Table 1 Gridded data sets used for the calibration of proxy system models (GISTEMP and GPCC) and for the verification of reconstructed results

From: A new last two millennium reanalysis based on hybrid gain analog offline EnKF and an expanded proxy database

Data Set

Acronym

Reference

NASA Goddard Institute for Space Studies Surface Temperature Analysis

GISTEMP

Hansen et al.,43

Met Office Hadley Centre Climatic Research Unit Temperature, version 4.4.0.0

HadCRUT4

Morice et al., 2012

Berkeley Earth Surface Temperatures

BE

Rohde et al., 2013

NOAA Merged Land-Ocean Surface Temperature Analysis, version 3.5.4

MLOST

Smith et al., 2008

NOAA’s 20th century reanalysis version 2

20CR

Compo et al., 2011

NOAA Global Surface Temperature, version 4.0.1

NOAA

Huang et al., 2020

Global Precipitation Climatology Centre, version 6

GPCC

Schneider et al.,44