Chemistry & impurities group
MSc and BSc projects in Continuous Flow Analysis (CFA) of chemistry and impurities.
These particular master and bachelor projects involve chemical measurements of ice cores, for example informing on wind patterns, aridity, volcanic eruptions and sea ice variability.
Further Development of the LISA (Light weight In-Situ Analysis) box (60 ECTS)
A light weight version of a Continuous Flow analysis (CFA) system has been developed and tested in Greenland field conditions. The box is developed for investigating surface variability of volcanic eruptions, forest fires and accumulation. The box is currently equipped with a conductivity sensor (volcanoes), and two florescence detectors. This project is on further making the box suitable for insoluble dust particles, as well as on improving the depth registration. The project offers extensive laboratory work, data analysis and interpretation and dependent on timing possibly field work in Greenland.
Contact: Helle Kjær.
Climate chemistry record from Central Greenland ice cores
The central Greenland ice cores cover a time period reaching back to the last glacial and a number of chemical impurities, socalled proxies, have been measured within these ice cores by means of continuous flow analysis (CFA) or ion chromatography. These proxies include Dust particles originating from distant deserts; Sodium and chloride for sea salt, which relates to sea ice and wind speed; Ammonium and formate which are indicators of forest fires; Acidity, Fluoride and sulphate which relate to volcanic eruptions; Bromide, a new proxy for sea ice.
Projects within the chemical impurity group at PICE include the analysis and climatic interpretation of these proxies. Please pass by Helle Kjærs office on the third floor and discuss options for a potential student project.
Global volcanism of the last glacial period (60, 30, 15 ECTS)
Volcanism has significant impact on climate and volcanic records are used to force climate models together with orbital forcing, greenhouse gasses etc. Using existing acidity records from Greenland and Antarctic ice cores we are currently mapping out the magnitude and frequency of large volcanic eruptions occurring during the last glacial period (11-115 ka BP). Student projects related to this topic could involve quantification of the deposition of sulfate and chloride on the ice sheets, the frequency and duration of past eruptions based on ice core records, estimates of the climatic impact of the eruptions, or attempts to correlate the major eruptions seen in the ice to well-known pre-historical eruptions. It is also possible to work on tephra particles from the ice cores that are applied to identify the source of eruptions. The projects typically involve some programing for manipulation of large datasets.
Contact: Anders Svensson