A key goal in paleoclimate research is to find a quantitative proxy of sea ice extent. I propose to investigate Bromine (Br) as a sea ice proxy, as it is concentrated by "Bromine explosion" events that occur chiefly above first-year sea ice. Going beyond the evaluation of Br concentrations, I intend to study the isotopes 79Br (abundance 50.7%) and 81Br (abundance 49.3%), which may be fractionated by Bromine explosion reactions and/or sea ice formation. A positive result could allow the Bromine isotope ratio to be linked to two important aspects of the earth climate system - sea ice extent and ozone depletion events. To achieve this, we aim to apply Br isotope ratio measurements to evaluate Br isotopic variability in polar ice at the Multi-collector-ICP-SFMS lab hosted at Ghent University.
Bromine isotopic fractionation in polar ice
Andrea Spolaor
2013
Abstract
A key goal in paleoclimate research is to find a quantitative proxy of sea ice extent. I propose to investigate Bromine (Br) as a sea ice proxy, as it is concentrated by "Bromine explosion" events that occur chiefly above first-year sea ice. Going beyond the evaluation of Br concentrations, I intend to study the isotopes 79Br (abundance 50.7%) and 81Br (abundance 49.3%), which may be fractionated by Bromine explosion reactions and/or sea ice formation. A positive result could allow the Bromine isotope ratio to be linked to two important aspects of the earth climate system - sea ice extent and ozone depletion events. To achieve this, we aim to apply Br isotope ratio measurements to evaluate Br isotopic variability in polar ice at the Multi-collector-ICP-SFMS lab hosted at Ghent University.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
