NWT RESEARCH DATABASE

Regions: Inuvialuit Settlement Region

Tags: physical sciences, climate change, glaciology, water balance, snow water equivalence

Objective(s): To provide both a science based knowledge pertaining to the patterns and rates of climate change, and a quantitative basis for estimating Canada’s contributions to global sea-level rise.

Project Description: This licence has been issued for the scientific research application No.4618. The objectives of this integrated monitoring and research project is to provide 1) science based knowledge pertaining to the patterns and rates of climate change, and 2) a quantitative basis for estimating Canada’s contributions to global sea-level rise. Glacier mass balance is defined as the difference between the amount of snow accumulated on a glacier (generally termed winter balance) and the amount lost due to melt (summer balance) over the course of a given year. Due to logistical constraints however, measurements of the high Arctic glaciers are limited to one spring visit per year. Hence winter balance is measured directly from mass balance poles drilled into the ice the previous spring, while summer balance is inferred from both pole measurements and meteorological data recorded at 11 automatic weather stations deployed across the high Arctic monitoring network. The mass balance pole arrays at each monitoring site span the full elevation range of the glacier basin or small ice caps being measured. In this project, mass balance is measured at each pole as function of snow depth and density (winter balance) and pole height difference over 2 successive visits, or 1year (net balance). Observations at each pole are augmented with hourly temperature and snow pack/ ice height measurements collected from the automatic weather stations. Mass balance data is extrapolated across elevation bands in order to quantify the net annual mass balance at the basin- or ice-cap wide scale. The field crews communicate with Polar Continental Shelf Program via two-way radio or Iridium satellite phone two times daily (7.30 and 19.00) to inform of status. Results will communicated to individual communities via direct reporting through fax to the Hunters and Trappers Committees of Ulukhaktok and Sachs Harbour. Plain language reports will also be submitted annually to the Aurora Research Institute, which reach the broader scientific and public audience. The fieldwork for this study will be conducted from April 3, 2020 to May 1, 2020.