2020 Arctic

Greenland: Climate Drivers and Ancient History in Greenland Ice

Using the Foro 400 Drill, this project will drill a 400-450 meter long ice core from the Tunu region of northeast Greenland and analyze the core for a broad range of elements, chemical species, and isotopes to reconstruct climate and human impacts during the past ~4000 years. An ice-penetrating radar survey extending 40-km upstream along the ice-flow line upstream of the ice-core site will support interpretation of the aerosol and water isotope records, as well as understanding of any possible impacts from changes in deposition processes upstream. The goal of this research is to develop accurately dated, high-resolution, ice-core records of a broad range of elements and chemical species to expand and extend recently identified, causal linkages between (1) ancient societies; (2) volcanism and hydroclimate; and (3) wars, plagues, social unrest, and economic activity.

Greenland: Quantifying Heat/Mass Structure and Fluxes through the Full Thickness of Greenland's Percolation Zone

The goal of the project is to quantify the structure, thermal state, and heat fluxes through the full thickness of the firn column across a transect spanning western Greenland's percolation zone. The project will achieve these objectives by drilling a combination of shallow and deep cores/boreholes at a series of sites between Swiss Camp and Crawford Point. Deep (up to 100 meters) boreholes will be drilled using hot water methods via with a drill that is being developed by the investigators. These deep boreholes will be augmented with a number of shallow cores to quantify density and provide access for temperature logging of the shallow firn thickness. The shallow cores will be drilled with an IDDO Hand Auger and Sidewinder.

North America: Sediment Transport Mechanisms and Geomorphic Processes Associated with Shore Ice along Cold Climate Coastlines

This project will test the hypothesis that limited or variable shore ice cover, when compared to consistent shore ice cover, results in enhanced storm-induced coastal erosion and damage to coastal infrastructure. Cold climate coastlines are highly vulnerable to reduced winter ice cover in response to climate change. The dynamics of how reduced ice cover influences coastal evolution is poorly understood which inhibits accurate forecasting of future coastal response in cold climates. Researchers on this project hope to improve our understanding of how sediment interacts with shore ice as well as the resulting coastal landscape change. The first part of the project involves laboratory experiments aimed at studying the physics of sediment and ice interactions. The second part of the project will gather field measurements that use the laboratory measurements as a basis to investigate how cold climate coastlines naturally respond to the shore ice. Using a SIPRE Hand Auger, the researchers will collect ice core samples of 1-3 meters in length on Lake Michigan and Lake Superior to inspect debris entrained within the ice for comparison with the laboratory experiments. This research will result in a model that will help explain how reduced and variable winter shore ice cover alters the coastal landscape, which will help coastal managers proactively plan for future climate change impacts.

North America: The Ecosystem Ecology of Lake Ice Loss in North-Temperate Lakes

This research advances the growing field of winter limnology by using long-term data collected on northern lakes in Wisconsin in conjunction with a snow-removal experiment to look at under-ice algae and the implications for ice-loss on spring algae blooms. Using an IDDO Hand Auger, the researchers will collect lake ice cores through an ice thickness of up to one meter to study the biogeochemistry and habitat of lake ice.