Lena Torres
Long Island Sound is a semi-enclosed arm of the North Atlantic Ocean, situated between the New York–Connecticut shore to the north and Long Island to the south. Covering 1,180 square miles (3,056 square km), it is 90 miles (145 km) long and 3–20 miles (5–32 km) wide. The sound is a tidal estuary, an area where freshwater from rivers meets and mixes with ocean saltwater. This unique ecosystem is home to a diverse range of wildlife, including various bird species and marine creatures, and serves as a critical habitat for over 1500 species of marine and aquatic life.
| Characteristics | Values |
|---|---|
| Location | Between New York and Connecticut to the north and Long Island to the south |
| Type | Tidal estuary |
| Water Source | Atlantic Ocean, Thames, Housatonic, Mianus, Mill, Norwalk, Pequonnock, and Connecticut Rivers |
| Water Type | Mix of freshwater and saltwater |
| Length | 90 miles (145 km) or 110 miles (180 km) or 113 miles |
| Width | 3-20 miles (5-32 km) or 21 miles (34 km) at its widest point |
| Surface Area | 1,180 square miles (3,056 square km) or 1,401 square miles (3,629 square km) |
| Volume | 18 trillion gallons or 67 billion tons of water |
| Depth | 63-65 feet (20-23 m) or 330 feet (100 m) at its deepest point |
| Average Tidal Range | 3-6 feet (1-2 m) |
| Population | 8-8.93 million people live along the watershed area |
| Flora and Fauna | 1,200 invertebrate species, 170 fish species, 120 species of finfish, and hundreds of bird species |
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What You'll Learn
Long Island Sound's location
Long Island Sound is a semi-enclosed arm of the North Atlantic Ocean, stretching from New York City to southern Westchester County, Connecticut, and the northern shores of Long Island. It is an estuary, a body of water consisting of both fresh and saltwater. The sound covers 1,180 square miles (3,056 square km) and is 90 miles (145 km) long, with a width ranging from 3 to 20 miles (5 to 32 km). Its deepest point, in the east, reaches 330 feet (100 meters), while the average depth is 63 feet (19 meters).
The sound is bordered on the north by the Connecticut and New York shoreline and on the south by Long Island. Major Connecticut cities on the Sound include Stamford, Norwalk, Bridgeport, New Haven, and New London. On the New York side, cities include Rye, Glen Cove, New Rochelle, Oyster Bay, and Port Jefferson, among others.
Long Island Sound is influenced by the waters of the Atlantic Ocean and several rivers, including the Housatonic, Thames, and Connecticut Rivers. These rivers provide 90% of the freshwater to the sound. The sound's watershed population was estimated to be about 8.93 million in the 2010 census, and over 20 million people live within 50 miles of its shores.
The sound is a dynamic ecosystem, providing a habitat for a diverse range of wildlife, including various bird species and marine life. It is home to thousands of species, including invertebrates, fish, and birds. The area also offers recreational activities such as boating, fishing, and swimming, contributing significantly to the local economy.
Long Island Sound holds historical significance, having been influenced by Native American cultures and European settlements. Industries such as trade, fishing, and whaling have marked the region's past. However, environmental challenges, including pollution and climate change impacts, have also affected the sound. Initiatives like the Long Island Sound Study, launched in 1985, aim to address these issues and restore the area's natural beauty and ecological balance.
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Its size and shape
Long Island Sound is a semi-enclosed arm of the North Atlantic Ocean, stretching from New York City to southern Westchester County, Connecticut, and the northern shores of Long Island. It is an estuary, a body of water consisting of both fresh and saltwater.
The Sound covers 1,180 square miles (3,056 square km) and is 90 miles (145 km) long. It ranges from 3 to 20 miles (5 to 32 km) wide and is 21 miles (34 km) at its widest point. The deepest channel in Long Island Sound is known as "The Race," with a maximum depth of 330 feet (100 meters) near its eastern limits. The Sound has an average depth of 63 feet (19 meters), with depths varying from 65 to 230 feet (20 to 70 meters).
Long Island Sound is sheltered from high winds and experiences two high and two low tides each day, making it ideal for boating and other recreational activities. The Sound's drainage basin is nearly 13 times its area, and it receives approximately 35% of its water volume from freshwater sources annually. The Housatonic, Connecticut, and Thames Rivers are the primary contributors to its freshwater content, accounting for 90% of it.
The Sound is home to diverse flora and fauna, including approximately 1,200 invertebrate species, 170 fish species, and hundreds of bird species. It serves as a critical habitat for over 1,500 species of marine and aquatic life, providing feeding, breeding, and nesting areas. The area's mild summers and cool winters, with a mix of rain and occasional snow, contribute to a favourable environment for these species.
Long Island Sound is an essential natural resource for Connecticut, with a watershed population of about 8.93 million as of the 2010 census. It plays a vital role for approximately 23 million residents living within 50 miles of its shores.
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The water and wildlife
Long Island Sound is a tidal estuary, an area of water consisting of both fresh and saltwater. The sound is a semi-enclosed arm of the North Atlantic Ocean, stretching 110 miles (180 kilometres) from the East River and Throgs Neck Bridge in New York City, along the North Shore of Long Island, to Block Island Sound.
