Search results for "South Atlantic Convergence Zone"

showing 3 items of 3 documents

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
researchProduct

A Global Climatology of Tropical Moisture Exports

2013

Abstract In a recent paper, a climatology of tropical moisture exports (TMEs) to the Northern Hemisphere (NH) was constructed on the basis of 7-day forward trajectories, started daily from the tropical lower troposphere, which were required to reach a water vapor flux of at least 100 g kg−1 m s−1 somewhere north of 35°N. It was shown that TMEs contribute significantly to regional precipitation. Here, the authors complement and extend this work by (i) using 6-hourly European Centre for Medium-Range Weather Forecasts (ECMWF) Interim Re-Analysis (ERA-Interim) data from 1979 to 2010 instead of the earlier 40-yr ECMWF Re-Analysis (ERA-40), (ii) extending the climatology to the Southern Hemispher…

TroposphereAtmospheric ScienceMoistureAtmospheric circulationClimatologyNorthern HemisphereRossby waveSouth Pacific convergence zoneSouth Atlantic Convergence ZoneAtmospheric sciencesSouthern HemisphereGeologyJournal of Climate
researchProduct

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
researchProduct