James: The Albedo Effect

Before leaving on the expedition, our intrepid student explorer, James, met with students from Milton Academy. Together they reviewed projects that aligned with the expedition’s scientific goals and selected one that studied the albedo (or reflectivity) of various materials found in a sample area of the Ngozumpa glacier. Below, James describes his experience of collecting this data.

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One day on the trip, we used the field spectrometer, which is a tool that measures albedo. Albedo is the scientific term used to describe the reflectivity of a surface. The field spectrometer is a backpack that you wear and it has a pistol grip fiber optic lens that you point at the ground to measure the albedo. The backpack itself weighs about 20 pounds but the way it is built it is pretty uncomfortable to wear.

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The way we use the machine is pretty simple: we walked transects of about 100 feet and every ten paces we would stop and initialize the machine. When we took a reading I would press a button on the laptop strapped to my chest and then the fiber optic lens would take ten readings and average them. When the machine finished collecting data I would move on another ten paces and repeat the process. The transect went over various types materials including ice, snow and loose rubble.

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After about an hour we completed the transect and headed inside. It was such cool experience using such advanced scientific tools, not only because the device looked like one of the Ghostbuster backpacks. The data I collected is being sent back to Milton Academy so the students I collaborated with can use it in their studies.

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