Earth Warmer than Today, Much of Past 10,000 Years

GISP2 core, ending at 1850, shows that 1850 had the coldest source area (for snow that forms core) compared to earlier parts of that core. In other words, lots of time before 1850 was warmer than 1850 in Greenland.

Now, Greenland is warmer than that entire 'stack'. Yes I knew we'd hear this again

We'll hear it again, too. Later. Bet on it.

 

MCA might have been warmer than previously determined@18. Yes I made a request to sift through that long list. No response there yet.

We certainly should work (and spend climate research money) to understand MCA better. So far it shows evidence of short regional +T. At different times in different places.

Yes, +CO2 infrared trapping would have shown uniform global effects. More like now.

 

You should read up on ice ages. Some started after the arrival of photosynthesis or photosynthesizers' population expanded. Cyanbacteria and plants became carbon sinks, and dropped the prevailing CO2 levels down enough to allow cooling. The arrival of oxygen could have also reduced the levels of methane, which is a stronger green house gas than CO2. Volcanoes and the sun also played a part.


The big ice ages precede that chart in history, and notice that it only includes the GEOCARBIII measurements, but cuts off the steep climb of CO2 levels that would start from the edge of the graph. This one includes that.
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But the precision of the GEOCARB III measurement could be of, and there might have been a bigger dip in CO2 levels than thought preceding ice age at the 445 mil years ago mark.
Did changes in atmospheric CO2 coincide with latest Ordovician glacial–interglacial cycles? - ScienceDirect
But this is mostly academic to discussions on today's climate, because none of us would be happy with 3000ppm of CO2 in the air regardless of the temperature. Honestly, the world back then might as well have been another planet to the point of view of humans.

The other more 'recent' ice ages did have a decline in CO2 preceding them, but I find the sudden up tick in levels before the Permian to Triassic periods more interesting. The Permian ended with the Great Dying, the worst extinction event seen on Earth. It is the only extinction event to include insects. Think about that, cockroaches look back on it with the thought, "those were dark days."

That spike of CO2 increase of roughly 1000ppm could have happened in as little 2100 years.
High-precision timeline for Earth’s most severe extinction

I'm sure we will all be fine as long as our CO2 emission rates stay below that.

well, shit.

 

This chart stops at 2009. Does anyone have a link to a newer combined illustration?

I know that if updated to 2016, both T and CO2 are over the top of this graph's upper scale.

 

No link to update. Can say that HADCRUT was 0.48 oF higher in 2016 than 2009. Mauna Loa CO2 was 16.9 ppm higher in 2016 than 2009.

It would always be better to compare logarithm of [CO2], because that's how energy absorption works. Rescaling vertical axes for appealing 'visual matching' will make you friends in some circles but not in others.

But anyway, there has been (several times interrupted) T increase since 1880. Continuous CO2 increase over the same period, possibly interrupted during WWII. Not sure whether that interruption is accurately known.

 

In February, the Karl/Bates/Daily Mail matter came up. I suggested to folks at the time to be brave and read Bates' actual words in Associated Press story.

Apparently that was ineffective, so here is a different tactic.

I command all of you to not read:

Major global warming study again questioned, again defended

 

I now wonder if these people want the unadjusted CAFE mpg figures on cars' window stickers.

 

You might consider going to Berkeley Earth for the temperature data and Mauna Loa CO{2} data. Stuff them into the spreadsheet of choice and graph. For good measure, add sea level data from the Jason series. For fun, add solar radiance, a popular straw grasped by some climate deniers.

I've got some tire temperature profiles to take with my FLIR tonight so it'll be a few days before I get around to it.

Bob Wilson

 

The Dake Page: Carbon Dioxide (CO2) - The Smoking Gun of Climate Change

 

Building my own, this is what I have so far. Beware that there are some problems with it, such at T averaged from May-April (lastest available, through April 2017) not Jan-Dec, 2017 CO2 is just a May delta over May last year, etc. Older CO2 from a Swiss global source, Keeling from Moana Loa only. I'll try to fix things up over the next few days.

 

Earth Cooling At The Fastest Rate On Record | The Deplorable Climate Science Blog

As always, follow the $$$$.

Al Gore and others going to climate change conferences in big private jets and SUVs.

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Works for me. <PLOINK>

Bob Wilson

 

Graph @32 is a nice job making something I'd not want to look at.

Somehow, we have drawn in a new poster to this topic. RSS sat-proxy-T is in (a few months of) -T after 2016 El Nino leading us to...what?

paranormal @33, are you inclined to make any T predictions on any time scale? If so, lay your stuff down. If not, do not suppose that tossing off 'bad' about climate-concerned folks can distract from larger (you ignore) money following.

Dang, how did you reach a lightweight conclusion that saying "Gore" and 'Follow the money would lead us to New Knowledge? We have been on this hunt for years unto decades. Did you notice that you said nothing new?

 

Follow the $$$. Period.

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Climate Change: No, It’s Not a 97 Percent Consensus | National Review



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The Pause lengthens yet again | Watts Up With That?

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Something here is seriously whacked. When I plot their claimed data, I get a very different ending.

Here is the claim (and note that they are using remote measurements of a single layer of the atmosphere to represent the global temperature):




But when I plot the linked datafile, I get this:



Would you care to track down just why your source's published chart doesn't match the data they linked?

Then, later, we can talk about the cherry-picked start and end dates.

 

There are a lot of variables in play here over earth's history:

1. The further back in history you go, the thicker the atmosphere used to be. This means there was more of an insulating blanket in the past.
2. The rotational axis of the earth changes over time (precession) and goes through a cycle that phases toward and then away from the perigee of Earth's orbit. This is what drives the ice ages.
3. The further back in history you go, the shorter earth's day was. The rotational speed has an effect on ocean circulation patterns. When the dinosaurs ruled the earth, the day was only 14 hours long.
4. The further back in history you go, the closer the moon was to the earth, which means the tides used to be higher.
5. Earth is slowly transferring energy to the moon which makes the moon's orbit slowly grow while also gradually slowing down the Earth's rotation. (See above.) Eventually they will be tidally locked. This creates the occasional need for a leap second.
6. The continents on the earth move relative to each other, causing oceans to come and go and circulation patterns to change over time. This is continental drift. Its long term effect on weather patterns is huge.
7. Asteroid impacts can rapidly change conditions on earth, causing widespread devastation and wildfires. The biggest impacts can also crack Earth's crust and cause increased vulcanism.
8. Originally Earth did not have any free oxygen. The atmosphere was a hot house of CO2 and nitrogen. When plant life (think slime) appeared, it consumed CO2 and released oxygen. Over millennia, the oxygen levels rose and fell depending on what kind of life was present at the time.
9. The orbits of the planets around the sun migrate over geologic time. The tug of Jupiter and Saturn are the main cause of this. We still do not have a good handle of where Earth's orbit actually was in the distant past. This determines the amount of solar heating the Earth receives at any given time.
10. Over geologic history, the Sun's output has not been constant. It is slowly increasing. There are also short term cycles in the Sun's output layered over the long term rise.
11. Humans are continuing to pump more CO2 into the atmosphere, changing the current balance of all of the above's effects. Naturally this is causing the climate to adjust to a new balance point driven by the relative speed of the change. Granted the climate is always changing on its own, but at a much, much slower rate than we see happening now.
12. As a species, we are still technologically young, and only now are we coming to understand how we impact the climate.

So then, with all of the above variables in mind, all we poor humans can do is try to understand what is going on with the climate, what changes are coming, what we can do to mitigate the changes, and what adaptations we need to make to live in the future climate we will all inherit.., no matter who did or did not cause it.

Bill the Engineer