

Short summary
We use a reduced-complexity climate model trained by observations to show that at the current rate of human release of CO2, total cumulative emissions will pass the 66 % likelihood of limiting warming to 1.5° or 2°C in about 10 and 35 years, respectively. We also show that complex climate models often used to guide policy tend to warm faster than observed over the past few decades. To achieve the Paris Climate Agreement, CO2 and CH4 emissions must be severely curtailed in the next decade.
Final-revised paper