Lexi Webster
The East Australian Current (EAC) is a warm, southward, western boundary current that flows along the east coast of Australia. It is notably featured in the 2003 Disney•Pixar animated film Finding Nemo, where Marlin and Dory encounter Crush, a sea turtle, and his son Squirt, who help them navigate the current to reach Sydney Harbour and find Nemo. While the film portrays the EAC as a narrow jet, the actual current is much bigger and wilder, transporting 40 million cubic meters of water southward each second. It plays a crucial role in the east-coast climate and ecosystems of Australia and has become a well-known feature for many children and parents due to its depiction in the movie.
| Characteristics | Values |
|---|---|
| Flow direction | North to South |
| Flow rate | 40 million cubic meters per second |
| Width | 100 km |
| Depth | 1.5 km |
| Flow speed | 7 km/hr |
| Maximum velocity | 90 cm/s |
| Water temperature | Warm |
| Nutrient level | Nutrient-poor |
| Animals transported | Sea turtles, tunas, groupers, swordfish, lobsters, dolphins, albatrosses |
| Appearances in Finding Nemo | Marlin and Dory meet Crush, Squirt, and other sea turtles on their way to find Nemo |
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What You'll Learn
The East Australian Current (EAC) is a real ocean current
The East Australian Current (EAC) is indeed a real ocean current. It is a boundary current that flows along the east coast of Australia, from the Great Barrier Reef in the north to Sydney in the south. The EAC is formed from the South Equatorial Current (SEC) crossing the Coral Sea and reaching the eastern coast of Australia. At around 15° S near the Australian coast, the SEC divides, forming the southward flow of the EAC.
The EAC is not the fast-flowing warp-tube that is portrayed in the movie "Finding Nemo". In reality, it is much bigger and wilder, transporting a staggering 40 million cubic meters of water southward each second. That is the equivalent of 16,000 Olympic swimming pools flowing along the Australian coastline every second. The current is almost 100 kilometers wide and more than 1.5 kilometers deep, more like a ribbon than a tube.
In the movie "Finding Nemo," Marlin and Dory hitch a ride on the EAC on their way to find Nemo and reunite him with his father. They encounter a group of sea turtles, including Crush and Squirt, who are traveling inside the current. The EAC is portrayed as a narrow jet that the characters can easily jump in and out of, but in reality, it is a powerful and dynamic force of nature that plays a crucial role in the east-coast climate and ecosystems of Australia.
The EAC also has a significant impact on the Sydney to Hobart yacht race, with the eddies and strength of the current worth millions of dollars to racers each year. Additionally, the EAC transports marine species southward, carrying tropical fish and other marine life to subtropical latitudes. Climate change is already affecting the EAC, with the waters south of Sydney warming up faster than most of the rest of the ocean. This warming is expected to continue, with the current likely getting faster and stronger, which will further impact the marine life and ecosystems in the region.
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EAC's role in the film is exaggerated
The East Australian Current (EAC) is a warm, southward, western boundary current formed from the South Equatorial Current crossing the Coral Sea and reaching the eastern coast of Australia. It is the largest ocean current close to the shores of Australia. The EAC plays a crucial role in the east-coast climate and ecosystems of Australia.
In the 2003 animated film Finding Nemo, Marlin and Dory encounter the EAC in their search for Nemo. They meet Crush, a sea turtle, and his son Squirt, who are travelling inside the current. Crush tells Marlin and Dory that they are at the right spot to get to Sydney, and Squirt pushes them off the EAC to continue their journey.
While the film accurately portrays the EAC as flowing along the East coast of Australia and southward from the Great Barrier Reef, it exaggerates certain aspects of the current. In the movie, the EAC is depicted as a narrow jet that characters can easily jump in and out of, when in reality, the EAC is much bigger and wilder, spanning almost 100km in width and over 1.5km in depth. It transports an immense volume of water, equivalent to 16,000 Olympic swimming pools every second.
The film also portrays the EAC as a fast-flowing warp-tube, which, while exciting, is not entirely accurate. The EAC is even more impressive, with speeds in its core reaching up to 7km per hour and playing a significant role in the Sydney to Hobart yacht race. The depiction of the EAC as a thrilling ride adds drama and excitement to the film, but it is important to remember that the true nature of the current is even more fascinating and impactful on the region's climate and ecosystems.
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EAC's impact on the Sydney to Hobart yacht race
The Sydney to Hobart Yacht Race is one of the top three offshore yacht races in the world, attracting maxi yachts from across the globe. The race covers 630 miles from Sydney down the NSW coast, crossing the Bass Strait, continuing south along the Tasmanian East Coast, and finishing in Hobart.
The East Australian Current (EAC) is a large-scale ocean boundary current that flows down the east coast of Australia. It starts north of Brisbane and can reach as far south as the Tasman Peninsula, flowing at speeds of up to 4 knots and up to 7km per hour at its core. The Sydney to Hobart Yacht Race takes place each year on Boxing Day, and the EAC can have a significant impact on the race. The current can vary between 15km and 100km wide, with eddies and twists that can either help or hinder competitors' progress.
