Bridging the Gap: Why a Plane is Essential for Tracking Melting Ice

NASA | From the Cockpit: The Best of IceBridge Arctic '13 · 4:25 · Video: NASA Goddard · Watch at the source

In short: When satellites stop speaking, the data on our melting world can go silent. NASA's IceBridge mission uses a specialized aircraft to fill a critical observational void, capturing a three-dimensional view of polar ice that space-based sensors alone cannot provide.

The IceBridge mission represents the largest airborne survey of Earth's polar ice ever conducted. While satellites like ICESat provide a broad orbital perspective, they have limitations in continuity. For instance, ICESat ceased collecting science data in 2009. To prevent a gap in our understanding of rapidly changing polar features, NASA deployed the IceBridge campaign to provide a yearly, multi-instrument look at the Arctic and Antarctic.

The mission utilizes a P-3B aircraft equipped with forward and nadir cameras, as well as radar and laser altimetry. These tools allow scientists to map ice sheets, glaciers, and sea ice in three dimensions. By flying these missions annually, researchers can track the behavior of Greenland and Antarctic ice with higher precision than many other methods allow. The first flights were conducted in 2009, with spring deployments over Greenland and autumn flights over Antarctica.

The ultimate goal of IceBridge is to bridge the gap between two major satellite eras. It serves as a vital link between the ICESat, which has been in orbit since 2003, and the planned ICESat-2. By providing consistent, high-resolution data during this transition, IceBridge ensures that scientists maintain a continuous series of observations to monitor the health of our planet's polar regions.

This airborne approach is not just about scenery; it is about data density. By combining various instruments on a single aircraft, the mission captures a comprehensive snapshot of the ice's behavior. This multi-instrument strategy is essential for understanding the complex dynamics of ice shelves and sea ice in a changing climate.

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