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OceanClimateAtUoL
Великобритания
Добавлен 8 июн 2014
This channel is populated with videos derived from the research work of scientists in the Earth, Oceans and Ecological Sciences Department of the University of Liverpool and their partners in other institutions including the National Oceanography Centre. The videos aim to provide background to some of the questions we are investigating.
Gulf Stream and the carbon cycle
We are all aware of how the Gulf Stream is important in the transfer of heat in the climate system. In this video, we explore our view that the Gulf Stream plays a similarly important role in the ocean carbon cycle. The Gulf Stream transports nutrients and waters that can uptake carbon at depth, when these waters reach the surface at high latitudes there is an uptake of carbon dioxide from the atmosphere. Thus, in our view, the Gulf Stream helps determine the downstream carbon sink for the North Atlantic.
We are conducting a research project called C-Streams to understand this process, supported by the UK Natural Environment Research Council and the US National Science Foundation.
Film by P...
We are conducting a research project called C-Streams to understand this process, supported by the UK Natural Environment Research Council and the US National Science Foundation.
Film by P...
Просмотров: 1 028
Видео
Density-driven circulation in an estuary
Просмотров 4,9 тыс.4 года назад
This is a simple laboratory demonstration to show what happens to low-salinity (low density) estuary water when it enters the high-salinity (higher density) ocean. The low density estuarine water will float above the higher density seawater. This generates an average flow out of the estuary at the surface and an inflow of salty water near the bed, called “estuarine” or “density-driven” circulat...
The Atlantic Meridional Overturning
Просмотров 21 тыс.4 года назад
This laboratory demonstration shows a key process that maintains a large-scale but slow circulation in the Atlantic Ocean that is an important part of how Earth’s climate works. Near the equator warming of the surface ocean by the strong sunlight produces a layer of warm, low-density surface water that starts to spread northwards (in the real ocean this northward movement is helped by the avera...
Density layering and stratification in the ocean
Просмотров 7 тыс.4 года назад
This is a simple laboratory demonstration showing what happens to the flow of water that has an intermediate density, between a lower density upper layer of water and a higher density deeper layer of water. The intermediate density water will flow at the depth where it is stable - it has a lower density that the water immediately below it but a higher density than the water above it. An example...
Carbon emissions and surface warming
Просмотров 6375 лет назад
This animation forms part of the series “Carbon and Climate”, which is an ideal introduction to how carbon dioxide and the climate interact, and is intended for school children, teachers and interested members of the general public. Scientists predict the rise in global temperatures from carbon dioxide emissions by using computer models. The video considers how different models give slightly di...
What happens to emitted carbon?
Просмотров 1 тыс.5 лет назад
This animation forms part of the series “Carbon and Climate”, which is an ideal introduction to how carbon dioxide and the climate interact, and is intended for school children, teachers and interested members of the general public. It considers how much carbon dioxide has been added to the atmosphere during your lifetime, how the land and ocean absorb CO2, and why a smaller and smaller fractio...
Paris or Bust
Просмотров 5015 лет назад
This animation forms part of the series “Carbon and Climate”, which is an ideal introduction to how carbon dioxide and the climate interact, and is intended for school children, teachers and interested members of the general public. The Paris Climate Change Agreement, signed in 2016 by 195 countries, seeks to limit the rise in global temperature to 2 degrees Celsius. This video considers when w...
The RidgeMix Cruise
Просмотров 1715 лет назад
This video shows life about the research ship "James Clarke Ross" during a 6 week scientific cruise across the Atlantic Ocean. The oceanographic work mainly focused on the how the ridges on the ocean floor effect life in the water.
From Microbes to the Global Climate
Просмотров 1,2 тыс.6 лет назад
This video looks at how the very small can have a huge impact on one of the most important things on Earth... the climate. Photosynthesis removes carbon dioxide, one of the gases responsible for warming of the atmosphere. But where does photosynthesis take place?
Static Variation of Sea Level
Просмотров 2958 лет назад
Every year enough water to fill nearly two and a half billion (2,500,000,000) swimming pools moves between the oceans and the continents.
Measuring Changes in Ocean Mass
Просмотров 2358 лет назад
The ocean is over 4 km deep in places, so how do we go about measuring changes in pressure on the ocean bottom?
Sea Level and Liverpool (Part 3): Future Perspective?
Просмотров 9609 лет назад
This video forms part of the series "Sea Level: A Liverpool View". This video uses footage taken in Hoylake and West Kirkby near Liverpool of the storm that battered the UK on the 5th December 2013 to demonstrate the impact and potential hazard of storm surges. The video illustrates why storm surges happen and how sea level change in the future from climate change might contribute to increasing...
