Climate of the Past
Climate of the Past
CP
Articles | Volume 20, issue 3
Articles | Volume 20, issue 3
https://doi.org/10.5194/cp-20-757-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-20-757-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 3
Research article
 | 
02 Apr 2024
Research article |  | 02 Apr 2024

Early 20th century Southern Hemisphere cooling

Stefan Brönnimann, Yuri Brugnara, and Clive Wilkinson

Data sets

Daily temperature and sea-level pressure fields for the Southern Hemisphere 1901-1930 S. Brönnimann https://doi.org/10.48620/371

GISS Surface Temperature Analysis (GISTEMP) GISTEMP Team https://data.giss.nasa.gov/gistemp/

NOAA-CIRES-DOE Twentieth Century Reanalysis Version 3 L. C. Slivinski et al. https://doi.org/10.5065/H93G-WS83

ModE-RA - A global monthly paleo-reanalysis to study climate variability during the past 600 years V. Valler et al. https://www.wdc-climate.de/ui/entry?acronym=ModE-RA

Berkeley Earth Combined Land and Ocean Temperature Field, Jan 1850--Nov 2019 Rohde, R. and Hausfather, Z. https://doi.org/10.5281/zenodo.3634713

NOAA Global Surface Temperature Dataset (NOAAGlobalTemp), Version 5.1 R. S. Vose et al. https://doi.org/10.25921/2tj4-0e21

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Short summary
The early 20th century warming – the first phase of global warming in the 20th century – started from a peculiar cold state around 1910. We digitised additional ship logbooks for these years to study this specific climate state and found that it is real and likely an overlap of several climatic anomalies, including oceanic variability (La Niña) and volcanic eruptions.
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