Articles | Volume 18, issue 9
https://doi.org/10.5194/cp-18-2045-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-18-2045-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
South American Summer Monsoon variability over the last millennium in paleoclimate records and isotope-enabled climate models
Department of Atmospheric and Environmental Sciences, University at
Albany, Albany, NY, 12226, USA
Mathias Vuille
Department of Atmospheric and Environmental Sciences, University at
Albany, Albany, NY, 12226, USA
Jason E. Smerdon
Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, 10964, USA
James Apaéstegui
Peruvian Institute of Geophysics, Lima, 15012, Peru
Programa de Maestria en Rucursos Hídricos, Universidad Nacional Agraria La Molina, Lima, 15024, Perú
Vitor Azevedo
Departamento de Geoquímica, Universidade Federal Fluminense,
Niterói, Brazil
Department of Geology, Trinity College Dublin, Dublin, D02 PN40,
Ireland
Jose Leandro P. S. Campos
Institute of Geosciences, University of São Paulo, São Paulo, 05508, Brazil
Francisco W. Cruz
Institute of Geosciences, University of São Paulo, São Paulo, 05508, Brazil
Marcela Eduarda Della Libera
Institute for Geosciences, Johannes-Gutenberg-Universität, Mainz, Rhineland-Palatinate, 55122, Germany
Nicolás M. Stríkis
Departamento de Geoquímica, Universidade Federal Fluminense,
Niterói, Brazil
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- Future Projections of Low‐Level Atmospheric Circulation Patterns Over South Tropical South America: Impacts on Precipitation and Amazon Dry Season Length J. Agudelo et al. 10.1029/2023JD038658
- Fire-human-climate interactions in the Bolivian Amazon rainforest ecotone from the Last Glacial Maximum to late Holocene S. Maezumi et al. 10.3389/fearc.2023.1208985
- The southern Brazilian tropical forest during the penultimate Pleistocene glaciation and its termination A. Aviles et al. 10.1002/jqs.3594
- A 300-year tree-ring δ18O-based precipitation reconstruction for the South American Altiplano highlights decadal hydroclimate teleconnections M. Rodriguez-Caton et al. 10.1038/s43247-024-01385-9
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8 citations as recorded by crossref.
- Spatiotemporal Intertropical Convergence Zone dynamics during the last 3 millennia in northeastern Brazil and related impacts in modern human history G. Utida et al. 10.5194/cp-19-1975-2023
- Changes in the South American Monsoon System components since the Last Glacial Maximum: a TraCE-21k perspective I. Custódio et al. 10.1007/s00382-024-07139-9
- Future Projections of Low‐Level Atmospheric Circulation Patterns Over South Tropical South America: Impacts on Precipitation and Amazon Dry Season Length J. Agudelo et al. 10.1029/2023JD038658
- Fire-human-climate interactions in the Bolivian Amazon rainforest ecotone from the Last Glacial Maximum to late Holocene S. Maezumi et al. 10.3389/fearc.2023.1208985
- The southern Brazilian tropical forest during the penultimate Pleistocene glaciation and its termination A. Aviles et al. 10.1002/jqs.3594
- A 300-year tree-ring δ18O-based precipitation reconstruction for the South American Altiplano highlights decadal hydroclimate teleconnections M. Rodriguez-Caton et al. 10.1038/s43247-024-01385-9
- Assessing the past and future dynamics of the Asian summer monsoon: Insights from palaeomonsoon synthesis and CMIP6 data M. Shekhar et al. 10.1016/j.gecadv.2023.100004
- On the Remote Impacts of Mid‐Holocene Saharan Vegetation on South American Hydroclimate: A Modeling Intercomparison S. Tiwari et al. 10.1029/2022GL101974
1 citations as recorded by crossref.
Latest update: 29 Jun 2024
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.
This study presents a novel Monte Carlo Empirical Orthogonal Function analysis that combines a...
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.
We evaluated the South American Summer Monsoon over the last millennium and dynamically...