Master thesis projects at Centre for Ice and Climate
Do your Master Thesis Project at Centre for Ice and Climate. In the Ice and Climate group we work on analyzing past climate variability by means of ice core analysis. As a Master student at Centre for Ice and Climate, you will work in an active and dynamic group on a real research project.
We offer both 6-month and 12-month projects.
Below you can find thesis project suggestions. You are also very welcome to come by the centre and ask the researchers for further options or present your own idea that we can develop together.
You are also welcome to contact the centre to hear more about the options to do your bachelor projekt in the group.
Water isotope group
Greenland past temperatures from volcanic eruptions and high resolution water isotope data - A new tool?
In this project you will have the chance to work with an array of high quality - high resolution water isotope data from the Greenland Ice Sheet in order to estimate past temperatures. You will combine the information stored in the water isotope time series with information from past volcanic eruptions from Iceland and the tropics in a novel way that has not been attempted before and has potential to yield data-based, past-temperatures spatial maps for the Greenland Ice Sheet.
- Familiarity with scripting/numerical programming - Preferably good skills in Python.
- Some previous experience with time series and spectral analysis will be a plus.
What you can expect:
- You will be part of a very dynamic group at the Center for Ice and Climate and meet colleagues with a very broad range of backgrounds.
- You will sharpen your Python coding and data analysis skills.
- You will get hands-on experience with the Community Firn Model, a suite of python implementations of densification models for polar firn and ice that has recently been extended to include water isotope diffusion processes.
Contact: Vasileios Gkinis
The CFA group
MSc and BSc projects in Continuous Flow Analysis (CFA).
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.
1) 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.
2) Climate chemistry record from Central Greenland ice cores
The goal of this project is to measure climate proxies in ice core samples. The project involves learning Ion Chromatography techniques, and filling in a crucial gap in the knowledge of the past 10 thousand years’ climate. The Ion Chromatograph measures several ion species that can provide information on the climate of the past; eg. Chlorine for sea salt, which relates to sea ice and wind speed, Fluoride and sulphate which relate to volcanic eruptions and Bromide which is a new proxy for sea ice.
3) Volcanic events, Desert dust and other climate proxies in the Antarctic Mt Brown South ice core
A 295 m ice core from Mt Brown South in coastal East Antarctica was drilled in 2017/8 and will be analysed at University of Copenhagen in late 2018. The core records the past 1000 years of Antarctic climate variability. Multiple MSc projects are available to study proxy records to be measured in the Mt Brown ice core. 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. MSc projects will include participating in CFA and Ion Chromatograph measurement campaigns, conducting continuous measurements of chemical impurities in the ice, data analysis and interpretation. The climate data will complement a network of other Antarctic and Greenland ice cores.
Atmospheric Hydrogen as a new climatic parameter
We know much about the past atmosphere; E.g. the pace at which greenhouse gas concentrations have varied in the past. Our knowledge stems from the air trapped in ice cores. Interwoven with CH4 and CO are production and destruction processes of molecular hydrogen. Hydrogen thus offers complementary information on important components of the chemistry in our atmosphere. To our knowledge neither concentration nor isotope records of molecular hydrogen exist prior to 1993 (2). Our final goal is to extend this record based on ice core measurements. However, several aspects of such an endeavor are unclear. 1) Due to the small molecule size of H2 it is expected that hydrogen is lost after recovery of the ice core. 2) Hydrogen may fractionate during the last step of air occlusion in the ice. Both aspects need clarification. The master thesis has two aspects 1) Measure the permeability of molecular hydrogen through natural ice. 2) Investigate the potential fractionation during air occlusion in polar firn. For the measurement a system needs to be designed and built. Our current deep drill project EGRIP (http://eastgrip.org) offers access to freshly drilled core to investigate above mentioned questions.
Oxygen isotopes (of atmospheric oxygen)
Ice from the bottom of the Greenland ice sheet is difficult to date as it is often disconnected from the continuous climate record above. However, it would be very important to know where Greenland was glaciated in earlier warm periods to get better projections into the future (e.g. Figure 0.1). The changes in the oxygen isotopes of O2 can be used to date Greenland ice core sections by matching them to their well dated Antarctic counterparts. http://www.iceandclimate.nbi.ku.dk/about_centre/history/ The project focuses on measurements of the deep sections of ice cores in our archive and dating those sections. The focus will be on the historic Camp Century core (http://www.iceandclimate.nbi.ku.dk/about_centre/history/). The project is available immediately.
