Controls over spatial and seasonal variations on isotopic composition of the precipitation along the central and eastern portion of Brazil

Based on Global Network Isotopes in Precipitation (GNIP) isotopic data set, a review of the spatial and temporal variability of δ 18 O and δ 2 H in precipitation was conducted throughout central and eastern Brazil, indicating that dynamic interactions between Intertropical and South Atlantic Converg...

Full description

Saved in:
Bibliographic Details
Published in:Isotopes in environmental and health studies 2017-10, Vol.53 (5), p.518-538
Main Authors: Gastmans, Didier, Santos, Vinícius, Galhardi, Juliana Aparecida, Gromboni, João Felipe, Batista, Ludmila Vianna, Miotlinski, Konrad, Chang, Hung Kiang, Govone, José Silvio
Format: Article
Language:English
Subjects:
Air Movements
Brazil
Brazilian climate
Composition effects
Convergence zones
Deuterium
deuterium excess
Environmental Monitoring
hydrogen-2
Hydrologic data
isotope hydrology
Isotopes
Meteorological parameters
Multiple regression analysis
multiple regression model
Oxygen Isotopes
oxygen-18
Precipitation
Rain
Rainfall
Rainforests
Regression analysis
Seasonal variations
Seasons
Spatial distribution
Stable isotopes
Temporal variations
Variability
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Based on Global Network Isotopes in Precipitation (GNIP) isotopic data set, a review of the spatial and temporal variability of δ 18 O and δ 2 H in precipitation was conducted throughout central and eastern Brazil, indicating that dynamic interactions between Intertropical and South Atlantic Convergence Zones, Amazon rainforest, and Atlantic Ocean determine the variations on the isotopic composition of precipitation over this area. Despite the seasonality and latitude effects observed, a fair correlation with precipitation amount was found. In addition, Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) air mass back trajectories were used to quantify the factors controlling daily variability in stable isotopes in precipitation. Through a linear multiple regression analysis, it was observed that temporal variations were consistent with the meteorological parameters derived from HYSPLIT, particularly precipitation amount along the trajectory and mix depth, but are not dependent on vapour residence time in the atmosphere. These findings also indicate the importance of convective systems to control the isotopic composition of precipitation in tropical and subtropical regions.
ISSN:1025-6016
1477-2639
DOI:10.1080/10256016.2017.1305376