Skip to main content

Major ocean currents and how they affect global temperatures

Image
By

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 TeamšŸ’š


Sources:

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

Post a Comment

Popular posts from this blog

Maldives - the direct impacts of climate change

By
Welcome back, Today we’re looking at the direct impacts of the climate crisis . The main reason why people don’t believe in climate change is that they can’t see it with their own eyes. So, we’re going to have a look at the Maldives where the effects of climate change become more obvious with every passing year. Maldives The full name of the Maldives is The Republic of the Maldives. It is an independent country made up of about 1 200 islands in the North Indian Ocean. The northernmost island is situated 370 miles away from the mainland (India). The islands are actually the tips of an ancient volcanic mountain range that is now almost completely submerged. In fact, the highest point is 1.8m-2.4m above sea level with the average elevation being 1m above sea level. The islands have a large tourism industry, due to the stunning nature found on and around the islands. 500 000 - 1 500 000 tourists visit the islands each year. This is mainly 'nature to...
Post a Comment
Read more

13.12.2020 Animal Of The Week: Lark

By
Hello, Today's post is all about a rather interesting bird I don't know much about and so I can't wait to discover more! Habitat There are many different species of Lark so they are quite widespread. Different websites say different figures but most agree that there are between 90 and 100 different species of Lark. They live in open countryside from deserts to mountains. Their colour is adapted to their environment and so they can vary in appearance. Diet Larks are omnivorous animals and eat many species of insects as well as seeds, leaves, grasses and fruits, especially in Winter as insects are scarce. Some species will also eat snails which they break open on rocks. Lark Song The lark is reputed for its song, especially when it is in flight. This is the reason that they are sometimes represented in poetry. I love poetry and I haven't read any Lark themed poetry yet but writing this has made me want to. However, the wi...
Post a Comment
Read more

Rachel Carson 1907-1964

By
Hi everybody, Today I am going to tell you about a really inspirational environmentalist. Her name is Rachel Carson. I hope her story inspires you to be more careful about pesticides. As a girl, Rachel adored writing stories about animals. She got a degree in zoology but had to go home to care for her ageing mother. She wrote a series of radio shows about fish for a living. Rachel's program, called 'Romance Under Waters', was a big hit. Her ways of writing were different to anyone else and no one had made that sound so interesting before. It proved that she was talented in not only science but also writing. She wrote two books called 'The Sea Around Us' and 'The Edge Of The Sea'. When Rachel moved to the countryside, she realized the impact of pesticides. At that time farmers sprayed chemicals on their fields a lot to protect them from animals that may want to eat them. Rachel worked out that they were killing pla...
Post a Comment
Read more

Communication - how important is it in the natural world?

By
Hi everyone, So today we're talking about communication in the natural world. As humans, we tend to think that we are superior to the rest of the organisms on this planet. We also think that we are the only ones who can communicate. While it's true that we probably have the most complexe form of communication, not one but thousands of languages, we are by far not the only ones that communicate on a daily basis. First of all, we need to define communication. Most people only think of speaking and writing (emails, texts, letters, and so on). But communication is much more than that. The word 'communication' describes the transfer of information from one organism (sender) to another organism (receiver) or multiple organisms (receivers). Different species go about doing this in many different ways. Animals communicate through sounds, visuals, chemicals, movements, touch, scents, electrical signals or a combination of the above. Sound...
Post a Comment
Read more

Mental Health: The benefits of being in nature

By
Hello everyone, and welcome to this week's post! Today we thought we would talk to you on the benefits of being in nature for your mental health. This has been a much talked about subject recently, so it felt fitting that we would do a post about it. Fresh air and exercise have long been used as ways to make you feel better, whether you are suffering from a physical ailment or issues with your mental health. Just spending time outside is known to generate many positive emotions, including happiness and feeling calmer just to name a few. Over longer periods of time, it is shown to help with anxiety and depression. Although it obviously can't solve the underlying problems, it can definitely help us. However, it is less known how vital it is that the nature is 'high quality' in order to gain these effects to their full extent. This 'high quality' nature is often litter-free and clean, both of which are important if y...
Post a Comment
Read more

