The Last Ice Age Temperatures - Summer
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- Опубликовано: 6 июн 2024
- I'd like to share you the first step of a long-term project to model the last glacial period climate, instead of restrict my simulations to the last 21,000 years. Here the world temperatures over the last 120,000 years !
This video focuses on summer temperatures
0:00 Intro
1:20 The Last Interglacial
4:56 Onset of the Last Glacial Period
6:02 Warmer Intermediate Phase with cataclysmic events
8:41 Coldest stage of the Last Glacial Period
9:31 Onset of the Last Deglaciation
10:07 The current Interglacial, Holocene
-- SOUNDTRACK --
BT - Dreaming (Eric Kupper's Hysteria Club Mix)
Delerium - Fade (Fade Sanctuary Mix)
Sade - No Ordinary Love (Euphrasia Mix)
Cyberpunk 2077 - Isometric Air
Hilight Tribe - Blue Resonant Eagle
Flatlander Woman - Lithium
Pool Boy - Closed for Renovation 
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Man, Southeast Asia looks like paradise with these maps... still tropical, but with much cooler summers. No wonder humanity made it to the Sunda shelf and Sahul so early. One of the few areas with good rainfall even during the coldest driest stadials too iirc. Wonder what happened to the tropical ocean currents to cause that? Judging by the warm Alaska, the Kuroshio current did some crazy stuff, so maybe the southbound Mindanao current weakened which cooled off that area? Just guessing here, I doubt there's a concrete answer though...
But in my city (Cirebon ~230km from Jakarta) the temperature rise in the summer up to 37°C in the afternoon. The city that not far away from cirebon also very hot ( 38°C avg ) it can rise up to 40°C which is the hottest temperature in indonesia (and maybe southeast asia) our city is not raining for 3 months 😢
El nino, dry cold wind, and global warming rising temperature
I don't know why sundaland is colder than now.
@@tansuitin4055 lower insolation
NOTE : at 2:26 something messed up in the simulation, I don't know what (and why) ;)
and at the top right corner it's not winter but summer ...
epic fail
False text detected : Earth |winter| temperature
Bro forgot to pin
Montreal looks hellish… below freezing in the summer at times, going as low as -60 in the winter… I’m Canadian and that seems cold.
Hey! I was fascinated by your video on what would happen to Earth if a Chicxulub-level asteroid were to strike again.
Would you be able to make a video graphing the impact that occurred during the 1883 Krakatau eruption? I've just recently heard of this natural disaster that killed 36,000 people.
I find it crazy that this eruption produced a sonic wave that would have killed everyone within 25km in an instant.... Though Krakatau was largely uninhabited, I'm not sure I can really visualize how far 25km and if that was far enough to reach other islands.
Seeing you demonstrating this within a video would be fascinating!
Absolutely amazing work! Crazy that summer temps here in my area (central Med) were nearly 10°C lower than today during the LGM.
i wonder why Alaska and Beringia had positive anomalies in the same period.
It would be interesting to get separate data for Alaska and the western part of the Yukon state at the peak of the anomalies. Judging by the map, the weather there is incredibly hot at this time
the goat RETURNS 🔥
Mmmm
I would have expected northern europe to be as dark a blue as eastern North America yet it is seems to be significantly warmer for most if the time.
Also Alaska keeps surprising me with it even having shades of red from time to time during glacial periods.
The region around the Ural mountains also seems to have commonly been warmer than today.
Europe was constantly "protected" by Gulf Stream and North Atlantic Drift (excepted during Heinrich events). The european ice sheet was also much smaller and was even gone during all the Marine Isotopic Stage 3
@@Kaldisti Thanks!
I have wondered how large these ice sheets actually were. I have read on Wikipedia once that the Cordilleran ice sheet had about one and a half times the amount of ice the Antarctic ice sheet has today, I haven't managed to find anything more specific about ice sheets sizes.
If it is possible, would you be able to some day include that on a future video?
@@stefanpfeiffermerino7633
During the Last Glacial Maximum :
The North american ice sheet : 11 million square km
The Scandinavian ice sheet : 5 million square km
The Iceland ice sheet : 150,000 square km
The Greenland ice sheet : 3 million square km
The Patagonian ice sheet : 350,000 square km
The Antarctica ice sheet : 15 million square km
There were also thousands of mountain glaciers in New Zealand, Tasmania, Japan, Alps, Caucasus, Himalaya, etc.
I'm going to make one day a Lost World video about the whole word x)
@@KaldistiI will look forward to that. Also big fan of your videos.
@@Kaldisti Thanks!
Is there a reason why Greenland's ice sheet didn't melt at the end of the glacial period while the neighboring ice sheets like the Laurentide and Scandinavian ones did?
Is there a better combo than last glacial period climate simulation data and banger EDM tracks?
Great work!
Question: do you intend on doing something like this but for climate classifications?
Indeed, I have to make another model about rainfall but I did not yet find a satisfying solution
@@Kaldisti It would be tricky.
@@KaldistiI’ve got an idea. Why not simulate the eruption of tambora, except 10X worse, and in our modern day?
Why is Alaska so "hot" and Québec so cold
I'd imagine its because jetstream and currents bring in fresh cold air and water which cools down quebec area and I believe there isnt a cold current near alaska, only a warm current which will warm the area up.
You have to remember that the Bering sea wasn't there during the glacial periods (due to lower sea levels) which would drastically alter ocean currents. That's my guess, since the warm waters of the tropical Pacific move clockwise in the northern hemisphere. Without cold Arctic Ocean waters mixing in, there would be more heat left to bring to Alaska. The Oyashio current would be entirely eliminated, leaving the Kuroshio to dominate.
