Articles | Volume 18, issue 9
https://doi.org/10.5194/cp-18-2045-2022
https://doi.org/10.5194/cp-18-2045-2022
Research article
 | Highlight paper
 | 
02 Sep 2022
Research article | Highlight paper |  | 02 Sep 2022

South American Summer Monsoon variability over the last millennium in paleoclimate records and isotope-enabled climate models

Rebecca Orrison, Mathias Vuille, Jason E. Smerdon, James Apaéstegui, Vitor Azevedo, Jose Leandro P. S. Campos, Francisco W. Cruz, Marcela Eduarda Della Libera, and Nicolás M. Stríkis

Related authors

Model and proxy evidence for coordinated changes in the hydroclimate of distant regions over the Last Millennium
Pedro José Roldán-Gómez, Jesús Fidel González-Rouco, Jason E. Smerdon, and Félix García-Pereira
Clim. Past, 19, 2361–2387, https://doi.org/10.5194/cp-19-2361-2023,https://doi.org/10.5194/cp-19-2361-2023, 2023
Short summary
Spatiotemporal Intertropical Convergence Zone dynamics during the last 3 millennia in northeastern Brazil and related impacts in modern human history
Giselle Utida, Francisco W. Cruz, Mathias Vuille, Angela Ampuero, Valdir F. Novello, Jelena Maksic, Gilvan Sampaio, Hai Cheng, Haiwei Zhang, Fabio Ramos Dias de Andrade, and R. Lawrence Edwards
Clim. Past, 19, 1975–1992, https://doi.org/10.5194/cp-19-1975-2023,https://doi.org/10.5194/cp-19-1975-2023, 2023
Short summary
SISALv3: A global speleothem stable isotope and trace element database
Nikita Kaushal, Franziska A. Lechleitner, Micah Wilhelm, Janica C. Bühler, Kerstin Braun, Yassine Ait Brahim, Khalil Azennoud, Andy Baker, Yuval Burstyn, Laia Comas-Bru, Yonaton Goldsmith, Sandy P. Harrison, István G. Hatvani, Kira Rehfeld, Magdalena Ritzau, Vanessa Skiba, Heather M. Stoll, József G. Szűcs, Pauline C. Treble, Vitor Azevedo, Jonathan L. Baker, Sakonvan Chawchai, Andrea Columbu, Laura Endres, Jun Hu, Zoltán Kern, Alena Kimbrough, Koray Koç, Monika Markowska, Belen Martrat, Syed Masood Ahmad, Carole Nehme, Valdir Felipe Novello, Carlos Pérez-Mejías, Jiaoyang Ruan, Natasha Sekhon, Nitesh Sinha, Carol V. Tadros, Benjamin H. Tiger, Sophie Warken, Annabel Wolf, Haiwei Zhang, and the SISAL Working Group members
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2023-364,https://doi.org/10.5194/essd-2023-364, 2023
Preprint under review for ESSD
Short summary
Multidecadal variability of the ITCZ from the Last Millennium Extreme Precipitation Changes in Northeastern Brazil
Isela Leonor Vásquez P., Humberto Alves Barbosa, Gilvan Sampaio, César Arturo Sánchez P., Giselle Utida, David Pareja Quispe, Juan Gregorio Rejas Ayuga, Hugo Abi Karam, Jelena Maksic, Marília Harami Shimizu, and Francisco William Cruz
EGUsphere, https://doi.org/10.5194/egusphere-2022-785,https://doi.org/10.5194/egusphere-2022-785, 2022
Short summary
A pseudoproxy assessment of why climate field reconstruction methods perform the way they do in time and space
Sooin Yun, Jason E. Smerdon, Bo Li, and Xianyang Zhang
Clim. Past, 17, 2583–2605, https://doi.org/10.5194/cp-17-2583-2021,https://doi.org/10.5194/cp-17-2583-2021, 2021
Short summary