CO2 in the ancient atmosphere
Reconstructions of atmospheric CO2 concentrations revealed significant changes on glacial-interglacial time scale but also on shorter intervals like over the present warm period. Concentration measurements do not give any information about the processes responsible for these changes in CO2 concentrations. Here the isotopes of carbon have been proven to be useful. The carbon isotope signatures of the major carbon reservoirs (ocean, biosphere, sediments and atmosphere) diver. Therefore the d13C of CO2 in combination with its concentration reveals variations in the C fluxes between those reservoirs. We have a working system to measure concentration and isotopic composition of CO2 extracted from ancient air trapped in the polar ice sheets. In the frame of collaborative ice core drilling projects in Antarctica samples need to be measured and interpreted. This will be the topic of a master project that is available immediately.
Methane and the clathrate gun hypothesis of fast climate change
Enormous amounts of CH4 are sitting on the ocean floor in the form of methane hydrates (also called clathrates). Clathrates are cages formed by water molecules where gas molecules are trapped in the hollow space inside the cage. This symbiotic structure is stable at low temperature/ high pressure. The clathrate gun hypothesis speculates that a spontaneous release of methane from clathrates increases the atmospheric methane composition to the degree where the boosted greenhouse effect triggers climate change. So far we have not found any sign of such catastrophic events occurring. However, it is speculated that less dramatic release from clathrates might happen during times of rapid climate change. Such events are hard to catch due to the short lifetime of CH4 in the atmosphere. Atmospheric CH4 originating from clathrates has a distinct isotopic composition of hydrogen. So far we are able to measure the carbon isotopic composition. The master thesis project involves extending our measurement capacities to isotopes of hydrogen, testing the new system, and performing first measurements over a climatologically interesting time period. This is a 12 month project.
EGRIP project: The ice crystals
When snow is compressed to ice, crystals are formed with nearly random orientation. As the ice is further compressed and moves down in the ice sheet the ice crystals grow and the crystal orientation is influenced by ice deformation. The aim of this project is to measure the crystal size and orientation with depth. The results can be used to understand and develop anisotopic deformation laws for ice. The Master project is within climate research and has the potential to lead to cutting edge ice core research and will include periods of measurements at the Alfred-Wegener Institute in Bremerhaven, Germany.
Ice flow modelling
1) Observation and modelling of ice flow in the Northeast Greenland Ice Stream (NEGIS)
Satellite and in-situ observations of surface elevation and velocity at EGRIP inform of the fast ice stream flow. In connection to the study of the NEGIS ice stream we plan high resolution surface elevation mapping using drone, rover and GPS stakes. We also have developed software (IMGraft) to download satellite data to map the surface velocities. Master projects in relation to this research can contain a mixture of experimental work on ice stream flow and ice flow modelling.
2) Measuring ice flow from space
In this project you will use satellite imagery to quantify ice flow, and how it changes over time. There are many possible options concerning study region. The project will be using the ImGRAFT open-source toolbox.
Contact: Aslak Grinsted
3) Extreme coastal storms in a changing climate
The St. Petersburg Flood of 1824 In this project you will build empirical models of storm surge threat. The aim is to quantify how storm surge threat has changed over time, and whether we can find predictable behaviour. The study can both be global or local in scope. You may also contact me if you are interested in the empirical modelling other types of extreme weather events (hurricane winds/ extreme rain).
Contact: Aslak Grinsted
The Atlantic Meridional Overturning Circulation is the name for a whole zoo of ocean processes that carry heat from the Gulf of Mexico to Scandinavia. The physical oceanographers at Team Ocean/NBI use computer models of the ocean circulation to investigate these processes, and a MSc thesis in our team will typically focus on theories of ocean circulation and numerical simulations of climate. Our work is based in theories and numerical simulations of ocean circulation. If you have a strong background in physics and mathematics we would very much like to talk to you, and together we can find an ocean-physics based project to work on. We use ultra-high resolution models of the global ocean circulation (see picture) to understand the driving forces behind major ocean currents, and their variability. Thesis topics are taylored to match students' interest and Team Ocean's current focus, but they will all involve High Performance Computing and Big Data.
More information can be found on our website: http://www.nbi.ku.dk/english/research/Geophysics/Meteorology_Oceanography_and_Geodesy/
Contact: Markus Jochum