Fig. 3: Reconstructions of large-scale temperature variability over the last 2000 years that were published since AR5 of the IPCC. | Communications Earth & Environment

Fig. 3: Reconstructions of large-scale temperature variability over the last 2000 years that were published since AR5 of the IPCC.

From: The IPCC’s reductive Common Era temperature history

Fig. 3

Reconstructions variably target seasonal to annual mean temperatures in the (a) Northern Hemisphere (Sch15, Sto15, Wil16, Xin16, Gui17, Bün20), and annual temperatures for the (b) Southern Hemisphere (Neu14) and (c) globally (P2k19; as shown in Fig. 2) over varying periods of the Common Era (see Table 1 for details). All reconstructions were smoothed using a 20-year low-pass filter and temperatures are shown as anomalies from their 1850–1900 means. Hemispheric and global means of land and ocean temperatures derived from HadCRUT5 instrumental analysis1 are also shown in each respective panel from 1850-2020 (red). Instrumental temperatures were also referenced to zero mean in the 1850–1900 interval and filtered with a 20-year lowpass filter. These instrumental representations are all consistent with the 2021 IPCC report.

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