Major ocean currents and how they affect global temperatures

Hi everyone,

This week we're talking about ocean currents. Ocean currents are part of the ocean's circulation system and influence local and global weather patterns. They are produced by gravity, differences in water density, winds on the ocean surface and Earth's rotation on its own axis. They cause the movements and exchanges of different ocean properties such as salinity, temperature and nutrients. Ocean currents can flow at speeds of up to 4m per second however most flow at speeds between 5cm and 50cm per second. Weather patterns and ocean currents constantly influence one another. Ocean currents follow similar paths as global wind do, transferring heat from the equator to polar regions. They create and influence ecosystems worldwide, especially marine ones. However they also spread plastics and microplastics around the world far from their original source. This system of ocean currents is often referred to as a global conveyor belt. Today we're going to look at six major ocean currents.

Gulf Stream

The Gulf Stream is caused by movement of water in the Gulf of Mexico. It flows from the Caribbean up the eastern coast of the USA, before crossing the Atlantic and flowing towards the western coast of Europe. It is a warm surface current, meaning that it transports warm water to northeastern USA and into the Atlantic. As it reaches higher latitudes, it cools and the water sinks before flowing back towards the tropics. This current regulates the temperature in the North Atlantic region and causes milder winters in Western Europe.

Gulf Stream

California Current

This current flows from the arctic, down the west coast of the USA and towards the equator. Arctic waters are known to be very rich in nutrients, so this cold, nutrient-rich current flows southwards and has a significant effect on local ecosystems. It is vital for many sea creatures especially marine mammals such as dolphins and whales.

California Current

Kuroshio Current

The Kuroshio Current is caused by movements in western Pacific waters as the sun heats the ocean. This warm water flows up the east coast of Japan. It regulates the temperature in the North Pacific region and leads to milder winters in Japan and some other East Asian countries. It also serves as a migration route for many species.

Kuroshio Current

Agulhas Current

This current flows southwards down the East coast of Africa. It impacts the temperatures across the Indian Ocean Region and transports warmer water towards South Africa. This leads to higher temperatures in southeastern Africa. This current is also an important migration route.

Antarctic Circumpolar Current

The Antarctic Circumpolar Current is a cold surface current around Antarctica. It also transports cold water to the tropics. This current regulates the temperature of the Southern Ocean region and the coastal areas of Antarctica.

Antarctic Circumpolar Current

Thermohaline Circulation

The Thermohaline Circulation is a global deep current. It's caused by differences in water density. Transporting warm water to the poles and cold water to the tropics, it affects surface temperatures worldwide and distributes heat and nutrients.

Thermohaline Circulation

We hope you enjoyed learning about different ocean currents and how they affect global temperatures. We'll be back next week!

Your Green World Blog Team💚

Sources:

https://www.sciencedaily.com/releases/2023/10/231017123428.htm

https://www.sciencedaily.com/releases/2023/10/231009191640.htm

https://www.sciencedaily.com/releases/2023/10/231013114900.htm

https://www.britannica.com/science/ocean-current

https://education.nationalgeographic.org/resource/ocean-currents/

https://www.noaa.gov/education/resource-collections/ocean-coasts/ocean-currents

https://oceaninfo.com/list/ocean-currents/

Images:

Gulf Stream: Georges Clerc-Rampal, Public domain, via Wikimedia Commons

California Current: Cormorant24, CC BY-SA 4.0, via Wikimedia Commons

Kuroshio Current: Frank Geerlings, CC0, via Wikimedia Commons

Antarctic Circumpolar Current: NASA, Public domain, via Wikimedia Commons

Thermohaline Circulation: Brisbane, CC BY-SA 3.0, via Wikimedia Commons

Comments

Overfishing- An Introduction

When writing the article on the Yangtze Finless Porpoise, I briefly touched on the topic of overfishing. Many of you have probably heard about it, and know it is a massive problem threatening our seas and their inhabitants. Overfishing is so destructive, it can kill all life in the ocean, and many of you might be part of it every day. So I read through many articles from international organisations, and they all say pretty much the same things. It's a highly complex topic, with so many things to say and do, so this is just an introduction to the broadest points. It's very interesting (and sad) but when you look into it further you realize there is actually a lot you can do! This is very important, especially for ocean lovers and seafood people. What is overfishing? By definition, overfishing is so intense fishing, people catch fish quicker than the stocks can reproduce. Leading to a massive decrease in stocks that can peak in the extinction of a s...

April Top Tips: ten tips for environmentally friendly travel

Hi Everyone! We haven't been very present on the blog again recently but we are back today with ten top tips for environmentally friendly travel. Most forms of travel over long distances (unless you are willing to put in a lot of physical effort) use fossil fuels and are generally not good for our planet. So today we will be giving you a few tips which although won't mean that your travel is 100% planet friendly, will be a good start to doing as much as you can. Your Green World Blog Team💚 1. Use trains and boats rather than planes where possible Planes are awful for the environment. They are, however, extremely practical and so easy to use, cheap...It's hard to avoid them! They are so quick too so you don't have to spend as much time travelling. However, they are really bad for the environment. For example, you could fly once to Edinburgh from Heathrow for the same carbon dioxide levels as driving to Edinburgh 336 times! 2. Fly...

Photo Essay | dolphin spotting boat ride

Hi Everyone! Quite a while ago now, me and my family went on a dolphin spotting boat ride, and I've been meaning to share some photos for ages now! We saw so many dolphins very close up and we managed to get some good shots, although it can never be as magical as in person! All photos in this post were taken by me or my family. They were so close to the boat! This photo is stunning! It's under the water! Again - under the water! It was so hard to capture them jumping! This was the boat.... ...

