Luyện nói tiếng Anh bằng Shadowing qua video: What Is El Niño? And why it could cause chaos this year - What in the World, BBC World Service
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People are really worried about this year's one.
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People are really worried about this year's one.
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I mean, I've heard it being called, 'Godzilla' El Niño.
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They're quite strong words for scientists to use who are normally quite neutral.
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they're saying it could be one of the strongest on records.
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That's really concerning because the strongest ones in the past 50 years have caused global temperatures to rise.
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You're probably no stranger to stories of extreme weather events, floods, wildfires, destruction, and I don't want to alarm you, but this year we are going to have a massive weather event called El Niño, which is when parts of the Pacific Ocean warm up and that has knock-on effects for the rest of the planet.
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And this year is going to be one of the biggest ones on record.
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So today we're going to break down exactly what El Niño is, as well as its sister weather phenomenon, La Niña, and you're going to hear how countries around the world are trying to prepare for it.
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I'm Hannah, and this is What in the World from the BBC World Service.
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First of all, we're going to hear from some of you about how El Niño is affecting your country.
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Temperatures over here are already crossing forty-six to forty-seven degrees Celsius.
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Now what's worrying over here is that earlier people at least got some kind of relief during the nights, but now even the nights remain extremely hot.
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The temperatures are still touching fourty-five degrees during the nighttime.
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When we talk about El Niño, it can intensify heatwaves, delay rainfall, and make dry heat conditions even worse.
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This is no longer feeling like extreme weather.
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It's actually becoming the new normal for us.
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Across India, hundreds of heatstroke cases have already been reported this summer and several deaths are being linked to extreme heat.
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Hospitals have been put on alert and have been told to be prepared for heatstroke cases and people are now being advised to avoid stepping out during peak afternoon hours.
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Many people in India still feel we need a much more stronger long-term planning, better urban cooling, more trees, shaded areas, stronger water management and reliable electricity supply.
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Hello, my name is Santiago Stebelski, and El Niño and extreme weather can have very big impact where I'm from because I'm surrounded by the ocean.
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If extreme weather becomes stronger, it can affect the daily lives of the people in my region with stronger hurricanes, flooding, and destroyed beaches like the one behind me.
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Beaches are changing, storms feel more intense, and environmental problems are becoming more noticeable each year.
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I think it's important for everybody, especially young people, to speak about these issues to help raise awareness about climate change because it affects everybody.
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Now we're going to break this down with our go-to climate and science correspondent, Georgina Rannard.
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Hi, Georgina.
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Hey, Hannah.
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So we've talked about this before, haven't we?
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I think it was a couple of years ago.
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Can you explain again, what is El Niño?
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What causes it?
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It's really complex, so you've got to bear with me, but the key thing to remember as we go through it is water temperature at the top of the ocean, so sea surface temperatures, they're the way that we understand this pattern and we actually see it emerging around the world, every few years.
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So El Niño is one part of a natural phenomena called El Niño-Southern Oscillation, one of those very scientific, technical sounding terms.
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But normally, in the Pacific Ocean, trade winds blow west along the equator.
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So if you picture a globe or a map, sometimes we see those little arrows indicating wind.
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So normally, they're all pointing west, and that brings warm water from South America towards Asia.
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But during El Niño, those winds, those little arrows weaken, and all of that warm water is then pushed back eastwards towards the west coast of America, so there's much more, basically a lot more water in that region, and all of that affects global weather patterns.
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What kind of effects are we talking?
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What actually happens?
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I remember reporting on it in 2024 and there was a few weeks when I was working when just a series of different records were broken.
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We sort of smashed through those records.
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So that included the hottest day in terms of global average temperatures, the highest temperature the ocean's ever reached, and I also reported on a coral mass bleaching event, and all of those things were linked to this El Niño event.
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Not every one is the same.
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Not every El Niño is the same and the patterns can vary, but on the whole, it can affect temperatures.
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So global temperatures increase during El Niño.
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Niño. I talked about sea surface temperatures and warm water.
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El Niño means all this warmer water spreads further through the oceans and stays closer to the surface.
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So if you think about if you have a bowl of boiling water, sort of imagine that, and then think about the air just above that boiling water, that's going to get hotter.
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Mm-hmm. That's what happens with the ocean.
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So it releases this warm water upwards, creating warmer and wetter air.
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So they don't, they don't make the all areas of the world hotter.
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But in South America, the southern part of the African continent, most of Europe, India, Japan, parts of Australia, they all get a bit hotter.
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But some parts of the US and Scandinavia and even parts of Australia, they actually get a bit cooler.
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So that's one of the effects.
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Rainfall is another major area affected by El Niño.
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So the warmer water pushes the Pacific jet stream.
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It goes further south than east, and that brings, wetter weather to the south of the US and the Gulf of Mexico.
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Um, We get some very powerful rainstorms, a lot more flooding.
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But Conversely, the disruption also means you get places with drier conditions.
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So Southeast Asia, Australia, Central Africa get much less rainfall, and they actually can fall into drought.
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And we can also get more tropical storms.
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But they move around, so we get-- we don't get as many hurricanes in the Atlantic but there are more storms in the tropical Pacific.
