Marine Heatwaves : Climate change is causing heatwaves within the oceans
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- เผยแพร่เมื่อ 4 พ.ค. 2022
- 2014
Several species like thresher sharks and ocean sunfish that preferred warm tropical waters were spotted almost 200 miles away near Alaska because of ‘the blob’.
2020
Australia’s 3.5 lakh km long Great Barrier Reef suffered a bleaching event when the Australian Bureau of Meteorology recorded its highest ever sea temperature.
2022
Prices of fish tripled in Mumbai, India due to a drop in fish catch volumes threatening the livelihoods of the famous Koli community.
What do you think is common between these three seemingly unrelated events in different parts of the world? The answer is Marine Heatwaves, which are happening due to ocean warming and other factors like high pressure systems. Marine heatwaves should not be misunderstood as waves traveling over the ocean.
These are extremely hot patches of water over the surface and subsurface of the ocean majorly attributed to human-induced global warming.
The first major MHW was recorded off the coast of Australia in 2011 which caused mass bleaching of reefs and a southward distribution shift in fishing communities. They’re detrimental to the marine ecosystem and specifically corals which lose color(expel algae) due to warming ocean waters. Corals occupy less than 1% of the global oceans but over 25% of fish depend on them for survival…often called the ‘rainforests of the ocean’.
In the Indian subcontinent, there are two regions where MHW occur specifically - western Indian ocean and North Bay of Bengal. When the temperature rises on the ocean surface, it can increase anywhere upto 3-4 or even 7 degree celsius.Not only do these heat waves cover a large area of the ocean basin, they can last anywhere from a few days to weeks or even months!
MHW are impacting the subcontinent by affecting monsoons and cyclones. If we take into account cyclone data since the 1980s, it shows that the characteristics of cyclones are changing over time. This is majorly related to ocean warming because a requisite factor for tropical cyclones to form is warm oceanic waters where the temperature is above 28 degree C. This is reflected most in the Indian Ocean which is the fastest warming ocean basin in the world. These warm waters provide more moisture and heat for the cyclones.
As a result, cyclone numbers are going up, which is more evident over the Arabian Sea. Since the Bay of Bengal is naturally warmer, already there are 2-4 cyclones forming there every year. But the Arabian Sea is reaching a similar status right now which supports active cyclogenesis.
Cyclones have increased by over 50% while their duration has increased by 80% like Cyclone Tauktae which started from Lakshwadeep Islands and hurled past Kerala, Karnataka, Goa, Maharashtra and made landfall over Gujarat. Although it should have died there because of friction with land, its remnants even reached New Delhi and Nepal where it caused rains. This increase in duration of cyclones is posing tremendous risks over the west coast.
The Indian Ocean is now a dangerous combination of events that will make the subcontinent increasingly vulnerable to climate change. Sea levels are rising every decade because ocean waters expand as they get warmer, which is also increasing the frequency of MHWs and subsequently cyclones. Cyclones are bringing more rains than before, which increases the flooding along the coast. This can also be accompanied by a high tide which is a natural event and storm surge which is caused by cyclonic winds. These compounded events affect human lives, infrastructure and food security.
But what should be done to better monitor these marine heatwaves? We need more surface based monitoring systems that can accurately tell us the warmer than usual spots. In the case of cyclone Amphan satellite data only showed that the sea temperature was 32 degree celsius. This discrepancy could have been overcome with an ensemble of instruments to support IndOOS like floats, drifter buoys and moored buoys which help monitor temperature, salinity and ocean currents. It takes at least 3 satellites to observe the Indian Ocean at all points in time, especially during a cyclone.
The 7500 km long Indian coastline spread across nine states and bordering an area of 2.02 sq.km area of Exclusive Economic Zone in the sea have a population of 420 million. Out of these about 330 million live on or within 150 km of the coast while the coastal economy sustains over 4 million fisherfolk and coastal communities.
As India’s blue economic policy concentrates on areas like deep sea mining and increasing contribution to the GDP, if ocean observational arrays are not enhanced, the opposite might happen and damage to the Indian Coast might be irretrievable. It is imperative for nations to step up so as to adapt to challenges put forth by a warming world.
*at pre-industrial Co2 levels
**according to the IPCC - วิทยาศาสตร์และเทคโนโลยี
The current gen of babies are heading for an uncertain adulthood. The 90s and 00s gen is growing up each year with a new weather news, that was not heard before.
“1 in 4 days event”
I GOT GOOSEBUMPS
We did too!
i didnt get it actually
And peoples are still unaware....
I'm scared....
We are too!
Nothing to be scared mother earth is taking her planet back to how it was .
Such an informative video, DTE should make more such videos that have content rather than just a 2-3 min video telling the news superficially, which isn’t expected from DTE.
We'll try for sure.
