Ultra-sensitive Flow Injection Analysis (FIA) determination of calcium in ice cores at ppt level

A 2700-year annual timescale and accumulation history for an ice core from Roosevelt Island, West Antarctica

“…Each minute, 5 mL meltwater 34 was directed to each of two fraction collectors (IC and ICP-MS aliquots) and 1.1 mL was 35 used for continuous measurements of water isotopes (0.05 mL) and black carbon (1.05 mL) 36 by the LGR and DMT SP2 instruments. The remaining 1.8 mL was sent to flow-through 37 liquid conductivity and insoluble particle analyzers (Bigler et al, 2011), and then split for 38 continuous analysis of soluble calcium (Traversi et al, 2007) and acidity (Kjaer et al, 2016 The RID-75 core was previously annually dated using the water isotope profile along with 38 constraints from peaks in total specific β-activity from atmospheric nuclear bomb tests in the 39 mid-1950s and 1960s (Clausen et al, 1979). Isotope matching of the two cores is consistent 40 with high-resolution 239 Pu measurements on the RICE main core (Fig.…”

A 2700-year annual timescale and accumulation history for an ice core from Roosevelt Island, West Antarctica

“…In addition, extended regional sea-ice cover reduces the availability of local moisture sources. With ∼ 40-60 % of the precipitation arriving to Roosevelt Island originating from local sources in the southern Ross Sea (Tuohy et al, 2015), the relationship between sea-ice extent and precipitation rate at Roosevelt Island may also be ascribed to a longer distillation pathway of moist air masses during periods of extended sea ice (Noone and Simmons, 2004;Kuttel et al, 2012).…”

A Novel Fast Ion Chromatographic Method for the Analysis of Fluoride in Antarctic Snow and Ice

“…This concerns the species present in the atmosphere as aerosols or water-soluble gases the change of which over the past inferred from Antarctica ice cores has been already discussed in numerous recent works − following the pioneer study conducted over the entire last climatic cycle at Vostok . Over the past years, many analytical systems were developed in order to obtain high-resolution chemical stratigraphies by coupling a continuous melting system with continuous or semicontinuous analytical techniques, such as continuous flow analysis (CFA), , inductively coupled plasma-mass spectrometry (ICP-MS), and fast ion chromatography (FIC). , Ice cores contain detailed records of past volcanism spanning time periods up to tens of thousand years. − During volcanic eruptions, large amounts of dust, ash, tephra particles, and SO 2 are emitted into the atmosphere; the released sulfur dioxide is then rapidly oxidized to sulfuric acid (H 2 SO 4 ) and transported over long distances. Volcanic stratigraphies recorded in ice cores can be reconstructed using different methods with different degrees of specificity.…”

“…This concerns the species present in the atmosphere as aerosols or water-soluble gases the change of which over the past inferred from Antarctica ice cores has been already discussed in numerous recent works 4−7 following the pioneer study conducted over the entire last climatic cycle at Vostok. 8 Over the past years, many analytical systems were developed in order to obtain high-resolution chemical stratigraphies by coupling a continuous melting system 9 with continuous or semicontinuous analytical techniques, such as continuous flow analysis (CFA), 10,11 inductively coupled plasma-mass spectrometry (ICP-MS), 12 and fast ion chromatography (FIC). 13,14 Ice cores contain detailed records of past volcanism spanning time periods up to tens of thousand years.…”