Comments on: A History of Earth's Climate

By: Eight worlds

Eight worlds — Tue, 09 Nov 2021 03:23:07 +0000

Join the campaign to reduce global warming, reduce air pollution, stop greenhouse gas emissions-https://www.youtube.com/watch?v=JjGnGd1TQbY

By: Eight worlds

Eight worlds — Tue, 09 Nov 2021 03:22:40 +0000

Easy to reduce air pollution, reduce global warming, don't want as you think -Join the campaign to reduce global warming, reduce air pollution, stop greenhouse gas emissions - https://www.youtube.com/watch?v=YPnCB47hnos

By: Justin Cosby

Justin Cosby — Fri, 05 Nov 2021 17:37:47 +0000

So how about this for a theory. Maybe the drastic temperature rise we see over really the last 100 years is a direct result of climate going back to exactly where it should be after coming out of the little ice age and the warming trend will now taper off. Look again at Marcotts graph. If you were to continue the warming trend the climate was experiencing before the " little ice age " the global average temperature we are experiencing today would be pretty much exactly where it is at today.

By: Johnny Latham

Johnny Latham — Fri, 05 Nov 2021 06:16:47 +0000

We should be showing this at COP26

By: Brian Crowther

Brian Crowther — Thu, 04 Nov 2021 09:19:21 +0000

This has some errors and omissions. The sun has gradualy heated up, it puts out 25% more energy now than when the solar system was made. CO2 and methane have been stored away by life to keep the temp roughly constant, this is via a feedback mechanism, see James Lovelock Gaia theory, Daisy World modelling. Tectonics has varied and this has varied the co2 put out. So the end of snowball earth was probably due to more co2 due to this (the breakup up of the supercontinent Rodina, the continents move in a cycle coalescing and breaking up, its to with thermal conductivity of the crust). The mass extinction 220mya was a combiination of things, the position of the super continent, Pangea, interior mostly dry desert as long way from sea. It had an ice age just prior, sth Australia, South Africa and Antartcica had ice. Sea level dropped, no continental shelf as result, extinction. Pangea breaks up, increase in volcanic activity, massive basalt sheets in India and Siberia (posibbly places like Greenland too) huge amounts of co2, temps rise by 5c, sea warms, methane at bottom of oceans move and cause further 6C rise, 11c total, mass extinction, 95% life wiped out. The boundary in the rocks is 200m below my house were I am writing this. Life gradually makes a come back to give us us via tha asteroid. CO2 and methane locked away by life in limestone and fossil fuels, keeps earth cool for life. Position of continenets helps with this.

Co2 levels getting so low plants have evloved c3 plants (grasses) instead of c4 (trees etc). The former better adapted to fire. earth only just able to be kept comfortable for life by plants sequestering co2 into limestone and fossils. At its limiyt. Lovellock reckons we have about 100 my before plants cant fight suns temp rise any more as not co2 left to put away. His book Ages Of Gaia has all this.

We are reversing this at out peril. Our civilisations evloved at a time of unsual niceness in the climate and relies on a nice climate. the loonies who think its OK to mess around with this so they get rich should be made to pull their heads in.

NIce video though overall. Thanks.

So there is a bit missing in this cast. I am a geolgist.

By: SamytheGreek

SamytheGreek — Wed, 03 Nov 2021 15:49:55 +0000

Who ever said that climate stability was for this planet, do you see any other planet with climate stability? Climate in the last 10,000 years has been the most stable ever on Earth, we are overdue for the next ice age. Sure, we have been polluting, warming and screwing up the planet in general and we can reverse a lot of that but make no mistake, we are going into the next ice age period no matter what we do.

By: Shane Lindie

Shane Lindie — Tue, 02 Nov 2021 15:48:19 +0000

Why do you have to talk so fast?? so appear intelligent? Take you time.

By: Shane Lindie

Shane Lindie — Tue, 02 Nov 2021 15:45:45 +0000

Global warming is a hoax.

By: George Stephenson

George Stephenson — Tue, 02 Nov 2021 04:56:20 +0000

Do you really think we can afford killing fossil fuel industry completely and relaying on renewable and green energy and fuel for power and transportation
Kill money save people
We need the change immediately not after 20 or 30 years it will be humans extinct long back
Communism means living without money
Killing God is not the priority or say it's the least important
Produce everything according to needs of the people
Today we produce according to the affordability of the people
Karl Marx hated money more than God

By: PraiseDog

PraiseDog — Fri, 29 Oct 2021 04:37:55 +0000

It has been said, but it should be said over and over, that was a major mistake, saying the asteroid was 200 km wide. Even the crater was not that big, the asteroid was 10 km wide. Apparently that error generated some interest, it seems that a rock that big would turn the earth into burning hell, uninhabitable even by all single celled life.