Overview
Researchers have established a new methodology to assess the extent of the Marginal Ice Zone (MIZ) surrounding Antarctica. This approach leverages existing satellite radar techniques to provide the first measurements of this region. The Antarctic MIZ represents the peripheral area of the sea ice, characterized by a width of nearly 200 kilometers and composed of ice floes that interact with waves from the Southern Ocean.
Research Context
The Marginal Ice Zone around Antarctica is identified as an understudied component of the Antarctic sea-ice system. This region is significantly influenced by waves originating from the Southern Ocean. The description characterizes the Southern Ocean as "extremely rough," impacting the ice floes within the MIZ. The MIZ itself is described as forming a ring, approximately 200 kilometers wide, at the outer edge of the sea ice.
Approach
The research involved the development of a new measurement technique. This technique utilizes "old satellite radar techniques." The application of these techniques enabled scientists to quantify the true extent of the Antarctic MIZ, a measurement previously unavailable. The methodology focused on the identification and measurement of the sea-ice region affected by ocean waves.
Findings
The primary finding is the successful development and application of a new method for measuring the extent of the Antarctic MIZ. This method allowed for the first-time quantification of this specific sea-ice region. The MIZ is observed to be an approximately 200-kilometer-wide ring of ice floes that are affected by waves emanating from the Southern Ocean.