Animals 36-40 in our '50 incredible animals' series

Hi, As you probably noticed, we took a break from this series, mostly due to having just too much to do. But we're back now with the last three posts. 36. The Pinocchio frog The Pinocchio frog can be found in the Foja Mountains in Indonesia. They mainly eat insects, although little is known about them. They are named because the males have a spike on their noses. They were only discovered in 2008, and this was completely by accident! It remained unnamed scientifically until over ten years later when it was given the name " Litoria pinocchio " . There is very little information about them but Wikipedia states that "the male Pinocchio frog inflates its nose when calling, and the nose decreases in size when the frog is calm and quiet," which I think is hilarious and so interesting! 37. Snub-nosed monkey Especially noticeable due to their curious looks, the snub-nosed monkeys can be found in the forests of central China and northern...

10 animals on the edge of extinction you didn't know about no. 9 - South Island takahē

Hello Today we’re talking about the South Island takahē, porphyrio hochstetteri . They are flightless birds, endemic to New Zealand. Takahē are brightly coloured and weigh 2.3-3.8 kg. They have red legs and a large red beak. Their feathers are coloured blue and green. They have wings, but these are only used during courtship or rivalry displays. They are territorial, with one family’s territory reaching anywhere from 4 ha to 100 ha (0,04-1km^2). Pairs will live in the same territory each year. They breed once a year and will raise 1-3 chicks (normally 2) each year. Both parents raise the chicks together. In the wild, takahē live in native grasslands and have a lifespan of 16-18 years. If snow covers the ground then they will move into nearby forests. They eat tussock grasses, sedges and sometimes rushes. But they are opportunists, so they will occasionally go for insects or even ducklings and...

Energy comparison: Hydroelectricity

Hello everyone, Welcome back to another energy comparison post. Today we're talking about hydroelectricity. This is basically just using the power of moving water for our own uses. This idea has been around for thousands of years. The ancient Greeks and Romans used watermills to grind grains for making bread. Watermills were used up until the Industrial Revolution. What is hydroelectricity? There are three types of hydroelectric power plants. Impoundment facilities are the most common. The water is stored in a pool or reservoir normally located at a higher elevation. The dam uses gates or valves to control the water flow. When there is demand for electricity, the water is released. It falls downwards and turns turbines that turn the kinetic energy of the water (movement energy) into electric energy. Diversion facilities don't have a dam. They channel the water towards the turbines using a system of canals. Pumped-storage facilities are...

National parks - how do they help the environment?

Hello National parks are a place of immense beauty. They are know as tourist attractions and are best recognised by their incredible landscapes. Today we are talking about their effects on the natural world! Yosemite National Park, United States National parks are normally created and protected by governments. In most cases, they have public access, meaning that visitors can walk around in them and admire them. The IUCN defines what is a national park and what isn't. In 2006, over 6 500 areas met the criteria and are defined as a national park. However, there are many areas called National Park, that aren't a national park according to IUCN and there are places that the IUCN defines as a national park but the government doesn't. So some countries have their own definitions. In the UK and some other countries, a national park referes to an u...

Animals 11-15 in our '50 incredible animals' series

Hello, We have another five amazing animals for you today. Enjoy! 11. Dhole This is a dog species which looks rather like a red fox . They are difficult to put into any of the dog subfamilies. They aren't foxes, nor wolves, nor domestic dogs. Dholes are fast runners and live in packs of 5-12 individuals. Although sometimes, different packs will join forces to become a pack of 30 or more individuals! However, these super packs are broken up after a successful hunt. The different packs rarely attack each other as neighbouring packs are often closely related. Dhole packs live in burrows with multiple entrances. They can be found in eastern and southern Asia. They eat wild berries, insects and lizards and as a pack hunt deer, rodents and other wild mammals. Interestingly, unlike other dogs, they rarely kill by biting at the throat. They are also good swimmers! 12. Irrawaddy dolphin The Irrawaddy dolphin can be found in coastal areas of south a...

10 animals on the edge of extinction you didn't know about no.4 - Sumatran elephant

Hello everyone, This is the 4th post in our '10 animals on the edge of extinction you didn't know about'. Today we are going to be talking about Sumatran elephants. You've probably all heard about Sumatran tigers, which are also on the edge of extinction, but Sumatran elephants are much less well-known. Characteristics Sumatran elephants live for around 70 years and grow 2 - 3.2m tall. They weigh 2 000 to 4 000 kg and are the smallest subspecies of Asian Elephant. The males have tusks, however, these don't grow as long as their African counterparts. The females also have tusks but these are normally so small, that they are hidden under the upper lip. Sumatran elephants are herbivores, eating bark, bananas, young fresh leaves and occasionally various wild herbs. Social lives Elephants are very social and live in herds of 20 - 35 individuals. These herds are led by a dominant female. Males leave when reach adolescence, either willi...

Ozone layer

Hi everyone, What even is ozone? And the ozone layer? Where does the hole in the ozone layer come from and what does it mean? Is it dangerous? What can be done? Often the ozone-talk can be complicated and confusing, keeping an overview is hard and understanding all the problems always difficult. Let us break it down a bit for you: What is the ozone layer? We'll start with the basics: The ozone layer is part of the stratosphere, which is the second layer of the Earth's atmosphere, between 10 and 50 km above the Earth's surface and made up of protective gases. One of these protective gases is ozone. There is not much ozone in the atmosphere, only 0.3 molecule of ozone per 1 million molecules of air. This is because ozone is chemically unstable and only forms when ultra violet radiation (UV light) hits oxygen and breaks the bonds between the atoms. It fact it is so unstable that even when it has formed, it breaks down again relatively quickly. This leads to ozone turning back ...

Green World

Search This Blog