Competitors in the Sydney to Hobart race need to carefully analyse the EAC and make strategic decisions to optimise their route. The location, speed, and direction of the EAC can vary, and those with the most accurate data can make the best decisions for the fastest route. The EAC can provide a boost to competitors if they can take advantage of its strong southerly currents. However, if they are on the wrong side of an eddy, the current can work against them, slowing their progress south.
The EAC also has ecological significance, transporting marine species southward and impacting the climate and ecosystems of Australia's east coast. Climate change is affecting the EAC, with the waters south of Sydney warming faster than most of the rest of the ocean, leading to expectations of a faster and stronger current in the future.
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EAC's influence on east-coast climate and ecosystems
The East Australian Current (EAC) is a boundary current that flows southward along the east coast of Australia, from the Great Barrier Reef to Sydney and as far south as Tasmania. It is a crucial component of the region's climate system and marine ecosystems.
The EAC is a powerful current, with speeds in its core reaching up to 7 km per hour, making it one of the strongest in the South Pacific. It moves an impressive 40 million cubic meters of water southward each second, spanning almost 100 km in width and over 1.5 km in depth. This massive flow of water influences the climate and ecosystems along the east coast of Australia.
One of the most significant impacts of the EAC is on the temperature of the waters off the east coast of Tasmania. The EAC has been responsible for warming these waters dramatically over the last several decades. This warming has led to the loss of giant kelp and an increase in warm-water intruders like the spiny sea urchin, disrupting the region's cool-water ecosystems. The EAC's influence on water temperature is expected to continue, with projections suggesting that the warming trend will persist into the 21st century.
In addition to its ecological impact, the EAC also affects the Sydney to Hobart yacht race, which takes place annually on Boxing Day. The eddies and strength of the current play a crucial role in the race, as choosing the right path around the eddies can significantly impact a yacht's performance.
Furthermore, the EAC influences the transport of marine species. It carries tropical fish and other marine organisms southward, allowing them to reach subtropical latitudes. This mixing of warm and cool-water species can have further ecological implications, potentially impacting the balance of marine ecosystems along the east coast.
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EAC's contribution to the Great Barrier Reef
The East Australian Current (EAC) plays a crucial role in the east-coast climate and ecosystems of Australia. It is a boundary current that originates from the South Equatorial Current, crossing the Coral Sea and reaching the eastern coast of Australia. The EAC flows along the east coast of Australia, spanning a length of around 4,000 kilometres. It is an impressive 100 kilometres wide and extends over 500 metres deep into the ocean.
The EAC is an essential contributor to the health and biodiversity of the Great Barrier Reef (GBR). It carries a large amount of warm tropical water from the equator southward, distributing nutrients and smaller organisms throughout the reef and surrounding areas. This process is vital for the thriving ecosystem of the GBR, which is one of the most complex natural ecosystems globally. The reef is home to an incredible diversity of marine life, including over 1,500 species of fish, 134 species of sharks and rays, and threatened species such as sea turtles and marine mammals.
The EAC acts as an underwater superhighway, attracting a wide range of marine species. Humpback whales, for example, use the EAC to migrate from their breeding grounds on the Great Barrier Reef to cooler feeding grounds in the Southern Ocean. The EAC also influences weather patterns by warming the air and adding moisture, impacting a significant portion of Australia's population and economy.
However, climate change is already affecting the EAC. The section south of Sydney has warmed up rapidly, and this trend is expected to continue, with the current likely to get faster and stronger. The rising water temperatures caused by climate change threaten the survival of coral reefs, including the GBR. The warmer waters driven by the EAC will force mobile species to migrate further south, leaving the northern regions of the reef devoid of species to fill the void.
The popular animated film "Finding Nemo" has brought the EAC to the public eye, although it portrays the current as a narrow jet rather than the massive and powerful force it truly is. Despite some poetic license, the film has raised awareness of the EAC and its significance in marine ecosystems, such as the Great Barrier Reef.
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Frequently asked questions
The East Australian Current (EAC) is a warm, southward, western boundary current that is formed from the South Equatorial Current (SEC) crossing the Coral Sea and reaching the eastern coast of Australia. In the film, Marlin and Dory arrive at the EAC, where they meet Crush and Squirt, and other sea turtles on their way to find Nemo.
Marlin and Dory hitch a ride on the EAC to get to Sydney and find Nemo. The EAC is portrayed as a narrow jet that they can jump in and out of, but in reality, it is much bigger and wilder.
The EAC is the largest ocean current close to the shores of Australia. It plays a crucial role in the east-coast climate and ecosystems. It transports 40 million cubic meters of water southward each second, which is the equivalent of 16,000 Olympic swimming pools.
The EAC has an impact on the Sydney to Hobart yacht race, as the eddies and strength of the current can be worth millions of dollars. The EAC also transports marine species southward, and climate change is causing the water to warm up faster than the rest of the ocean, which is affecting marine life in Tasmania.
