Late Quaternary Variations in the South American Monsoon System as Inferred by Speleothems—New Perspectives Using the Sisal Database
Bibliographic Data
| ID | 15801975 |
|---|---|
| Authors | Michael Deininger (0000-0002-4930-4908, Johannes Gutenberg University Mainz, corresponding author), Brittany Marie Ward (0000-0001-6670-2433, University of Waikato), F Novello (0000-0002-0120-3745, Universidade de São Paulo), F W Cruz (0000-0002-4030-4581, Universidade de São Paulo) |
| Year | 2019 |
| Volume | 2 |
| Issue | 1 |
| Pages | 6-6 |
| Publication date | 2019-01-28 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Quaternary (JOURNAL) |
| Journal identifiers | ISSN: 2571-550X • E-ISSN: 2571-550X |
| Publisher | Multidisciplinary Digital Publishing Institute (PUBLISHER • CH) |
| DOI | 10.3390/quat2010006 |
| OpenAlex | W2895423828 |
| Language | EN |
| Citations received | 11 |
| References cited | 55 |
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 millennia. Precession driven summertime insolation is the main driver of convective variability over the continent during the last 120 kyrs (from present day to 120 kyrs BP), including the Holocene. However, there is a dipole between speleothem δ18O records from western and eastern South America. Records located in the central region of Brazil are weakly affected by insolation-driven variability, and instead are more susceptible to the variability associated with the South Atlantic Convergence Zone (SACZ). Cold episodic events in the Northern Hemisphere, such as Heinrich and Bond Events, and the Little Ice Age, increase the convective activity of the SAMS, resulting in increased precipitation amount in South America
Archaeology · Cave · Climate change · Climatology · East Asian Monsoon · Geography · Holocene · Intertropical Convergence Zone · Monsoon · Northern Hemisphere · Paleoclimatology · Precipitation · Quaternary · Speleothem · Stable isotope ratio · Stalagmite · Subtropics · δ18O · Geological and Geophysical Studies Worldwide · Geological formations and processes · Geology and Paleoclimatology Research · Geology · Oceanography · Paleontology
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| Unique citing works | 11 |
|---|---|
| Citations per year | 1,38 |
| Citation span | 2018 - 2026 (9) |
| Citation velocity | current |
| Highly cited | No |
| Citation types | Neutral: 9 |