10 Animals on the Edge of Extinction No. 10- The Javan Rhino

By
The Javan rhino is listed as the 1st animal on WWF’s list of the 10 world’s most endangered animals, and I for my part, had never heard of it! If you hadn’t either, we’re changing that now.  A bit about the rhino’s lifestyle The Javan rhinos are now exclusively found on the island of Java in Indonesia, but were once found in vast regions of northeast india and Southeast Asia. They have a dark grey colour which looks almost black when wet, and their (often pink) skin folds look a bit like plated armor. Both males and females have lower incisors which resemble tusks that they use to fight. Males have one relatively short horn of about 25 cm (10 inches).  Javan Rhinos live in tropical forests, marshy areas and in the thick bush. They are mainly browsers and eat over 100 plants species they find in the forest, weigh between 900 and 2300 kg (1984-5071 pounds) and are between 3 and 3.2 meters (10- 10.5 feet) long.  How endangered are we talking?  Javan rhinos are the most ...
Post a Comment
Read more

July Top Tips | 3 up-cycling ideas

By
Hi Everyone! For July, we will be sharing 3 up-cycling ideas that you can easily try at home to save money, and the planet at the same time! Thank you so much for joining us today and let's get into it! 1. Fabric off cuts to gift wrap! So you've just finished making a new cushion for your lounge or sewing a bag, and you have fabric left over. These small pieces of fabric still may have a purpose one day, so you fold them up neatly and place them in a drawer, just in case. But the time never comes and the same offcuts have been in the drawer for years. Why don't you use it as gift wrap? Wrapping paper is a problem environmentally so using fabric is a win-win! And it can look fantastic! If your offcuts are too small, why don't you sew them together and make a patchwork-style version? And the best thing is that it can be reused again and again! 2. Jars There are so many things that you can do with jars. Probably one of the ...
Post a Comment
Read more

Amazon Rainforest series - part 3: human involvement

By
Hi everyone, This is the last post in the amazon rainforest mini series. It's all about how humans have affected the amazon rainforest. Unfortunately, most human impact on the amazon is negative. The Amazon rainforest faces many threats, but the main one is fire. You may think that the fires in the amazon are wildfires or created by accident, but that is not true. All over the amazon, farmers are setting fire to the trees and foliage. For only one reason, to clear land for farming. But this is a disaster. Last month, the amazon rainforest reached its tipping point . Due to the fires, it is now releasing more CO2 than it is absorbing. To feed our growing population, we are killing countless species. Species, that in some cases, we haven't even discovered yet. If the amazon rainforest goes, climate change will become pretty much unstoppable. But it isn't only animals and plants that are suffering. Do you remember all those tribe...
Post a Comment
Read more

August 2021 Factfile - some news, animals and a plant

By
Welcome to our August factfile, News Bad news :( Fires in and around Athens Athens has been under siege this month, but not by any army. The forests all around the capital and in other parts of Greece and Turkey have gone up in flames. Houses have been destroyed and thousands have been evacuated. The reason is, of course, climate change . “It’s been crazy over here. Between the extreme heat and the wildfires, it feels apocalyptic,” Eleni Myrivili wrote in an email on Thursday as the army was deployed to assist firefighters. “Ash is raining down on us here in Athens.” England's lake district in peril Lake District, a popular holiday resort in the north of England, is now eroding faster as a result of climate change and an increased amount of walkers due to the pandemic. Paths that were once two meters wide are now at least 12 meters wide on some walks. Also visitors tend to walk off the path, endangering local wildlife. With...
Post a Comment
Read more

10 Animals on the edge of extinction, You did not know about no.1 - Yangtze Finless Porpoise

By Anonymous
The first animal of this series is the Yangtze finless porpoise, a dolphin living in fresh water in southern China in the Yangtze river. It is one of the very few dolphins living in fresh water and the only species left in the Yangtze river. Unfortunately, the porpoise is facing extinction. What is it? The Yangtze finless porpoise is a dolphin species living in the Yangtze River in southern China. It is one of the very few dolphin species that live in freshwater, and the only one that survived in the Yangtze river after the Baiji Dolphin was declared functionally extinct in 2006. It characteristically is about 2 meters long, has no fins -as the name suggests- and no beak. Its mouth however is curved upwards like a smile, giving the Porpoise and cute and friendly face. It feeds on small fish, crustaceans and molluscs. Sadly, the Yangtze finless Porpoise is considered "critically endangered" as there are only about 1000 of them left.  Why i...
Post a Comment
Read more