Tasman Sea

The Tasman Sea is a big sea. It sits between Australia and New Zealand. The water is very wide.

Many fish live in the deep sea. One ship found 500 kinds of fish. They also found a tooth from a giant shark. Long ago, people used a cable to send messages. Now, people fly planes over the waves. It is a busy and grand place.

The Tasman Sea is a large sea in the South Pacific Ocean. It sits between Australia and New Zealand. To the north is the Coral Sea. To the east is the Pacific Ocean. People in Australia and New Zealand sometimes call it "The Ditch."

Long ago, a Dutch explorer named Abel Tasman crossed this sea. Later, James Cook sailed through it too. The Māori people call it Te Moana-a-Rehua. This means "the sea of Rehua."

Deep under the water, the sea floor is made of ooze. This is soft, fine mud. A research ship found many living things here. They found 500 kinds of fish. They also found 1,300 kinds of invertebrates, which are animals without backbones. Researchers even found a tooth from a megalodon. This was a very large shark that is now extinct.

Smoke from fires can even drift over the sea. The sea has many currents. One is the East Australian Current. It moves warm water from the tropics toward the south. This helps move heat through the ocean.

The Tasman Sea is a huge part of the South Pacific Ocean. It sits right between Australia and New Zealand. To the north, you will find the Coral Sea. The Pacific Ocean lies to the east and northeast. To the south and southeast is the Southern Ocean. People in Australia and New Zealand sometimes call it "The Ditch." This sea is very wide and covers a large area. It is a vital part of the ocean world.

Many things happen deep under the waves. The bottom of the sea is made of soft ooze. Some of it is called globigerina ooze. Other parts have pteropod ooze or siliceous ooze.

Powerful currents also move through the water. The East Australian Current is a very strong feature. It carries warm water from the tropics toward the south. This helps move heat through the ocean. This current even sends small swirls of water toward the Indian Ocean.

History tells us about the people who traveled here. A Dutch explorer named Abel Tasman crossed it in 1642. He was the first known European to do so. Later, Lieutenant James Cook sailed here in the 1770s. The Māori people have their own name for it. They call it Te Moana-a-Rehua. This means "the sea of Rehua." This name is different from names used for other Pacific waters. It shows how much people respect this sea.

People have used the sea for many different jobs. In 1876, workers laid a telegraph cable under the water. This helped Australia and New Zealand talk to each other. Later, a telephone cable was finished in 1963. People also tried to fly over the sea. Charles Kingsford Smith and Charles Ulm made the first successful flight in 1928. Some people even rowed across it alone. Colin Quincey did this in 1977, and his son Shaun did it in 2010.

Life in the Tasman Sea is very busy. A research ship called the RV Tangaroa explored the deep parts. They found 500 different kinds of fish living there. They also found 1,300 kinds of invertebrates. These are animals without backbones. Researchers even found a tooth from a megalodon. This was a huge shark that is now extinct. The sea is a home for many amazing living things.

The Tasman Sea is a marginal sea within the South Pacific Ocean. It sits between the landmasses of Australia and New Zealand. To its north lies the Coral Sea. The Pacific Ocean borders it to the northeast and east. The Cook Strait is to its east, while the Southern Ocean lies to the south and southeast. To the west, the sea is bounded by the Bass Strait. This large body of water is an essential part of the ocean system in the southwestern Pacific.

Geologically, the sea has a complex history. A midocean ridge exists roughly midway between the continental margins of Australia and Zealandia. This ridge developed between 85 and 55 million years ago. It formed during the breakup of the supercontinent Gondwana. During this time, Australia and Zealandia began to move apart. Because much of Zealandia is submerged, the ridge runs closer to the Australian coast than to New Zealand. This underwater mountain range is a key feature of the sea's floor.

The seafloor itself is composed of various types of sediment known as ooze. Much of the base consists of globigerina ooze. In certain areas, different types of sediment appear. A small zone of pteropod ooze is found south of New Caledonia. Additionally, siliceous ooze can be found to the southern extent of 30°S. These fine sediments settle over vast periods of time. They help scientists understand the history of the ocean floor.

Ocean currents drive much of the activity in the Tasman Sea. The East Australian Current is the most energetic circulation feature in the region. It begins its southward flow in the tropics of the Coral Sea near the eastern coast of Australia. This current is a return of the westward-flowing Pacific South Equatorial Current. It acts as a primary means of heat transport from the tropics to the middle latitudes. As it moves south, it can split into different branches. One branch, called the Tasman Front, flows toward the north of New Zealand. The presence of the New Zealand land mass helps define how far south this branch can split.

Other currents also shape the local waters. The East Auckland Current moves down the west coast of the North Island. Further south, the East Cape Current flows toward the South Island. This happens because of the shapes of the Lord Howe Rise and the southern east coast of the North Island. South of Tasmania, the East Australian Current is diverted west into the Subtropical Front. Here, it collides with the western-moving Subantarctic front of the Antarctic Circumpolar Current. The current also sheds eddies, which are swirling masses of water. Some of these, known as Tasman Leakage, move as far west as the Indian Ocean.

Weather patterns also influence the sea. In the south, depressions move from west to east. The northern limit for these westerly winds is near 40°S. During the southern winter, which lasts from April to October, these winds change direction. The northern branch of the westerly winds moves toward the north and meets trade winds. This results in frequent winds from the southwest. In the Australian summer, from November to March, the southern branch of the trade winds meets west winds. This interaction produces significant wind activity across the area.

Human history in the Tasman Sea is long and varied. The Māori people call the sea Te Moana-a-Rehua, meaning "the sea of Rehua." This name differs from the name used for Pacific waters at Cape Reinga, which is Te Tai-o-Whitirea. European exploration included Abel Janszoon Tasman, who was the first known European to cross it in 1642. Later, Lieutenant James Cook navigated the sea extensively during the 1770s. In 1876, the first telegraph cable was laid to connect Australia and New Zealand. This was later replaced by the Commonwealth Pacific Cable in 1963, which was a telephone cable.

Adventure and science have also defined the region. In 1928, Moncrieff and Hood attempted a trans-Tasman flight but were never seen again. Later that year, Charles Kingsford Smith and Charles Ulm completed the first successful flight. Solo rowing crossings were also achieved by Colin Quincey in 1977 and his son Shaun Quincey in 2010. Biological research has revealed a rich ecosystem. The research ship RV Tangaroa discovered 500 species of fish and 1,300 species of invertebrates. Researchers even found a tooth from the extinct megalodon shark. The sea contains several midsea island groups, including Lord Howe Island and Ball's Pyramid.