Sea Level and Liverpool (Part 2): Historical Perspective
Просмотров 9399 лет назад
This video forms part of the series "Sea Level: A Liverpool View". Beginning with the work of William Hutchinson, who measured the time and height of every high tide at the Old Dock in 18th Century Liverpool, the video illustrates how sea level measurement has developed to use a worldwide network of tide gauges and satellites, and considers the possibilities of longer term sea level rise signal...
Sea Level and Liverpool (Part 1): A Personal Perspective
Просмотров 1,2 тыс.9 лет назад
This video forms part of the series "Sea Level: A Liverpool View". Using the art installation "Another Place" by Antony Gormley at Crosby Beach, this simple scientific explanation demonstrates how sea level change is seen from a human perspective. Parts 2 and 3 of the series investigate the historical perspective and a possible future view. This video was made by oceanographers and colleagues a...
North Atlantic Ocean Sea Surface Density Anomaly Maps
Просмотров 19310 лет назад
North Atlantic Ocean Sea Surface Density Anomaly Maps
North Atlantic Ocean Sea Surface Salinity Anomaly Maps
Просмотров 28710 лет назад
North Atlantic Ocean Sea Surface Salinity Anomaly Maps
North Atlantic Ocean Salinity Anomalies versus Depth and Latitude
Просмотров 34210 лет назад
North Atlantic Ocean Salinity Anomalies versus Depth and Latitude
North Atlantic Ocean Potential Temperature Anomalies versus Depth and Latitude
Просмотров 26610 лет назад
North Atlantic Ocean Potential Temperature Anomalies versus Depth and Latitude
North Atlantic Ocean Sea Surface Temperature Anomaly Maps
Просмотров 54910 лет назад
North Atlantic Ocean Sea Surface Temperature Anomaly Maps
North Atlantic Ocean Sea Surface Height Anomaly Maps
Просмотров 33110 лет назад
North Atlantic Ocean Sea Surface Height Anomaly Maps
North Atlantic Ocean Heat Content Anomaly Maps
Просмотров 55410 лет назад
North Atlantic Ocean Heat Content Anomaly Maps
Who cares!!! So England becomes a block of ice!! How can we make the current stop faster and turn England into a block of ice!!!
Thankyou so much sir
I thought all of that was the intro
Excelent.
Fantastic explanation ! Thank you 😊
Amazing Sir . Love you from India ❤
god, this is fantastic
Fantastic and clear !
Climate is always changing but global warming is real (because excessive Carbon Monoxide, Methane and Dioxide outputs does heat the Earth)
Thanks. Visual demonstrations are the best
What is stopping others from explaining this in such an interesting manner ... Thankyou professor u made my life easy ....
First three minutes were very interesting.
Keep doing this types of videos sir Nice and easily understandable
Thats amazing! I am Ayushi, from India. Thanku so much, understanding Amoc in theory was giving me a hard time. But this video of practical representation helped a loads. Thank you so much sir. Amazing work indeed.
Thanks a lot for your clear and plastic explanation, professor!!
The evidence is overwhelming, rising CO2 causes irrational climate hysteria.
thank you so much for this explanation, it took me forever looking through random sources on google to understand the gulf steam, none helped.
Great demonstration
Amazing demonstration
Thanks so much for clarification
Amazing video, thank you!
wow thank you so much
Great representation 😮
How much salt did you used for the bottom layer?
The initial stratification was set up using about 100 g of salt (volume of half the tank is 5 litres). It needs to be salty enough so that when you do the experiment with the intermediate layer, the food colour in the mixed end of the tank does not upset the density layering (the food colour does increase the density a little).
I have a question, how do we ensure that the salty water and the freshwater stay separated, like I did the experiment but the "intermediate" density water kept flowing to the very bottom (sorry I'm a beginner). Also, could you please tell where did you get those dividers/walls/separators from? (Asking for a project 😅) Thank you :)
Thank you for the very clear explanation.
Best way to learn 👍👍👍👍
thank you for the great experiment
Did you know the AMOC don't just slow down, it can reverse for a short period of time. That effects the weather and it's all natural climate system weather.
Thank you sir🙏🙏
wonderful and really helpful explanation that will last in our mind forever. its a request from a student to kindly make more such videos. thanks and regards sir
Brilliant video
great explanation, thanks
Thanks for the informative video and animation.
