(dang. Vivaldi just crashed ...lost the toot and ALT texts!)

I look at these collages not as scientist, which I aint, but to get a more informed feel for the #ColdBlob in the North #Atlantic #Ocean which shows up in models and in reanalyses.
And to get a feel for the actual available measurements, their spread and their possible weirdness.

So the 2 pictures cover September average ºC from 45ºN to 60ºN, 322-337ºE or 38 - 23ºW in 7 water depth groups 1975 to 2022.

Can you spot weirdness?
That's because there IS weirdness in the data, as I'll show later.

I describe notable non-weird and weird features in the ALT text.

I organised the measurements in groups for depths from 0 down to 2000m and latitude and longitude ranges so the #ColdBlob is covered in 211 groups (thank god for #awk arrays!).
An individual chart then shows 7 columns: ºC in Sept 1975-2022 (where available; the line is "interpolated" for missing data) at eg.,
52.01-54.9ºN, 322-324.9ºE, called "55_325", with lines for ºC in depth groups of down to 10m, 60m 150m, 400m, 700m, 1000m, 2000m.
And the collage in the next toot is of multiple charts, organised according to the covered latitude and longitude, 60ºN to 45ºN from top to bottom, 322º-338ºE from left to right (38ºW to 22ºW).
Data from 2000 to 2022 is continuous.

How to VErY quickly duplicate #charts without having to edit the data ranges manually: #Excel CTRL+D duplicates a chart, then simply drag the highlighted column range to the new range https://yewtu.be/3u4TU1PbhAk

I usually plot stuff in #LibreOffice #Calc but for this one purpose, I reanimated my ancient #MSOffice 2011 for Mac. Very handy feature.

I'm plotting September temperature averages from actual measurements in the #ColdBlob in the North #Atlantic. Data from the World Ocean Database https://www.ncei.noaa.gov/access/world-ocean-database-select/dbsearch.html

I needed to know where the #Tolkien #LotR names come from in above article about the sudden warming and sudden halt to that warming in the #PETM.
Turns out it's a whole cluster of #MiddleEarth names on or near the Rockall Plateau. And some belong officially to #Ireland as their Marine department states in their article on "The real map of Ireland": https://www.marine.ie/site-area/irelands-marine-resource/real-map-ireland-0

But not all.
Here are all worldwide officially approved seafloor features named after Tolkien's Middle earth:

Edoras Bank, -22.166667, 56
Eriador Seamount, -25.333333, 54.833333
Fangorn Bank, -20.166667, 55.5
Gondor Seamount, -23.833333, 54.25
Lórien Knoll, -19.83333, 54.16667
Rockall Plateau, -18.83333, 56.33333
Rohan Seamount, -22.333333, 54.75
Isengard Ridge, -21, 52.416667

This last one is East of Argentina:
Hornburg Hill, -50.3508, -41.93471

Found them all here in the official global catalogue of named seafloor features: https://www.ngdc.noaa.gov/gazetteer/ by choosing a vector and exporting the results to CSV. Do it a few times to get all angles of the globe. Then a onliner #AWK for $0 ~/Tolkien/ and Bob's my uncle.

This long and interesting blogpost covers the Rockall / Gondor / Eriador area in more detail https://www.volcanocafe.org/rockall-the-lost-continent-of-middle-earth/ wrt #geology and history.
But the idea that all those mounts between Scotland and Greenland might have been "hop-able" is curious. Sea level must have been far higher than today. 65m higher from the polar ice caps, then add all the small mountain glaciers. AND it was so much warmer and hence, sea water had expanded, too. Dunno what the term is now, thermosteric or thermostatic or something?
But in any case, paired with the article in #1, a read well worth my time.
I even took away something for my quest wrt #AMOC slowdown because the area is in the region of the #ColdBlob

#Tegtmeier
🎶 What you don't know you'll need to explain on your own.
Was man nicht selber weiß, das muss man sich erklären. 🎶

When I was a teenager, Tegtmeier was a German TV figure 1984-85, played by Jürgen von Manger. In the show, he travelled Europe and explained to himself and his audience all kinds of stuff he found curious. His explanations were based on his common sense alone.
And he sang that little tune "Was man nicht selber weiß, das muss man sich erklären." 🎶

Now, since I became #climate aware, my guilty conscience (WHY didn't I get it earlier?!?!?) and natural curiosity has me tegtmeiern a lot. See? I used the name as verb, with the German infinitive "n" at the end ! Cause that's what I'm doing when I go on a quest to figure out how stuff works in the big eco and climate clusterfuck: I tegtmeiere ("e" = suffix for verb in presence, first person singular).

Using my common sense alone isn't enough, of course.
But still, having to catch up in soo many areas unknown to me until 2018, I feel the need to preserve my self-image at least a little bit. Not knowing stuff wasn't a prominent part of my self-image before – unless coupled with successful tegtmeiern. It's a
personally disorienting experience, having ignored for most of my life THE most existential topic of all time, and now, based on that big unknown, having to re-design all of my philosophy and values.

So when I come across something I don't know and find curious enough to explain to myself, I apply my uneducated, unfactual common sense as first pointer to where to search for answers. Humming #Tegtmeier 's silly, little tune to myself: 🎶 What I don't know myself, I'll find an explanation 🎶
And I decided that I'll be using #Tegtmeier as hashtag for my quests here in the Fediverse.

Next two #Tegtmeier topics: #clathrate #ClathrateBomb
and #AMOC slowdown.
I pulled ocean temperature measurements from the World Ocean Database for the topic of the clathrate scare.
And once I had gotten a feel for the data and what I can and can not do with it, I pulled some more data for the wider region around the #ColdBlob

When I get around posting about the two things, watch out for the hashtag #Tegtmeier .

💃 🎶

Excelente entrada de @rahmstorf en RealClimate mostrando, con un cálculo de reverso de sobre, que el enfriamiento de las aguas cercanas a Groenladia (el conocido como Cold blob) se debe al efecto de una desaceleración de AMOC del 15%, un efecto más de mil veces mayor que el efecto directo del agua de deshielo de Groenlandia.

#ColdBlob #AMOC #Greenland

https://www.realclimate.org/index.php/archives/2022/12/the-water-south-of-greenland-has-been-cooling-so-what-causes-that/