An underwater research probe contains a sealable chamber with a piston. A marine engineer investigates the relationship between the pressure and volume of a fixed mass of gas at a constant deep-ocean temperature of 4 ∘C4\ ^\circ\text{C}4 ∘C. The baseline results are plotted on the graph below.
The engineer repeats the experiment with the same mass of gas at a shallower depth where the ambient temperature is a constant 20 ∘C20\ ^\circ\text{C}20 ∘C.
Describe how the curve on the graph would change under these new conditions.