Amazing Explanation.. thank You Sir:)
Your demos are fantastic! Thank you. My grade 2 students have been asking me about where oceans mix (or don't mix- they seem to think there's a straight line going down from the surface to the ocean and the oceans never mix together) and we tried to do a quick search in the middle of class but couldn't find anything that looked credible in the moment. These demos will be excellent to share with them!
It sounds like you have a very smart grade 2 class! Really pleased to see the lab experiment is useful for them.
Concept got cleared
Prof, could you explain what is the effect toward living organism like fish? does it contain more nutrients and smh like that? thank you
The deep water does contain a lot of nutrients. In the Atlantic we usually find the greatest nutrient concentrations at a depth of about 1000 metres. Somehow the physics of the ocean has to bring those nutrients back to the sea surface so that the phytoplankton (the single-celled plants that form the basis of ocean food chains) can grow. So, the nutrients do not directly feed the fish, but they do support the plankton ecosystems at the base of the food chain. The overturning circulation (as in the video) does bring nutrients back to the surface - mainly in the Southern Ocean, from where they can then be circulated into the rest of the ocean. The nutrients can also be mixed upward from a few hundred metres directly to the surface by, for instance, strong winds at the sea surface or strong surface water mixing in winter. I hope that helps.
what a beautiful explanation!!
As the Oceans shutdown, vulnerability to carbon-forcing grows weaker, and if we halt carbon emissions now that the AMOC is shutting down, the cold will be over-compensating. We are already in the first stages of the cooling correction effects of the modern warming in the last century--a Dansgaard-Oeschger event. Every 4th "DO" cycle (every 6000 years) there is an amplified event much more extreme--the Heinrich event. That is happening NOW in a Micronova. Shutdown of the AMOC. We are already at the beginning of an Ice Age. More details in my 2nd book, "Surviving the Micronova."
Clear and simple explanation- genius
hello sir. you did a great work. can you demonstrate the concept of brine rejection
There's a nice explanation here: en.wikipedia.org/wiki/Brine_rejection. It is something that happens when salt water freezes. The salts can fir within the ice matrix, so they are ejected from the ice as very salty brines. These are very dense, so they sink quickly - an important process at high latitudes when sea ice forms.
Great lab demonstration, thank you!
Oh really? 20 years ago people warned of this. Loser Trump didn't care. The rich rarely do. But now their homes are being flooded, on fire, ice storms killing people and suddenly they care? The glaciers are melting faster than past forecast models. If the glacier fresh water is large in volume the Thermohaline circulation will be disrupted resulting in more severe storms in the South United State's and at the same time drought in the breadbasket of America and water shortage.....
BS
Indian students love the way you teach sir thanks for making video sir
Amazing Video Thank you
thank you for this experimental teaching😊
Superb demonstration. Never seen any video like this on Atlantic ocean meridional circulation
thank you soo important to understand for climate change and future proofing my country Ireland , well buying it some time. The AMOC is working today for us keeping Ireland at 16 C while France and Spain are breaking May records going into29- 34 C and possibly over
appreciated efforts
Why is there more life in the sea at higher latitudes and colder températures such as plankton for example while the opposite is true of life on land?
Nice question! Think of the plants in the ocean as the base of marine food chains. These marine plants are microscopic, single-celled photosynthesisers. Like all plants they need light and nutrients. So, the subtropics might seem like a good place for them because there is plenty of light. But these microscopic plants have a problem than land plants do not have. Nutrients in the ocean tend to be in higher concentrations at depth - 100s of metres below the sea surface. Light is absorbed in the ocean very quickly - so the zone where photosynthesis can happen is only the upper 10s - 100 or so metres. So the microscopic plants have the problem that the key resources that they need (light and nutrients) are separated by 100s of metres. At higher latitudes the strong seasonality in the weather is key to helping the microscopic plants. Each winter the surface water cools and sinks (because cooler water is denser - like in the video). The sinking water forces deeper water to move up to the surface - and that deeper water brings nutrients with it that the microscopic plants can use up at the sea surface where there is also plenty of light. There's a nice video here: svs.gsfc.nasa.gov/2076 which shows the seasonal pulsing of the microscopic plant growth. At temperate and high latitudes this pulsing is dependent on the winter re-supply of nutrients to the sea surface.
@@jonathansharples8130 Uh-oh. That implies that injecting iron sulfate into the ocean in order to stimulate plankton growth that will in turn sequester CO2 from the air and maybe the sea water isn't going to be able to turn those large stretches of blue water in the tropics into green water full of thriving plankton since the other nutrients beyond iron will still be out of reach. I thought it was an idea too good to be true.