@@D2E yes please
@@D2E your videos are very much informative and useful
Even it's in range of 2 to 3 minutes
Or longer like this one
Thank you, we appreciate your support.
Great informative video. The scariest part of climate change is already evident in some places, were rising sea level have contaminated fresh water systems near costline.
Well said!
Over extraction of fresh water lens by overdevelopment allowed salt water intrusion. NOAA-NASA has not found any sea level rise since 2017, and before that, SLR was a mere fingernail 2.5mm per year. _A decade to rise a single inch._ So you are perpetrating another Climate Big Lie. You should be ashamed.
Where?
@@Matty18795 salt water intrusion is killing agriculture near the inlets of many rivers that spill out into the pacific ocean.
Dear brothers and sisters
Read environmental related books Prakruthi shukthloo Nature Principles books and Dr Msr sir books please
Avoid plastic disposal things please
Save food save water save power save fuel save paper save trees save ozone save nature save life save Earth
I came across DTE 4-5 months ago and had suggested this to my friends who really loved it and subscribed it.
DTE do you have any young communities who contribute towards fight against climate change? I wanted to join such thing as I'm once a delegate at earth summit
Edit- I believe DTE is one stop full fledged channel about anything related to climate. You guys are literally DOWN TO EARTH❤️
Thanks Anonymous, what kind of age group are you looking at?
@@D2E It's so kind of you. I think age group between 16-28 would be best because 16-19 is the age of conscious learning and 20-28 is age of exploring, stability in life and more practical with past experiences.
My field of interest is sustainable energy and food security which is directly linked to climate change. Let's hope to find brighter minds.
Great 👍🎯
India is a great country... We are trying and will keep trying but in twitter and commenting but do nothing...
Happy with the content, crisp and clear. Thank you DTE.
Appreciated!
Thanks DTE for the on to the point video.That's alarming though ☹️ .Iam at a vicinity of 10km near arabian sea..Iam 30 and I could clearly see this climate change happening.Before I was 15 yrs old I think we had a lot of fishes ,when my teenage days were over, I remember a rapid decline in mussel,sardines,macquerel,native species etcwhich once were abundant near shores, of Malabar coast.Now the fish craving people of Kerala are depending on other States for fish, and neighbour countries too. It's humid here now and unbearable to cope up temperature.. I believe after 2019 there was shift in monsoon ,like SE monsoon arriving early and has record showers,( coupled with the shifting elnino ,la Nina phenomenon)also the thunder and lightning which once was common at the end of the year is now more common throughout the year ie, more cyclones & heat waves infact,.we are actually in a situation here,not all people are aware about this, and it's impractical to stop the fossil fuel usage all of a sudden..but I think govt should reconsider carbon neutrality agenda of 2070 ,and to push further to 2050 atleast...otherwise ,what we earn now couldn't compensate for what we are about to face in future..A lot of people need to be educated 😑. I will do my part and educate my family and friends.Go 💚 green
Thank you for your support!
Thanks a lot DTE..
Keep guiding...❤️
Also this voice is very soothing...even informative things feels like a story....
Thanks you!
Great information. Never thought of such major ongoing impact around India @ India Oceans. Time for immediate actions for government and people of India too.
Thank you for your support!
That's because this is just propaganda and doesn't exist in the real world. Tony heller yt channel is great or realclimatescience .com remove space yt doesn't like links.
What scientists?? Yall keep saying scientists?? 1991 was the last 100° temps, wasnt that long ago.. wtf is this.. more bill gates b.s.????
Gotta reduce a lot of carbon footprint and speed up Transition towards renewables coupled with blue carbon conservation, ecological restoration of desertification. Controlled mining is the most crucial and key to fullfill the purpose. We need green stewardship and not greenwashers.
Everything......
Presentation,Anime, pictorial forms,voice..... everything is perfect 👍🏽
Great information. Thnks for this!!!
Glad it was helpful!
Great informative video about marine heatwaves
Great work by this channel 👍
Thank you so much 👍
So awful.
There you are. 🌝
Great work dte!
Keep it up
Thank you 🙌
Amazing explaination 🌟
This channel enriched my knowledge so much about environment.. thankyou for all of this 😇
Glad to hear that
The circumference of erath is around 40000 km..and u r telling that Great barier reef length is 3.5 lakh km.. 😅
Thank you team downtoearth
You're welcome! Please share and subscribe!
superb explanation
Very helpful video 👍
Glad you think so!
people need to watch this video
Please share!
But here are 1.8k views and only 112 comments!😢 Are we people enough to work for our planet ! I am currently preparing for NEET but my heart and mind for the first time together say 'go for the environment ' ,...... Otherwise the world may end up being like this ! I have a deep and deep connection with nature but whenever I find people doing harm I just burn my heart and soul 💔! Unable to do anything at that time but can think of doing my best to spread that much awareness 🥺!
amazing info ❤
Glad it was helpful!