Related subject area

Subject: Atmospheric Dynamics | Archive: Terrestrial Archives | Timescale: Centennial-Decadal
Long-term global ground heat flux and continental heat storage from geothermal data
Francisco José Cuesta-Valero, Almudena García-García, Hugo Beltrami, J. Fidel González-Rouco, and Elena García-Bustamante
Clim. Past, 17, 451–468, https://doi.org/10.5194/cp-17-451-2021,https://doi.org/10.5194/cp-17-451-2021, 2021
Short summary
Past African dust inputs in the western Mediterranean area controlled by the complex interaction between the Intertropical Convergence Zone, the North Atlantic Oscillation, and total solar irradiance
Pierre Sabatier, Marie Nicolle, Christine Piot, Christophe Colin, Maxime Debret, Didier Swingedouw, Yves Perrette, Marie-Charlotte Bellingery, Benjamin Chazeau, Anne-Lise Develle, Maxime Leblanc, Charlotte Skonieczny, Yoann Copard, Jean-Louis Reyss, Emmanuel Malet, Isabelle Jouffroy-Bapicot, Maëlle Kelner, Jérôme Poulenard, Julien Didier, Fabien Arnaud, and Boris Vannière
Clim. Past, 16, 283–298, https://doi.org/10.5194/cp-16-283-2020,https://doi.org/10.5194/cp-16-283-2020, 2020
Short summary
Two types of North American droughts related to different atmospheric circulation patterns
Angela-Maria Burgdorf, Stefan Brönnimann, and Jörg Franke
Clim. Past, 15, 2053–2065, https://doi.org/10.5194/cp-15-2053-2019,https://doi.org/10.5194/cp-15-2053-2019, 2019
Short summary
Centennial-scale precipitation anomalies in the southern Altiplano (18° S) suggest an extratropical driver for the South American summer monsoon during the late Holocene
Ignacio A. Jara, Antonio Maldonado, Leticia González, Armand Hernández, Alberto Sáez, Santiago Giralt, Roberto Bao, and Blas Valero-Garcés
Clim. Past, 15, 1845–1859, https://doi.org/10.5194/cp-15-1845-2019,https://doi.org/10.5194/cp-15-1845-2019, 2019
Short summary
Early summer hydroclimatic signals are captured well by tree-ring earlywood width in the eastern Qinling Mountains, central China
Yesi Zhao, Jiangfeng Shi, Shiyuan Shi, Xiaoqi Ma, Weijie Zhang, Bowen Wang, Xuguang Sun, Huayu Lu, and Achim Bräuning
Clim. Past, 15, 1113–1131, https://doi.org/10.5194/cp-15-1113-2019,https://doi.org/10.5194/cp-15-1113-2019, 2019
Short summary

Cited articles

Ampuero, A., Stríkis, N. M., Apaéstegui, J., Vuille, M., Novello, V. F., Espinoza, J. C., Cruz, F. W., Vonhof, H., Mayta, V. C., Martins, V. T. S., Corderio, R. C., Azevedo, V., and Sifeddine, A.: The forest effects on the isotopic composition of rainfall in the northwestern Amazon Basin., J. Geophys. Res.-Atmos., 125, e2019JD031445, https://doi.org/10.1029/2019JD031445, 2020. 
Anchukaitis, K. J. and Tierney, J. E.: Identifying coherent spatiotemporal modes in time-uncertain proxy paleoclimate records, Clim. Dynam., 41, 1291–1306, https://doi.org/10.1007/s00382-012-1483-0, 2013. 
Apaéstegui, J., Cruz, F. W., Sifeddine, A., Vuille, M., Espinoza, J. C., Guyot, J. L., Khodri, M., Strikis, N., Santos, R. V., Cheng, H., Edwards, L., Carvalho, E., and Santini, W.: Hydroclimate variability of the northwestern Amazon Basin near the Andean foothills of Peru related to the South American Monsoon System during the last 1600 years, Clim. Past, 10, 1967–1981, https://doi.org/10.5194/cp-10-1967-2014, 2014. 
Apaéstegui, J., Cruz, F. W., Vuille, M., Fohlmeister, J., Espinoza, J. C., Siffedine, A., Strikis, N. M., Guyot, J. L., Ventura, R., Cheng, H., and Edwards, R. L.: Precipitation changes over the eastern Bolivian Andes inferred from speleothem (δ18O) records for the last 1400 years, Earth Planet. Sc. Lett., 494, 124–134, https://doi.org/10.1016/j.epsl.2018.04.048, 2018. 
Aron, P. G., Poulsen, C. J., Fiorella, R. P., Levin, N. E., Acosta, R. P., Yanites, B. J., and Cassel, E. J.: Variability and Controls on δ18O, d-excess, and Δ17O in Southern Peruvian Precipitation, J. Geophys. Res.-Atmos., 126, e2020JD034009, https://doi.org/10.1029/2020JD034009, 2021. 
Download
Co-editor-in-chief
This study presents a novel Monte Carlo Empirical Orthogonal Function analysis that combines a dense isotopic proxy network with isotope-enabled climate models to study dynamics and variability of South American Monsoon System (SAMS) over past millennium. This analysis reveals that the leading modes of SAMS variability over the past millennium are regionally stable, arising independently of external forcing (solar, volcanic, orbital). Significant enhancement of the SAMS is accompanied by southward displacement of the South Atlantic Convergence Zone during the Little Ice Age, giving rise to a strengthened South American precipitation dipole. Proxy-model comparison demonstrates outstanding mismatches in centennial-scale hydroclimate departures during the Medieval Climate Anomaly and Little Ice Age from the last millennium mean state. The results of last millennium SASM variability contextualizes modern variability of SASM. The identified proxy data-model mismatch raises a key question to climate simulations of SASM variability, which may attract broad attention from paleoclimate modeling community. Moreover, the reported methodology can be applied to paleoclimate problems of various spatial and temporal scales and is of relevance for the broader geoscience community.
Short summary
We evaluated the South American Summer Monsoon over the last millennium and dynamically interpreted the principal modes of variability. We find the spatial patterns of the monsoon are an intrinsic feature of the climate modulated by external forcings. Multi-centennial mean state departures during the Medieval Climate Anomaly and Little Ice Age show regionally coherent patterns of hydroclimatic change in both a multi-archive network of oxygen isotope records and isotope-enabled climate models.