Greenland Sea

The Greenland Sea is a massive body of water located in the high latitudes of the North.

It sits between several major landmasses and islands. To the west, the sea borders the large island of Greenland. To the east, it meets the Svalbard archipelago, which is part of Norway. To the south, the sea is bounded by Iceland and the Jan Mayen island. The northern edge connects to the Arctic Ocean through the Fram Strait. Because of its location, people define its boundaries in different ways. Some call it part of the Arctic Ocean, while others see it as part of the Atlantic Ocean. Oceanographers often group it with the Norwegian Sea as part of the Nordic Seas.

This sea acts as a vital connection between the Arctic and Atlantic oceans. The water moves through a complex system of currents that drive global patterns. Along the western side, the cold East Greenland Current flows southward. This current is a key part of the Atlantic conveyor belt. On the eastern side, the warm Spitsbergen Current flows northward. This current is a branch of the Gulf Stream. Where these two currents meet, they create a counter-clockwise flow in the center of the sea. This mixing of cold, fresh water and warm, salty water is very important. It can influence the thermohaline circulation, which is the global system of deep-ocean currents.

The physical shape of the sea floor is also quite complex. The bottom of the Greenland Sea is a large depression. It is bounded by underwater ridges, such as the Mohns Ridge and the Knipovich Ridge. These ridges are part of the Mid-Atlantic Ridge system. To the west, the sea floor rises quickly toward the Greenland coast. The depths vary greatly across the region. While much of the sea is shallower, the Fram Strait reaches much deeper. There, the water reaches the Molloy Deep, which is a very profound part of the ocean. Silts, gravel, and boulders cover the various shelves and ridges on the bottom.

Ice is a defining feature of the Greenland Sea's environment.

There are three main types of floating ice found here. The first is Arctic pack ice, which can be several meters thick. The second is sea ice, which is usually about one meter thick. The third type is freshwater icebergs. In the winter, a specific area called the West Ice forms north of Iceland. This ice forms between Greenland and Jan Mayen island.

Historically, a feature called the Odden ice tongue was very important. It was a massive area of ice that extended from the East Greenland ice edge. As ice formed, it rejected salt back into the ocean. This made the surface water denser, causing it to sink and drive ocean currents. Since the 1990s, the Odden has rarely developed.

The climate in the Greenland Sea is strictly Arctic. Temperatures are very low and change depending on the season and location. In the north, surface water temperatures are often 0°C or even lower. The summer season is quite short. In the north, there are only about 225 days when temperatures rise above 0°C. In the south, that number can be as high as 334 days. Frequent fogs, strong winds, and moving ice make navigation difficult. Because of these conditions, there is only a narrow window for commercial ships. The ice season typically starts in October and does not end until August.

Many different species rely on the Greenland Sea for survival.

Small organisms and invertebrates form the base of the food chain. Larger animals like cod, herring, and halibut feed on these smaller creatures. The sea is also a major breeding ground for seals. Harp seals, hooded seals, and gray seals use the West Ice for this purpose. Whales also have a long history in these waters. For 300 years, the whaling industry used the sea as a hunting ground. This industry was so intense that it depleted the whale populations by 1911. However, scientists have seen signs of hope recently. Since the late 1990s, the bowhead whale population has shown signs of recovery. This species once had an estimated population of 52,000 whales.

Human exploration of the Greenland Sea has grown over many centuries.

While people have known about the sea for millennia, scientific study is more recent. In 1765 and 1766, Russian expeditions led by Admiral V. Chichagov conducted early observations. They studied currents, ice drift, and took soil samples. Later, the Norwegian North-Atlantic Expedition explored the area between 1876 and 1878. In 1909, the scientist Fridtjof Nansen described the complex current systems. Even in modern times, people continue to test their limits here. In 2017, a rowing expedition named Polar Row completed the first full man-powered crossing of the sea.