La Nina and its Significance in a Warming World
ฝัง
- เผยแพร่เมื่อ 15 มิ.ย. 2022
- CREDITS:
Script and Voiceover: Aishwarya Iyer
Graphics : Sunny Gautam
Video Edit : Aishwarya Iyer
Executive Producer: Arnab Dutta
Based on an article published in Down to Earth by Akshit Sangomla.
ENSO or the El-Nino Southern Oscillation Phenomenon is a periodic variation in winds and sea surface temperatures over the tropical eastern pacific ocean. The warming phase is called El Nino while the cooling phase is called the La Nina phenomenon.
In a La Nina event, cooler than average sea surface temperatures prevail over the east and central Pacific Ocean. During the event, ‘trade winds’ are stronger than usual, pushing warm water toward Asia. These cold waters in the Pacific push a jet stream northward. This can lead to drought-like conditions in the Southern part of the US and cold/dry conditions in parts of the Pacific Northwest. So, the weather consequences of these winds differ.
In general the La Nina has a cooling effect on global temperatures. But, these weather consequences are changing now, which is being seen as evidence of a warming world. If the La Nina phenomenon extends for a long period of time, it leads to adverse effects on the weather.
From 1973-1976, the event was *37 months long. Whereas from 1998-2000, it lasted for **24 months. The current La Nina will also complete 24 months in ***August 2022.
Although we’ve seen long La Ninas in the past, its changing characteristics are the real cause of concern. Large parts of India did not experience a spring season at all this time. This was because a La Nina influenced north-south pressure pattern that normally causes excess rainfall and cold winters interacted with warm waves coming in from the rapidly warming Arctic region to prolong the heat waves.
During March, April and May the temperature anomaly of the eastern and central Pacific Ocean was 1.1 degree Celsius below normal. This is the second time since the 1950’s that the La Nina became stronger (cooler) in March-April-May than February-April. In India, this could extend the monsoon season like the last two years which could be devastating for agriculture. The drought in 40% of the US, drought in the Horn of Africa and southern part of South America could intensify with the continuation of the La Nina.
The NOAA also predicts that there is a 65% probability of an above average hurricane season for the Atlantic Ocean. A low wind shear (difference in wind speed and direction from near surface to the higher parts of the atmosphere) is conducive for the formation and intensification of hurricanes. A strong wind shear would have torn apart a hurricane from the top.
“Human induced climate change amplifies the impacts of naturally occurring events like La Niña and is increasingly influencing our weather patterns, in particular through more intense heat and drought and the associated risk of wildfires - as well as record-breaking deluges of rainfall and flooding,”
Petteri Taalas,
Secretary general of WMO
(During a press release on La Nina on June 10)
The changing consequences of the La Nina implore a more careful examination of the event in an increasingly warming world. - วิทยาศาสตร์และเทคโนโลยี
![ये एल नीनो क्या बला है जिससे गर्मी इतनी बढ़ गई है [How do El Niño and La Niña come about?]](http://i.ytimg.com/vi/U_S3PoxPHuI/mqdefault.jpg)
3 hours Geography content cleared in just 3 mins 🙏👏👏👏Graphics
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Best video I’ve seen on this topic. Thank you so much!
La Niña is supposed to continue into through 2022-2023 through next winter now as La Niña is getting stronger at its current intensity is -1.1 currently.
That's not what I have been reading. Interesting.
@@garywilson1688 yes it is it's getting stronger don't make that up its a moderate strength right now after 2 years straight of La Niña it's goes to El Niño.
Now it is at it's end and will transition into neutral ENSO very soon.
Wow, so much crucial information given in one video. As I've already mentioned, this is my one of the favourite channel and I'm glad to be its subscriber.
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More needs to be done about climate change.
Been changing long before humans came here.
from 2014 winter we have heavy snow in bulgaria . but this 2 or 3 years we didnt have any snow only for 1 or 2 weeks max and the temp was like -5 to -10 c for 3 or 4 days max on old days we have -10 c normal ! to -18 to 25 c in january its crazy how world change
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Thank you for your information
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There is alot of knowledge and awareness about climate change and environment
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Really what a climate y 🙏🏻
Wow itkna knowledge 4 min ❤️❤️ amazing
Thank a lot ❤️❤️Down to Earth❤️❤️
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Why the cooling water in eastern Pacific cause the jet stream to move northward? Anyone please
Amazing efforts (Down To Earth)
U cleared our doubts in so lucid way...
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Are you from Kerala?
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Canada is experiencing a colder than normal summer due to La Nina. It would have been much colder without Climate Change.
When exactly was this made?. Most of american media was admitting the La Nina lasted 3 years...36 months. Weather network canada admitted it was cooler in 2023 than in 2022.
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Hii 👋 ma"am crushing I'm your voice 😊 tune♥️ ma" am AND Thank you so much for information ℹ️ all wold ma" am grateful job
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The cause of the climate crisis is capitalism. To put it bluntly, the main culprit of climate change is capitalism. Several reports from the IPCC consistently state that human activity since industrialization has dramatically increased greenhouse gases in the atmosphere. This is the result of scientific research by climate scientists, and this is the period when capitalism appeared in full-fledged history. It is not difficult to understand why capitalism caused climate change through the massive emission of greenhouse gases. Capitalism aims to produce for profit, and for this purpose, it has pursued production for production and accumulation for accumulation. In order to support this production system, an enormous energy supply structure was needed to sustain production. Fossil fuels were chosen for this. Socialism is the answer!
Somebody translate in Tamil and post.
That's the problem with Downtoearth... They speaks many things within a 4 min video. Horrible explanation.
Hello, thanks for your feedback. We would be happy to know what did not work for you. And what you'd like to be different.
@@D2E Well I think El Nino and La Nina needs a seperate explanation. Also, they impact differently in different parts of the world. It would be better if you explain them part by part first and then amalgamate them for the better understanding. It's absolutely fine if the video length ranges b/w 10-15 min.
Thank you for letting us know. We will try to create longer videos of different natural phenomena so that the explanation is more detailed.