How Does Climate Change Affect The Ocean Nasa

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How Does Climate Change Affect The Ocean Nasa – Oceans cover about 70% of the earth’s surface. Therefore, we are not surprised that it plays a big role in the earth’s environment. As the Earth warms, the water in the oceans gains energy (heat) and distributes it more evenly across the planet. The ocean also absorbs carbon dioxide from the Earth’s atmosphere. Additional heat and carbon dioxide in the oceans can change the environment for many of the plants and animals that live there.

The ocean is important because it is a big part of our world. In fact, it covers 70% of the Earth’s surface. The ocean is the home and food source for many fish, animals, plants, birds, etc.

How Does Climate Change Affect The Ocean Nasa

How Does Climate Change Affect The Ocean Nasa

The ocean plays an important role in everything that happens in our environment on Earth. Even if you live on land – like humans – you cannot survive without the sea!

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An example: without oceans, the earth’s temperature would be much warmer than it is today. This is because the oceans absorb the Sun’s heat and spread it more evenly across our planet.

Oceans help absorb extra heat from the air because water is a good heat store. How do you think a water balloon reacts differently to fire than an air balloon? Credit: NASA/JPL-Caltech

Water is very good at storing heat. Water has a high heat capacity: it needs a lot of heat before it starts to heat up. On the other hand, air is not very good at retaining heat.

Earth’s climate is warming due to human activity. When the Earth experiences global warming, we experience warmer air temperatures. The ocean does a very good job of absorbing the extra heat from the air, thus delaying the effects of global warming.

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The upper meters of the ocean store as much heat as the entire surface of the Earth. Therefore, as the earth warms, the ocean receives the most energy. More than 90% of global warming occurs in the ocean.

But if the ocean gets too warm, the plants and animals that live there can get sick or die.

Coral reefs are created by living organisms. Coral reefs are threatened by warmer oceans due to climate change. Coral reefs are formed from colonies of very fragile organisms that build a structure around each other.

How Does Climate Change Affect The Ocean Nasa

Corals live together with leaves of the same color. Plants make food using sunlight ¬ – a process called photosynthesis. Algae share food with the coral, while the coral provides a safe and comfortable place for the algae to live.

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Both are friends, they live in clear, shallow waters where the sun shines. Fish and other sea creatures also love coral because there are many nooks and crannies to hide.

However, algae cannot photosynthesize in water that is too warm. The leaves will die, or the coral will be exposed. This has a negative effect on algae, corals and fish, as the coral loses its food source and becomes weakened and may die. This phenomenon is called coral bleaching and is a very serious problem in many marine ecosystems around the world.

), like land animals. Aquatic plants absorb carbon dioxide and produce oxygen, just like land plants. The ocean is great at absorbing carbon dioxide

It also comes from human activities. For example, cars, airplanes and industrial exhaust add carbon dioxide to the atmosphere. Too much carbon dioxide in the air is a problem because the earth traps more heat. The ocean absorbs about a quarter of the CO2

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Too much carbon dioxide in the ocean causes a problem called ocean acidification. You can read this article to learn all about ocean acidification and its effects.

The ocean receives heat from the Sun and ocean currents move warm water around the Earth. Ocean currents are like highways that carry water around the world. Heat (including salt) is the main source of energy for ocean currents.

Cold water near the North and South poles sinks into the ocean. Water near the equator is heated by sunlight. The warm ocean water then moves closer to the poles, then cools and sinks.

How Does Climate Change Affect The Ocean Nasa

The “Great Ocean Conveyor Belt” refers to the large currents that transport warm water from the equator to the poles and cold water from the poles back to the equator. Credit: NASA/JPL-Caltech

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As the Earth’s climate warms, the water also warms the melting sea ice. This heating can make the water less cold and suffocating. Without submerged freshwater, ocean currents can slow or stop in some places. This can change in places like Europe that have a cold climate thanks to warm currents in the nearby oceans.

Fresh water has less salt than estuarine water, where sea water mixes with river water. The ocean itself has the most salt. Credit: NASA/JPL-Caltech

The amount of salt in the ocean also affects the tides. Salt water is heavier than salt water. When the salt water in the ocean freezes, the ice can no longer hold the salt. Instead, the salt mixes with the water below, making the salt heavier. Glaciers, ice fields and icebergs are made of fresh water, so what happens if the ice melts? Good question!

The water in the North Atlantic sinks because it is cold, but because it is salty. Its cold and salty nature makes it very dense and heavy, so it can be seen very far away. But if too much ice melts in the North Atlantic, the water will become less salty and affect ocean currents. NASA satellites continue to monitor sea ice, ocean currents, and marine life to better understand this complex system.

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As the Earth warms, NASA notes that sea levels are rising. Water expands when heated. Because of this, warmer water takes up more space in the ocean, which leads to higher water levels. Another cause of sea level rise is the melting of ice on land. Glaciers and ice sheets are large pieces of land ice. As our planet warms, this ice melts and flows into the ocean. The more water in the ocean the higher the sea level.

NASA satellites regularly measure sea levels around the world. Learn more about how we measure sea level with satellites. As climate change worsens, its effects will be felt worldwide. The world’s oceans play an important role and absorb most of the carbon dioxide and excess heat produced by human activities. But that is also harmful. Some big changes have already taken place, and climate change in our oceans seems to be getting worse.

About 90% of the excess heat produced by atmospheric greenhouse gases is ultimately absorbed by the world’s oceans. Because the ocean is so large, changes in sea temperature seem small; sea ​​level has warmed by more than 0.5 C in the last century. This amount is still enough to cause large disruptions, and the warming is increasing.

How Does Climate Change Affect The Ocean Nasa

As objects heat up, they expand, becoming less dense and taking up more space. The ocean is no different. In fact, it is estimated that between 1993-2010, the spread of temperature increased sea level by an average of 1.1 millimeters, which is the largest cause of total sea level rise.

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The average sea level rise observed over the period 1993-2010 averages 3.2 mm per year, caused by many other sources, including water stored on land in the form of ice. (Photo: Manuel Bortoletti / China Talk Network)

Warm water also affects the upper atmosphere. Rising sea temperatures are associated with increased strength of hurricanes and tropical cyclones, which could increase the number of Category 4 hurricanes or worse that hit islands and coastal areas. Warmer waters can emit less carbon dioxide, which means more carbon dioxide remains in the atmosphere, increasing global warming.

As on land, high ocean temperatures cause destructive heat waves. Occurs when unusual weather conditions or water flows cause water temperatures to be above average for at least five consecutive days. But it can last months or even years. A water heatwave called “The Blob” occurred in the North Pacific Ocean from 2013-2015 and killed 1 million seabirds along the west coast of the United States.

When carbon dioxide dissolves in seawater, it reacts to form carbonic acid: a weak acid, but enough to change the pH of seawater, which is inherently alkaline. Since the industrial revolution, dissolved carbon dioxide is estimated to have lowered the average pH of the upper ocean layers by 0.1 pH units, from about 8.2 to 8.1 (state 7).

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This change may not seem like much, but since pH is measured on a logarithmic scale, it represents an increase in acidity of almost 30%. This has a major impact on the chemistry of the ocean and the ecosystems that depend on it.

Increasing acidity is bad news for shellfish and other marine life

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