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1. The last millennium climate reanalysis project: Framework and first results: LAST MILLENNIUM REANALYSIS

   https://doi.org/10.1002/2016JD024751  

   Hakim, Gregory J. ; Emile-Geay, Julien ; Steig, Eric J. ; Noone, David ; Anderson, David M. ; Tardif, Robert ; Steiger, Nathan ; Perkins, Walter A. ( June 2016 , Journal of Geophysical Research: Atmospheres)
2. The Tropical Pacific ENSO–Mean State Relationship in Climate Models over the Last Millennium

   https://doi.org/10.1175/JCLI-D-19-0673.1  

   Wyman, D. Allie ; Conroy, Jessica. L. ; Karamperidou, Christina ( September 2020 , Journal of Climate)

   Abstract ENSO and the mean zonal sea surface temperature gradient (dSST) of the tropical Pacific are important drivers of global climate and vary on decadal to centennial time scales. However, the relationship between dSST and ENSO cannot be assessed with the short instrumental record, and is uncertain in proxy data, with intervals of both stronger and weaker ENSO postulated to occur with overall strong dSST in the past. Here we assess the ENSO–dSST relationship during the last millennium using general circulation models (GCMs) participating in phase 3 of the Paleoclimate Modeling Intercomparison Project. Last millennium GCM simulations show diversity in the strength and direction of the ENSO–dSST relationship. Yet, the models that best simulate modern tropical Pacific climate frequently have a more negative ENSO–dSST correlation. Thus, last millennium tropical Pacific climate simulations support the likelihood of enhanced ENSO during decadal to centennial periods of reduced tropical Pacific dSST. However, the alternating directional ENSO–dSST relationship in all model simulations suggests that this relationship is not constant through time and is likely controlled by multiple mechanisms. 

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3. The Role of Internal Variability in ITCZ Changes Over the Last Millennium

   https://doi.org/10.1029/2021GL096487  

   Roldán‐Gómez, P. J. ; González‐Rouco, J. F. ; Melo‐Aguilar, C. ; Smerdon, J. E. ( February 2022 , Geophysical Research Letters)
4. ENSO-driven coupled megadroughts in North and South America over the last millennium

   https://doi.org/10.1038/s41561-021-00819-9  

   Steiger, Nathan J. ; Smerdon, Jason E. ; Seager, Richard ; Williams, A. Park ; Varuolo-Clarke, Arianna M. ( October 2021 , Nature Geoscience)
5. Enhanced climate variability during the last millennium recorded in alkenone sea surface temperatures of the northwest Pacific margin

   https://doi.org/10.1016/j.gloplacha.2021.103558  

   Lee, Kyung Eun ; Park, Wonsun ; Yeh, Sang-Wook ; Bae, Si Woong ; Ko, Tae Wook ; Lohmann, Gerrit ; Nam, Seung-Il ( September 2021 , Global and Planetary Change)