Explanation:

All the three mechanisms influence global climate.

The Arctic influences global climate through three major feedback mechanisms, all of which could be affected by global warming. These mechanisms involve the reflection of sunlight, ocean currents, and greenhouse gas releases.
The first feedback involves the snow and ice that cover much of the Arctic. Because they are bright white, snow and ice reflect most of the solar energy that reaches the surface back to space. This is one reason why the Arctic remains so cold. As greenhouse gas concentrations rise and warm the lower atmosphere, snow and ice begin to form later in the autumn and melt earlier in the spring. The melting back of the snow and ice reveals the land and water surfaces beneath, which are much darker, and thus absorb more of the sun's energy. This warms the surface further, causing faster melting, which in turn causes more warming, and so on, creating a self-reinforcing cycle by which global warming feeds on itself, amplifying and accelerating the warming trend. This process is already underway in the Arctic with the widespread retreat of glaciers, snow cover, and sea ice. This is one reason why climate change is more rapid in the Arctic than elsewhere. This regional warming also accelerates warming at the global scale.

Ocean circulation patterns - One of the ways the sun's energy is transported from the equator toward the poles is through the globally interconnected movement of ocean waters (see page 32) primarily driven by differences in heat and salt content, known as the thermohaline circulation (“thermo” for heat and “haline” for salt).
At present, the northward extension of the warm Gulf Stream current in the North Atlantic Ocean warms the winds and provides much of the moisture that falls as precipitation over northwestern Europe. As the waters move northward, they become cooler and denser, until they are heavier than the waters below and sink deep into the ocean. This sinking occurs particularly in the seas making up the northern North Atlantic Ocean, and in the Labrador Sea, driving the global thermohaline circulation (sometimes referred to as the “conveyor belt”). This sinking of dense seawater pulls more warm waters northward, helping to provide the heat that keeps Europe warmer in winter than regions of North America that are at the same latitude.