Please login if you have access to particular applications.
Project details
| Title: | Heat flow in the Cook glacier region |
| Id: | 2662 |
| Investigator(s): | Joanne Whittaker
University of Tasmania [details] |
| Description: | The deep, geological component of heat flux, can significantly influences subglacial hydrology, basal melting, and ice flow dynamics, thereby affecting the glacier’s stability and its potential contribution to sea-level rise. This project aims to measure GHF distribution, variability, and overall level in the Cook region. During this voyage we will recover sub-seafloor temperature measurements, and sediment thermal conductivity measurements that together will measure geothermal heat flux (GHF) in the marine area offshore Cook Glacier. The GHF measurements will enable an understanding of oceanographic conditions (measurements from the upper 3-4 m of sediment), and geological heat coming from the deep Earth (measurements from >4 m). Planned Activity: We will deploy MTPs on all sediment corer deployments (Kasten, Piston, Multi) to collect in situ temperature measurements from the seafloor sediments offshore Cook Glacier. Thermal conductivity measurements will be taken on cores sampled at sea. Metadata including water depth, wire out, core length, and sediment characteristics will be recorded to support data interpretation. Kasten corer clamps are already manufactured and tested. Piston corer clamps will be available for and tested on this voyage. Piston core sensors will collect more reliable data due to the larger depth interval covered. Multicore sensors can collect bottom water temperature. |
| Years: | 2026 |
List of surveys that this project was on.
Use [details] link to view survey details (map, reports, metadata etc) including links to download data.
| Survey | Investigator | Description |
|---|---|---|
| IN2026_V01 [details] |
Dr Linda Armbrecht | This study has three major objectives: a) to characterise marine ecosystem composition of the Cook Glacier marine region throughout the past and into the present, focussing on warming periods throughout the last 1 million years, b) assess relationships of benthic biodiversity and population genetic signatures with productivity and ice-sheet history, and c) determine the geological and palaeoceanographic conditions that may have influenced the spatial distribution of the Cook region marine life. To achieve these objectives, we will collect bathymetry (multibeam) and sub-bottom profile data (PIs De Santis and Post), sediment cores (Multi-, Kasten, Piston Cores) for sedimentological, geochemical, paleontological and genomics investigations (PIs Armbrecht, Noble, Cordier, Leventer), imagery of seafloor biodiversity (deep-towed camera; PIs Hill and Jansen), benthic organisms (NIWA Sled; PI Strugnell), and physical (CTD, ADCP, Argo floats; PI Silvano), chemical (Trace Metal Rosette; PI Noble) and biological oceanography (CTD, underway seawater sampling) (PIs Focardi, Suter, Leventer, Noble). Due to the likely presence of sea-ice in the study area (monitored remotely by PI Lieser throughout the voyage), we will sample in our priority survey area, in front of the Cook Glacier, immediately at the beginning (January) or midway through (February) the voyage. |