The water in Long Island Sound is murky, and its depth varies from 65 to 230 feet (20 to 70 metres). The sound is home to a diverse range of wildlife, including dolphins, harbor seals, gray seals, long-finned pilot whales, and harbor porpoises. The area also provides a habitat for birds like the American oystercatcher, a short-distance migrant that feeds on mollusks in shallow waters.
The sound's waters are rich in plankton and bottom-dwelling organisms, making it favourable for young fish. Lobsters, crabs, and clams are commonly found along the Connecticut shores, and oyster farms are prevalent from Bridgeport, Connecticut, eastward. The sound supports a variety of finfish species, with approximately 120 species living in the sound throughout the year.
Historically, Long Island Sound was impacted by an outbreak of ""eelgrass wasting disease" in the 1930s, which led to a decline in wildlife populations dependent on eelgrass. However, areas along the Connecticut coast have since witnessed a gradual recovery of eelgrass populations. The Long Island Sound Study (LISS), established in 1985, aims to improve the health of the sound through partnerships and conservation efforts.
Long Island Sound is a valuable ecosystem, providing recreational opportunities and supporting a diverse range of wildlife and aquatic life. The Long Island Sound Futures Fund, in collaboration with organisations like the National Fish and Wildlife Foundation and the EPA, works towards improving water quality, restoring habitats, and enhancing the overall health of this important body of water.
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The people and places nearby
Long Island Sound is a semi-enclosed arm of the North Atlantic Ocean, lying between the US states of Connecticut and New York. The body of water separates Coastal Connecticut from Long Island.
The sound is 90 miles (145 km) long and 3–20 miles (5–32 km) wide, covering 1,180 square miles (3,056 square km). It stretches from New York City to southern Westchester County, CT, and the northern shores of Long Island. The sound is limited on the east by Orient Point (Long Island) and Plum, Gull, and Fishers Islands, and on the west by the narrow Throgs Neck, which leads into Upper New York Bay via the East River.
Major Connecticut cities on the Sound include Stamford, Norwalk, Bridgeport, New Haven, and New London. Stamford, in particular, is known for its beaches, attracting countless visitors who enjoy swimming, boating, fishing, and other fun summer activities. The New London Ferry Terminal is also a popular attraction, offering beautiful views of large, old homes.
On the New York side of the Sound, cities include Rye, Glen Cove, New Rochelle, North Hempstead, Oyster Bay, Smithtown, Port Jefferson, Brookhaven, and Riverhead. The Sound extends to portions of Queens and the Bronx in New York City.
The Long Island Sound watershed has a population of about 8.93 million people, as of the 2010 census. The area has a warm temperate climate, with hot and humid summers and cooler months featuring rain and occasional snow.
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Its history
Long Island Sound is a tidal estuary, a mix of saltwater from the Atlantic Ocean and freshwater from tributaries. It is a semi-enclosed arm of the North Atlantic Ocean, stretching 110 miles (180 kilometres) from west to east, from the East River and Throgs Neck Bridge in New York City, along the North Shore of Long Island, to Block Island Sound. It is 21 miles (34 kilometres) at its widest point and varies in depth from 65 to 230 feet (20 to 70 metres).
The history of Long Island Sound is closely tied to the glaciers that covered the area during the past 10 million years. About 18,000 years ago, Connecticut, Long Island Sound, and much of Long Island were covered by a thick sheet of ice, part of the Late Wisconsin Glacier. This ice sheet scraped off surface material from the New England landscape, depositing it into the Sound and creating what is now Long Island. The Long Island Sound basin existed before the glaciers came and was probably formed by stream flows. Glacial meltwater formed "Lake Connecticut", a freshwater lake in the basin, until about 8,000 years ago when the sea level rose and seawater overflowed into the basin, transforming it into a tidal, saline arm of the sea.
The glacier also created sandy plains and beaches, exposed bedrock, and sandy outwash deltas off the Connecticut coast. The Captain Islands off Greenwich, Connecticut, along with the Norwalk Islands and Falkner Island off Guilford, Connecticut, are parts of a recessional moraine. Other islands, including the Thimble Islands, are mostly exposed bedrock with a thin amount of drift. Sandy beaches and soft sandy seabeds characterise the coastline today, attracting countless visitors who enjoy swimming, boating, fishing, and other recreational activities.
Long Island Sound has historically been polluted by industrial, agricultural, and community sources, including untreated sewage and urban runoff. Eutrophication, algal blooms, and hypoxia have resulted from high levels of nutrients like nitrogen and phosphorus from fertilizer runoff. Despite this, the Sound is an important ecosystem, home to more than 1,200 species of invertebrates, 170 species of fish, and dozens of species of migratory birds. It serves as a feeding, breeding, and nursery ground for many species, including commercially important ones like lobsters, crabs, clams, and oysters.
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Frequently asked questions
Long Island Sound is 90 miles (145 kilometres) long.
Long Island Sound ranges from 3 to 20 miles (5 to 32 kilometres) wide. At its widest point, it is 21 miles (34 kilometres) wide.
Long Island Sound averages 63 feet (19 metres) deep, but its maximum depth is 330 feet (100 metres).
Long Island Sound covers 1,180 square miles (3,056 square kilometres).
Long Island covers 1,401 square miles (3,629 square kilometres).
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