0000000000359444

AUTHOR

Brittany Marie Ward

showing 3 related works from this author

Late Quaternary Variations in the South American Monsoon System as Inferred by Speleothems – New Perspectives Using the SISAL Database

2018

Here we present an overview of speleothem δ18O records from South America, most of which are available in the Speleothem Isotopes Synthesis and Analysis (SISAL_v1) database. South American tropical and subtropical speleothem δ18O time series are primarily interpreted to reflect changes in precipitation amount, the amount effect, and consequently history of convection intensity variability of convergence zones such as the Intertropical Convergence Zone (ITCZ) and the South America Monsoon System (SAMS). We investigate past hydroclimate scenarios in South America related to the South American Monsoon System in three different time periods: Late Pleistocene, Holocene, and the last two millenni…

geographygeography.geographical_feature_categoryDatabaseIntertropical Convergence ZoneSpeleothemSubtropicscomputer.software_genreMonsoonatmospheric_sciencePrecipitationSouth Atlantic Convergence ZoneQuaternarycomputerHoloceneGeology
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Late Quaternary Variations in the South American Monsoon System as Inferred by Speleothems—New Perspectives using the SISAL Database

2019

Here we present an overview of speleothem δ18O records from South America, most of which are available in the Speleothem Isotopes Synthesis and Analysis (SISAL_v1) database. South American tropical and subtropical speleothem δ18O time series are primarily interpreted to reflect changes in precipitation amount, the amount effect, and consequently history of convection intensity variability of convergence zones such as the Intertropical Convergence Zone (ITCZ) and the South America Monsoon System (SAMS). We investigate past hydroclimate scenarios in South America related to the South American Monsoon System in three different time periods: Late Pleistocene, Holocene, and the last tw…

010504 meteorology & atmospheric sciencesSAMSSpeleothemlcsh:GN281-289SubtropicsSouth American Monsoon System010502 geochemistry & geophysicscomputer.software_genreMonsoon01 natural scienceslcsh:StratigraphyEarth and Planetary Sciences (miscellaneous)PrecipitationSISALHolocenelcsh:QE640-6990105 earth and related environmental sciencesEarth-Surface Processesgeographyquaternarygeography.geographical_feature_categoryDatabasespeleothemsIntertropical Convergence ZoneMUDANÇA CLIMÁTICAlcsh:Human evolutionSouth Atlantic Convergence ZoneQuaternarycomputerGeologyQuaternary
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Vegetation and environmental changes in tropical South America from the last glacial to the Holocene documented by multiple cave sediment proxies

2019

Abstract δ 18 O values in speleothems have been utilized to document past changes in South American monsoon intensity. However, changes in regional vegetation and ecosystems have not been part of this discussion, and other cave proxies such as speleothem δ 13 C values, a useful proxy for vegetation reconstruction, have been neglected due to interpretive complexities. Here we report δ 13 C values and 87Sr/86Sr ratios in stalagmites, together with XRF-derived elemental chemistry, δ 13 Corg values and carbon content from a sedimentary profile from the same cave where the stalagmites were collected. In combination with a previously published δ 18 O record, this enables us to clarify climate and…

geographygeography.geographical_feature_category010504 meteorology & atmospheric sciencesSpeleothemLast Glacial MaximumStalagmite010502 geochemistry & geophysicsMonsoon01 natural sciencesSEDIMENTOLOGIAGeophysicsCaveSpace and Planetary ScienceGeochemistry and PetrologyPaleoclimatologyEarth and Planetary Sciences (miscellaneous)Physical geographyGlacial periodHoloceneGeology0105 earth and related environmental sciences
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