La Nina impact?
Awesome. Keep doing it.
We will!
crisp, on point 👌
🙌
It's really great video... Plastic is the major culprit let's avoid plastic
Thank you!
This is new data coming in and it supports the possibility of loss of coastal land in India due to cyclonic surges and sea level rise. Coastal populations will have to migrate to higher ground adding pressure to those areas in terms of food and job security. We know this clock cannot be turned back now so we need to strengthen the inland infrastructure to prepare for this. Question: Will the coastline erode gradually or rapidly?
Oh my..!!! wat have v done n wat r v doing
India is going to take climate action by 2070, our govt has asked 40 more years to pollute since we are developing countries.
So india be prepare for what is coming. This year is 2022 ,so by 2070 nothing will be left to be saved
😂 we’ll be saved in nature by then.
We are doomed
Tony heller yt channel is great or realclimatescience .com remove space yt doesn't like links
Brilliant 👏 👏
Thanks!
let us just say we as humans deserve all this
Jesus. Not a surprise, but dang, another thing to worry about. 😳🤦♀️🔥🤬💀. Ocean heatwaves. 😱🌀🌊
Pollution by chemical factorys?
We need more Action, advocacy and activism to be a climate champion.
Is that Myntra ad really necessary? Kills the mood to watch your contents.
Save Our Planet
देश संकट मै हैं
Poori duniya sankat mein hai.
Monsoon over Western part of India as low pressure created over ocean draws winds to itself than moving toward Indian mainland. It will affect the monsoon patterns.
Leads to urban flooding
Landslides
Loss and irreparable damage Infrastructure
Groundwater contamination near coast
More duration , strength and number of cyclone
Marine heatwave promotes cyclogenesis.
It leads to coral bleching and mass killing of marine animals.
During cyclone amphan, temperature over the ocean was 34°c which is unlikely to occurs.
India should invest in observatory system to predict the accurate position of heatwaves.
Fish can just evolved to tolerate higher temperature
They would rather chose to go colder areas
🙏🙏
Latest on the coming extinction.
I love you guys at DTE but PLEASE be more militant in your language. Identify and attack with clarity, the people/structures (i.e., global north, capitalism) who are responsible for the this mass extinction.
Your Internet use is burning the equivalent of sixty huge fossil fuel power plants worth of energy every second. You need to sign off social media and plant a garden. Otherwise you are responsible for 'mass extinction' of the Truth.
Wasf !
Read environmental related books Prakruthi shukthloo Nature Principles books
Avoid plastic disposal things please
Save food save water save power save fuel save paper save trees save ozone save nature save life save Earth Stop Global Warming stop cancer heartattack etc
Terrible sound mix.
Hello, could you please point out the specifics? We'll do better next time!
👍
Also, not to distract from CO2 unduly, but I wonder about the influence of the magnetic poles which are moving in directions which could ultimately meet in the Indian Ocean. 🧐
Hindi main start Karo...a sab
What a bogus video. Not one word of Earth's magnetic field or the increased Cosmic energy we are currently experiencing. It's all humans fault.
Right now in Chicago it's in the mid-30Fs overnight in MAY. Over the West Coast, snow is predicted this weekend all the way south to Northern California! Have a friend in Scandanavia who says Spring is still buried under permafrost. Every year since 2017 the PacNW is getting COLDer, longer, wetter winters. Lichen and moss growing on fence slats _and even on vehicles left out in the rain._ Not ONE WORD in the bought-and-sold Six Medias of New Carbon Catholic.
@@robertmarmaduke9721 that is the arctic jetstream dropping down. That is climate change. Actic is getting warmer creating a slower looser windspeed . You are being given miss used information. It is similar to what happened with texas getting the big freeze last year or the summer heat waves even in canada.
both global warming and higher levels of CO₂ would be beneficial for the biosphere
the Earth is too cold, and CO₂ is a nutrient
Global warming has nothing to do with auto exhaust or emissions. There has been a substantial rise in seismic and volcanic activity over the last hundred years especially in the oceans. This has increased the temperature of the land, the sea, and the air. The earth's climate is most likely changing back to what it was 2,000 years ago when it was much warmer. When the Romans were in Britain (40BC-380AD) they grew citrus fruit in the north. en.wikipedia.org/wiki/Roman_Warm_Period en.wikipedia.org/wiki/Medieval_Warm_Period
Nise predtion.thanks plej.show deep stady Emusat up grah prati dware Kitana.dam.to zalmatti dam flod explan.hotu fivght .Dizaiur.manegmet.by.maharastra Government also dilli gov per 6 morni 12 mid day 15 pm.18.pm .give t.v.batmya sakti.karnneas.gov.work.pattanmd50.age78.barshi.pincod414301.thanks.lot
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