MWP & LIA In The Ross Sea

Reposted from NOT A LOT OF PEOPLE KNOW THAT

APRIL 11, 2021

By Paul Homewood

 We saw yesterday how 19th explorers discovered that the Ross Ice Shelf receded by 30 miles in the 19thC.

To add to that picture, this study found that elephant seals migrated to the Victoria Land Coast in the Ross Sea about 8000 years ago, as the region became warmer, and stayed there till about 1000 years ago when sea ice returned.

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https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1000554

Meanwhile another study shortly afterwards found evidence that the Ross Sea cooled significantly during the Little Ice Age:

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https://www.sciencedirect.com/science/article/abs/pii/S0012821X11002925

This all indicates that modern glacier retreats are just part of a much longer climatic cycle.

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Steve Case
April 11, 2021 2:33 pm

One of the arguments against the claims of Catastrophic Anthropogenic Global Warming is that what ever it is that they are claiming, it probably happened before.

There is very little that is new under the sun.

Pat from kerbob
Reply to  Steve Case
April 11, 2021 4:23 pm

It is why they fight so hard to erase it, with hockey sticks and proxies that “prove” it is warmer now than even the Holocene optimum despite endless physical evidence it was warmer back then.

They are religious but their faith in their beliefs is weak.

Tom Abbott
Reply to  Pat from kerbob
April 12, 2021 7:46 am

“It is why they fight so hard to erase it,”

Exactly.

commieBob
April 11, 2021 2:38 pm

How do they get to publish this stuff? It contradicts ‘the narrative’.

Scissor
April 11, 2021 2:39 pm

C’mon. We know that seals can be trained to clap and balance a ball on their nose, but they’re really not that smart. According to Michael Mann, they must have been mistaken.

Jim King
Reply to  Scissor
April 11, 2021 3:57 pm

They can’t play hockey with sticks!

john harmsworth
Reply to  Scissor
April 13, 2021 12:26 pm

Michael Mann is no doubt planning on an expedition to core into these seals to examine them internally and shut them up once and for all!

saveenergy
April 11, 2021 3:12 pm

But the science is settled –
a ‘Distinguished Professor’ told us yrs ago there was no LIA, … & he had a bald head & a NoBalls Prize & numbers & big words & a picture with lines on & everything !!

taxed
April 11, 2021 3:29 pm

l think it was very likely that the LIA affected both the NH and SH. As it looks like to me that low sun spot activity affected the jet stream right across the globe. l think it affects were felt more in the NH because there is much greater landmass there and that’s where the most people were to record its effects.
Here in the NH l think what’s key to understanding what was going on during the LIA. Was how the change in the jet stream forced high formation away from the Hadley cell area and to form further to the north over the eastern Pacific and north Atlantic. While also stalling the weather patterning so it was remaining over an area for longer periods in time. The current state of the jet stream is pointing me to the reasons how both these things could happen.
.

Jim King
Reply to  taxed
April 11, 2021 4:00 pm

Along these lines, I recall that back in they day when Mann published his tortured data there was some chatter that perhaps the NH and SH were 180%deg; out of phase.

taxed
Reply to  Jim King
April 11, 2021 4:20 pm

Yes l have heard that the LIA was confined to the NH. But the current state of the jet stream suggests to me that was wrong.
l think its because there is much more ocean in the SH. That any changes in the jet stream had less impact.

david anderson
Reply to  taxed
April 11, 2021 4:36 pm

A lot of peer reviewed studies indicate the LIA was global. Go to CO2 Science web site.
http://www.co2science.org/

It is well documented.

Burl Henry
Reply to  Jim King
April 11, 2021 8:09 pm

Jim King:

The Central England Instrumental Temperatures data set (1659-present) spans about one third of the LIA, and is probably representative of the full LIA.

All LIA temperature decreases within that period show complete correlation with volcanic eruptions around the globe, so all hemispheres would have been affected at the same time.

https://www.osf.io/bmu69/

Reply to  Jim King
April 12, 2021 2:55 am

…there was some chatter that perhaps the NH and SH were 180%deg; out of phase.

I was thinking that as I read the article.
I’m no climate scientist, or even just a climastrologist, but I once (ca. 2016) got irritated enough to write up a layman’s explanation for climate change, and yes, there definitely is a mechanism for 180 degree phases between the two hemispheres, something I believe is actually happenening right now (as it’s always been, after six years of “new data, I’ve only ever had to change spelling mistakes).
The pictures are real amateur, the prose is very unpoetic and I don’t hardly never give no references, but here you go:
https://greenpets.co.za/index.php/en/2-greenpets-natural-happiness/136-climate-change

philincalifornia
April 11, 2021 4:43 pm

8,000 years ago humans had only 12 years to save the planet.

PCman999
Reply to  philincalifornia
April 11, 2021 9:55 pm

And they did it! They threw away all their cars and electrical devices, everything that made living in the copper age worthwhile and returned to the Neolithic for the sake of the planet. Green neofascists expect no less sacrifice from us, today.

tommyboy
Reply to  PCman999
April 18, 2021 5:51 pm

I loved the copper age, there were bright copper kettles and warm woolen mittens.
All my favorite things.

Reply to  philincalifornia
April 12, 2021 2:54 am

Ok that made me LMAO!!!!!!!!!!!!!!!

Reply to  philincalifornia
April 12, 2021 2:56 am

Well, from the current state of our State, I would say the blighters failed…

john harmsworth
Reply to  paranoid goy
April 13, 2021 12:30 pm

Seems to indicate that we’re dumber now than we were 8,000 years ago, anyway.

April 12, 2021 2:52 am

Oops more evidence the LIA wasn’t local?

Weekly_rise
Reply to  bob boder
April 12, 2021 6:50 am

The current understanding is not that the LIA was local, but that it was not a globally synchronous event. See, e.g., Neukom et al., 2019.

Last edited 25 days ago by Weekly_rise
H. D. Hoese
Reply to  Weekly_rise
April 12, 2021 7:55 am

Weekly
https://www.nature.com/articles/s41586-019-1401-2
Last line of abstract
“This provides strong evidence that anthropogenic global warming is not only unparalleled in terms of absolute temperatures5, but also unprecedented in spatial consistency within the context of the past 2,000 years.”

Paper paywalled so it could be in there or references, but the ‘firm’ conclusion needs an explanation of how certain areas of ocean and land were left out. I see this too frequently in fisheries/ecological papers where the blame is put on something people did such as overfishing, wetland loss, climate change, etc. I once sat next to such a modeler during a ‘robust’ discussion who said something to a colleague like–“…well, it would still be due to people.”His fisheries models didn’t work out very well. Credibility is better when you separate the assessment from the (preferred) management.

Jim Gorman
Reply to  H. D. Hoese
April 12, 2021 11:22 am

“but also unprecedented in spatial consistency within the context of the past 2,000 years.”

If one believes that current warming is happening everywhere and is consistent with with the Global Average Temperature, one should look more closely at what is occuring in the globe. There are currently regions with little to no warming and even cooling when regional temperatures are calculated. That should lead one to the conclusion that GAT is not an accurate description of temperature at any location.

Ulric Lyons
April 13, 2021 4:16 am

1000 years ago was during the Oort solar minimum, when the Arctic was warming. The polar see-saw effect in action.

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