δ13C values in stalagmites from tropical South America for the last two millennia
- 1Institute of Geosciences, University of São Paulo, São Paulo, 05508-080, Brazil
- 2Department of Atmospheric and Environmental Sciences, University at Albany, Albany, 2222, USA
- 3Departamento de Geoquímica, Universidade Federal Fluminense, Niterói, 24020-141, Brazil
- 4Instituto Geofísico del Perú, Lima, 15012, Peru
- 5Institut des Sciences de la Terre d'Orléans, Orléans, 45100, France
- 6Earth Observatory of Singapore, Nanyang Technological University, Jurong West, 639798, Singapore
- 7Institute of geoscience Umiversity of Campinas, 13083-85
- 8Instituto de Astronomia, Geofísica e Ciências Atmosféricas, University of São Paulo, São Paulo, 05508-090, Brazil
- 9Center for Nuclear Energy in Agriculture (CENA), University of São Paulo, São Paulo, 13416-000, Brazil
- 10Jackson School of Geosciences, University of Texas,Austin,2305,USA
- 1Institute of Geosciences, University of São Paulo, São Paulo, 05508-080, Brazil
- 2Department of Atmospheric and Environmental Sciences, University at Albany, Albany, 2222, USA
- 3Departamento de Geoquímica, Universidade Federal Fluminense, Niterói, 24020-141, Brazil
- 4Instituto Geofísico del Perú, Lima, 15012, Peru
- 5Institut des Sciences de la Terre d'Orléans, Orléans, 45100, France
- 6Earth Observatory of Singapore, Nanyang Technological University, Jurong West, 639798, Singapore
- 7Institute of geoscience Umiversity of Campinas, 13083-85
- 8Instituto de Astronomia, Geofísica e Ciências Atmosféricas, University of São Paulo, São Paulo, 05508-090, Brazil
- 9Center for Nuclear Energy in Agriculture (CENA), University of São Paulo, São Paulo, 13416-000, Brazil
- 10Jackson School of Geosciences, University of Texas,Austin,2305,USA
Abstract. Due to the many factors controlling δ13C values in stalagmites, complicating their paleoclimatic and paleoenvironmental interpretation, most studies do not present δ13C values, but instead focus mainly on δ18O values. This is also the case for most cave studies from tropical South America, where many new δ18O stalagmite records covering the last millennia were recently published. Here, we test the influence of local hydroclimate, altitude, temperature and changing vegetation types on δ13C values in stalagmites, by employing a new dataset (named δ13C_2k_SA, https://doi.pangaea.de/10.1594/PANGAEA.919050) composed of published and unpublished carbon isotope records from various sites in tropical South America. Most locations were dominated by C3 plants over the last two millennia and are characterized by speleothem δ13C values more depleted than −6 ‰. The main factors influencing δ13C values are associated with the local hydroclimate, followed by minor effects from temperature. Most of the isotopic records show a significant correlation between the δ13C and δ18O values, indicating a close relationship between local hydroclimate and atmospheric convective processes related to the South American Monsoon System.
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Preprint
(1838 KB)
Valdir Felipe Novello et al.
Interactive discussion


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RC1: 'ESSD-2020-184 manuscript review', Anonymous Referee #1, 27 Aug 2020
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AC1: 'Response to the Reviewer 1', Valdir Novello, 12 Oct 2020
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AC1: 'Response to the Reviewer 1', Valdir Novello, 12 Oct 2020
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RC2: 'Referee Comment', Anonymous Referee #2, 05 Sep 2020
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AC2: 'Response to the Reviewer 2', Valdir Novello, 12 Oct 2020
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AC2: 'Response to the Reviewer 2', Valdir Novello, 12 Oct 2020
Interactive discussion


-
RC1: 'ESSD-2020-184 manuscript review', Anonymous Referee #1, 27 Aug 2020
-
AC1: 'Response to the Reviewer 1', Valdir Novello, 12 Oct 2020
-
AC1: 'Response to the Reviewer 1', Valdir Novello, 12 Oct 2020
-
RC2: 'Referee Comment', Anonymous Referee #2, 05 Sep 2020
-
AC2: 'Response to the Reviewer 2', Valdir Novello, 12 Oct 2020
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AC2: 'Response to the Reviewer 2', Valdir Novello, 12 Oct 2020
Valdir Felipe Novello et al.
Valdir Felipe Novello et al.
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