Thanks
@@StuffandThings_ So if we dammed up the Bering strait Alaska would be warm?
@@VPWedding Potentially, though there are more complex factors at play. You'd also probably need to dam the straits between Korea and Japan (which were also dry during the last glacial maximum) and which part of the Kuroshio current passes through today cooling it off. Such changes would have absolutely drastic consequences though, and this is still only part of the puzzle as climate is ridiculously complex. Fun thought experiment but about as bad of an idea as damming the straits of Gibraltar in reality.
What caused a sudden spike in temperature 108 thousand year ago ?
Do you intend one day making a simulation of snowball earth temperatures ?
I have a question. On your Vredfort impact video, where did you get the classification for a hypothermal climate? I don’t remember it being part of the Koppen system
It's my personal Koppen classification. During glacial periods there were some climate conditions without modern analogues.
@@Kaldisti At some point carbon dioxide deposits at standard pressure. Upon an ice sheet, deposited carbon dioxide would suggest unbelievable cold because the sublimation point of carbon dioxide is sensitive to pressure.
By the way -- what is the threshold for "hypothermal"?
When doing these simulations.
Was there something unexpected or interesting that caught your attention?
Alaska, the observed pattern is really surprising
What caused the heat flash between 5e and 5d?
the simulation entered in the yolomode
Why is Singapore having colder summer during the last ice age, something to do with Sundaland?
Less insolation, the main mechanism driving ice age / interglacial cycles
Can you simulate an asteroid with a diameter of 100 kilometers hitting the earth?
Summer temps below freezing in eastern Canada, yikes 🥶
The ice sheets must hae been extremely tall in northastrn North America. Montreal is practically at sea level.
Precipitation must have been consistently high throughout the times of North American glaciation, which explains how the ice sheets could reach as far south as 38 N (St. Louis, Louisville).
@@paulbrower Yeah, its amazing how tall ice sheets can get, tall enough to have very significant effects on the temperature. One of the big concerns with melting in Greenland is that as the ice sheets get lower, they'll get less cold and trigger a feedback loop. I'm not sure whether this simulation included the elevation changes though, seeing as sea levels are shown to not change even though these would have a significant effect on ocean currents, placement of shallow seas for temperature regulation, and height relative to sea level of some currently low lying areas. Precipitation was notably much higher than today throughout the American west (lots of lakes in current desert regions) which is actually pretty unusual for a glacial maxima as the cold air tends to lead to reduced precipitation during these periods. Not sure what the precipitation was elsewhere on the continent but there definitely is a minimum needed for ice sheets to form (East Siberia, despite being absurdly cold, did not have the precipitation to form any ice sheets during the LGM). Either way Canada and North America in general seem to consistently stand out for their changes during these periods, its absolutely insane.
@@StuffandThings_Antarctica is well protected by circumpolar ocean currents. even with 5C global warming from now Antarctica inland will still have ice sheet. Greenland may get completely melted
Yep, the Laurentide was basically the northern hemisphere's answer to Antarctica and it likely got just as cold as modern Antarctica does.
@@wanhl2440 I'm not so sure about that. Most of Antarctica has already warmed by around 4C at 1C of global average warming. 5C of unmatched rapid warming would, if it wasn't enough to destroy the ice sheet on its own, likely initiate tipping points and positive feedback loops that eventually collapsed the ice sheet over centuries or millennia. We would not be able to come back from such a degree of warming (literally) due to the immense, humanly irreversible changes in global climate it would cause. Current climatic phenomena would violently mutate or cease to exist altogether and new ones would appear in their place that maintain the status quo of this new order. Trying to reverse this would take just as much, if not even more effort than it currently is to warm the climate and would likely cause even more damage at that point. Besides, humanity as we know it has almost certainly ceased to exist at 5C as the world our society operates in has been totally destroyed and replaced with something that in all likelihood is totally alien to us. We, like much of the rest of the animal kingdom, would go extinct at 5C of warming.
is the top right corner supposed to say winter
shit I missed it ... you're right
Hi everyone!
To provide a more complete description of the last ice age climate for the past 120,000 years, I have combined this video with the summer solar insulation in the Northern Hemisphere from Kaldisti's Milankovitch cycle video to show the relationship between the level of solar forcing in the Northern Hemisphere during the past 120,000 years and the ice age climate during the same time period.
Here is the video for it in case anyone is interested: ruclips.net/video/29J25ENFEQI/видео.html
When autumn?
We don't need it
Why does it say earth winter temperature?
forgot to change it
@@Kaldisti Almost the exact same thing happened to me yesterday.
Why was Canada such cold in the past??? Labrador peninsula 🥶🥶🥶🥶🥶🥶
4km thick ice sheet above x)
@@Kaldisti omg!! It's like a Antarctiсa!
@@Kaldisti Yes -- elevation. Take away the ice sheet, and Montreal has close-to-hot summers. Montreal gets a long summer at a low altitude (near sea level) deep inlad wih respect to prevailing winds.
why before 1950
1950 is the reference year for archeology and environmental sciences. It comes from radio carbon datation, discovered in 1950
@@Kaldisti "2000" would allow easier calculations... but 1950 is before the contemporary take-off of global warming. This would not have been known in the late 1970's, when 2000 was obviously closer. Some projections have asan example any semblance of winter disappearing from northern India, France and southern England becoming genuinely hot in the summer, and Chicago and Boston having rainy instead of snowy winters.
total tundra
FIRST YES PLZ PIN
Well if you are an a*shole about it of course you will get it.
If only he wanted to do a pin of shame