a portion of this video was sponsored by
google oceans produce more than
half of our oxygen shout out
phytoplankton absorb
most of the heat from global warming and
cover 70
of our planet but they're also changing
faster than ever
so what will the ocean look like in 1000
or even 10 000 years from now let's
start with 30 years from now the number
of fish in the sea has dropped by
50 since 1970 so maybe you should
consider settling down with that dud
boyfriend or girlfriend because honey
there is not plenty of fish in the sea
anymore in 30 years there'll be more
plastic in the ocean than fish by
biomass and species like sea bass
usually common along north carolina
shores
will be up near new jersey as marine
life migrates to cooler waters
sea levels have actually risen five to
eight inches in the last 100 years and
continue to rise
by 2050 190 million people will be
facing a sinking city
ho chi minh city will be below sea level
alexandria and egypt
underwater and mumbai one of the largest
and most densely populated cities in the
world
submerged in just 30 years like i assume
i'll still be alive to see this happen
sea walls could help but as one
scientist benjamin strauss climate
central's chief executive said
how deep a bowl do we want to live in
100 years from now is where our most
accurate scientific models predict until
but before we get to those predictions i
want to take a quick moment to thank
today's sponsor
google they've made so many cool new
things that have helped us learn
progress and get all that extra
information into our tiny little brains
so i'm happy to have them sponsoring
this portion of the video let's talk
about three new features that have me
really excited the first i'm probably
the most excited about because not only
does google allow us to keep educating
ourselves
but now you can use google lens to
visually input your homework
from word problems to your toughest math
questions not only will google help you
find the answer
but they'll give you a step-by-step
guide on how to get there now the
science nerd in me is also super pumped
about the more than 2
000 stem concepts that google has made
available at the touch
of a finger you can now search for
things like the pythagorean theorem the
quadratic formula
even ohm's law this would have saved me
so much time in school and 15 year old
me is
literally crying inside but so happy for
you the second thing i want to tell you
about is google hum
to search you know when you have a tune
stuck in your head and you just
can't figure out what it is well now you
can hum whistle or sing it and google
will find it for you right away
there's hydrogen and helium then lithium
irelia but none of you would have ever
forgot that song right okay last feature
i'm going to share is that google has
ar animals you can use the google app to
see life-sized animals anywhere around
you with augmented reality
don't even have to go to the beach
anymore to see a dolphin i mean imagine
being able to see them
up this close and move around them in
augmented reality so cool of course
who knows what's going on in the ocean
anymore so thanks to google for
sponsoring this portion of the video
and now back to oceans 100 years from
now if carbon emissions keep going up
there'll be a two to three foot
sea level rise a major reason for this
rising is thermal expansion so
warmer water actually takes up more
space physically because of increased
vibration
and yes glaciers melting adds to this as
well and as the oceans heat up the great
conveyor belt is slowing down this
current carries warm water from the
tropics to the poles and vice versa
insulating europe and north america from
wilder weather if trends continue by
2100 the gulf stream will weaken by
34 to 45 percent a weaker conveyor belt
means hotter summers in europe
and fiercer storms in the u.s it means
profound
large-scale impacts on the planet in
terms of weather patterns
upending agricultural practices
biodiversity and economic stability
across the vast areas of the world
not only does the ocean provide food
medicine mineral
and energy resources it also supports
jobs and national economies
serves as a highway to transport goods
and people and plays a role in national
security a slower conveyor belt also
means that silt
and debris get carried and deposited
differently and over centuries of this
the landscape of the ocean floor will
change to a muddy mess
ever heard of a seashell say bye-bye as
we release
more carbon dioxide and the ocean's ph
continues to decrease
animals that make shells like clams and
oysters will struggle
predictions for c-carbonate and ph
conditions in 2100
showed that animals like the sea
butterfly or pteropod
would lose their shell within 45 days
and the loss of these shells and
skeletons would decrease the chalky
layer of mineral that's there now
meaning more muddy mess vibes and if we
stay on the same emissions path by 2300
there will be a 26 foot rise in sea
level
in 500 years from now the sea could be
suffocating
literally in the 1950s there were around
50 dead zones in the ocean where oxygen
was so low that nothing can survive
today there's around 500 dead zones in
the ocean
and they're growing covering millions of
square miles
warmer oceans hold less available oxygen
but as body temperature increases in
animals their metabolism increases and
they actually require
more oxygen fishing and fish farming
support the livelihoods and families of
some
660 to 880 million people
that's 12 of the world's population any
change to the ocean ecosystem has a
direct
impact on so many people large areas of
the ocean could also be stuck in layers
like a cake in a process called
stratification the ocean does this
naturally but with currents there's
usually mixing of the surface and deep
water
which circulates heat and nutrients in
fact the ocean absorbs over 90 percent
of the heat
and approximately 30 of carbon dioxide
emissions produced by human activities
as the surface temperature continues to
increase rapidly
it becomes less dense and less able to
absorb carbon dioxide
and the greater the density difference
between the surface and deep ocean
the slower and more difficult the mixing
becomes this creates a negative feedback
loop
with less mixing more carbon stays in
the atmosphere which warms the earth's
surface
which prevents more mixing and on and on
stratification has increased five
percent in the last 60 years and
continues to grow one thousand years
from now
since the ocean floor is spreading at a
fast rate five centimeters a year in the
mid-atlantic ridge in a millennia it
will have spread a whopping
46 meters or 154 feet and in a scenario
with no reductions in emissions
scientists predict that the entire
greenland ice sheet will likely melt
causing 5 to 7 meters or 17 to 23 feet
of sea level rise
in 1 000 years the oceans may look like
this but
there are sponges over a mile beneath
the surface that are
thousands of years old they're one of
the earliest animals to evolve and
my guess is that in a thousand years
they'll still be growing strong but what
about 10
000 years in the future scientists
predict that if we just keep pumping out
co2 the earth will be seven
degrees warmer meaning the oceans would
rise a whopping
70 meters there'd be almost no mountain
glaciers left in temperate latitudes
greenland would give up all of its ice
and antarctica would give up almost 45
meters
worth of sea level rise to put this in
perspective a simple
10 meter increase would displace more
than 630 million people
nearly 10 percent of the world's
population at 25 meters
20 of humanity is left homeless of
course our most
accurate predictions really only go to
around that hundred year mark
not because we can't imagine that far
into the future but because
there are so many variables that could
change between now and then
and that's about as far as our computer
models go without creating a ton of
error but it will depend a lot on our
own actions as a species
and how we take care of this planet that
we're inhabiting some of the carbon
we're releasing right now
could be around for hundreds if not
thousands of years
and whether we take the necessary steps
to create a revitalized and healthy
ocean
not just in a thousand or ten thousand
years but even in 30 years
is up to us be sure to like this video
subscribe for more science videos and
we'll see you next time
peace