Articles | Volume 18, issue 9
Clim. Past, 18, 2045–2062, 2022
https://doi.org/10.5194/cp-18-2045-2022
Clim. Past, 18, 2045–2062, 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 et al.

Related authors

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
δ13C values in stalagmites from tropical South America for the last two millennia
Valdir Felipe Novello, Francisco William da Cruz, Mathias Vuille, José Leandro Pereira Silveira Campos, Nicolás Misailidis Stríkis, James Apáestegui, Jean Sebastien Moquet, Vitor Azevedo, Angela Ampuero, Giselle Utida, Xianfeng Wang, Gustavo Macedo Paula-Santos, Plinio Jaqueto, Luiz Carlos Ruiz Pessenda, Daniel O. Breecker, and Ivo Karmann
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2020-184,https://doi.org/10.5194/essd-2020-184, 2020
Preprint withdrawn
Short summary
Dynamical and hydrological changes in climate simulations of the last millennium
Pedro José Roldán-Gómez, Jesús Fidel González-Rouco, Camilo Melo-Aguilar, and Jason E. Smerdon
Clim. Past, 16, 1285–1307, https://doi.org/10.5194/cp-16-1285-2020,https://doi.org/10.5194/cp-16-1285-2020, 2020
Short summary
Synoptic and Mesoscale atmospheric features associated with an extreme Snowstorm over the Central Andes in August 2013
Marcelo Zamuriano, Paul Froidevaux, Isabel Moreno, Mathias Vuille, and Stefan Brönnimann
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2019-286,https://doi.org/10.5194/nhess-2019-286, 2019
Publication in NHESS not foreseen
Glacier equilibrium line altitude variations during the “Little Ice Age” in the Mediterranean Andes (30◦–37◦ S)
Álvaro González-Reyes, Claudio Bravo, Mathias Vuille, Martin Jacques-Coper, Maisa Rojas, Esteban Sagredo, and James McPhee
Clim. Past Discuss., https://doi.org/10.5194/cp-2019-37,https://doi.org/10.5194/cp-2019-37, 2019
Publication in CP not foreseen
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.