Answer:
To determine whether the Lomonosov Ridge is joined to the Canadian/Greenland continental shelf.
Explanation:
The reason that the researchers from Denmark and Greenland are setting off explosions in the arctic is because of the Lomonosov Ridge which lies between Canada and Russia and is 1800 kilometers long. Their aim is to determine the exact geographical layout of the ridge, its properties and because of the oil and energy that is found in the arctic, it is important to determine who owns which part of the area.
I hope this answer helps.