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There's also… So that's our weather, but it can also affect ocean life and marine life and and our food systems.
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Obviously, we all, or many of us, eat fish.
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So everything living in the ocean, fish, whales, phytoplankton, octopus, they all rely on this really complex movement of nutrients through the ocean.
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Lots of those are in the deeper water.
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But when the um, upwelling, which is what this movement of nutrients is, when that doesn't happen because of El Niño, there's basically less food, less nutrients around, in parts of the ocean, which means a lot of those animals can't eat as much.
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So we get- there's less fishing of things like salmon or tuna.
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And I'm interested in the name.
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So El Niño means 'the boy' in Spanish.
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It's got its sister, La Niña, where do these names come from?
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El Niño, La Niña are, were first identified actually in the 1600s, so more than 400 years ago.
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And it was a group of fishermen in Peru who worked, you know, in the Pacific waters off Peru, who noticed that around Christmas, which is often when the warmer temperatures were peaking, there was less fish for them to, to fish.
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And so they realised, you know, their livelihoods were affected.
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And so they identified this changing ocean temperature and called it La Niña or El Niño and La Niña.
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El Niño means, people who speak Spanish who are listening or watching will understand, El Niño is the boy or the child, La Niña, the girl or the child.
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But it was because it was at Christmas they linked it to Jesus.
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So this really powerful, really significant and complex weather event is actually effectively called the Christ child.
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And tell me a bit more about La Niña.
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Is that essentially the opposite of El Niño?
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Yeah, more or less.
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So La Niña is when you get colder water upwelling, and to some extent, in simple terms, it has the opposite effects um, of El Niño.
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So at the moment we're sort of- we've just come out of La Niña, which has been happening over the past couple of years, and we're sort of swinging from that into El Niño.
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I think at the moment we're probably in a sort of neutral phase, but already at the moment if we think again about sea surface temperatures, if you look at maps of temperatures in the Pacific Ocean, you can see these sort of moving blobs of red and there the higher temperatures developing and, and, and coming up to the, the top layer of the ocean.
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So is that really how it works?
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We kind of go between El Niño and La Niña.
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Is it every couple of years?
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I mean, we last spoke about this, you said it was in 2024, right?
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Yeah. So it is a pattern.
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So we sort of move in between the two.
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The episodes usually occur sort of two to seven years.
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Normally they last around a year but they can go for longer.
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You know, we've, we've had around two years of La Niña and now we'll move into El Niño.
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That could last a year, 18 months, and then we may have a neutral time and then we would probably go back into La Niña, although not always.
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You can just have another El Niño off the back of the previous one.
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People are really worried about this year's one.
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I mean, I've heard it being called, Godzilla El Niño.
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What is unusual, I think, is about how scientists are talking about it.
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So as you said, they're calling it a Godzilla El Niño, super El Niño.
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They're quite strong words for scientists to use who are normally quite neutral.
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they're saying it could be one of the strongest on records.
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That's really concerning because the strongest ones in the past 50 years have caused global temperatures to rise by about two degrees Celsius.
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What they're saying for this one is it could actually increase global temperatures by about three degrees Celsius, and that's all off the back of the global warming we know is happening because of climate change.
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And there's one perspective that I found quite interesting I was reading earlier where it was this, a scientist who was saying, "Look, you know, we can call it super El Niño, Godzilla El Niño, but what really matters is the background picture of climate change." So human induced climate change has already driven up temperatures by probably 1.5 degrees Celsius, and that will increase.
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And it's that which is happening on top of El Niño, which is what really matters at the moment.
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And arguably is also the area that we can do something about, whereas the El Niño, La Niña, is a natural pattern.
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We can't do anything about that.
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Are we better prepared than some of these historical massive Godzilla super El Niños for the one that's coming our way in 2026?
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It's difficult to prepare for.
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You know, these are, they're quite big changes that you need.
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You can't suddenly just adapt a whole city to flooding.
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But I guess because we're already, to some extent, preparing for global warming, for climate change, a lot of those preparations will also help us for the extreme weather that would come with El Niño.
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Yeah, that, that's really, really useful.
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Thanks so much, Georgina.
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Thank you, Hannah.
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If you've got any thoughts or questions about this episode, please do get in touch with us.
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You can leave us a comment below.
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You can let us know if, if you're in a country that is feeling the effects of El Niño and what your country is doing to try to prepare for it, or is it something that you're preparing for at all?
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As I said, we have comments right here on YouTube.
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You can also get in touch with us on Instagram, @bbcwhatintheworld, or on WhatsApp.
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All of our details are in the show notes.
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And I want read out a comment that we got on another episode that we did with Georgina.
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It was about how species of wild bees are at risk of extinction in Europe and why they're so important for humans.
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Now, I didn't actually know, but bees, wild bees, pollinate 75% of all of the crops that we eat.
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And Jim left us a comment, and he said that in Peru, bees are legally protected.
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It's an offense to kill bees.
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And I had a look at that, and it's a particular species of bee from the Amazon that has no sting.
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So thank you, Jim, for that comment, and keep those comments coming.
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That's it from me today.
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I'm Hannah.
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This is What in the World from the BBC World Service, and we'll see you next time.
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