anlomedad<p>edit: added another image. <br><a href="https://aslopubs.onlinelibrary.wiley.com/doi/full/10.1002/lol2.10455" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">aslopubs.onlinelibrary.wiley.c</span><span class="invisible">om/doi/full/10.1002/lol2.10455</span></a></p><p>Amazing! <br>And <a href="https://climatejustice.social/tags/openaccess" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>openaccess</span></a> ° <br>Also, the references in the paper are a treasure trove. </p><p>20,000 days in the life of a clam shell 10 mio years ago in the Indonesian Throughway shows heavy rain events, seasons and what the authors say is a proto- <a href="https://climatejustice.social/tags/ENSO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ENSO</span></a> cyclicality, dominated by <a href="https://climatejustice.social/tags/LaNina" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LaNina</span></a> . <br><a href="https://www.sciencedirect.com/science/article/pii/S0031018224007004" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">sciencedirect.com/science/arti</span><span class="invisible">cle/pii/S0031018224007004</span></a></p><p>When you hear "dominated by La Nina", is your mind jumping to AMOC slowdown and tipping? Mine does.</p><p>The longterm climate records stored in this clam species can indeed show early warning signals for AMOC's tipping behaviour. In this paper, Arellano-Nava and D.J. Reynolds et al 2024 look at up to 500 year old (!) clams from the Northern Atlantic, document the approach for finding Early Warning Signals, and see a slowdown since 1750 <a href="https://aslopubs.onlinelibrary.wiley.com/doi/full/10.1002/lol2.10455" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">aslopubs.onlinelibrary.wiley.c</span><span class="invisible">om/doi/full/10.1002/lol2.10455</span></a></p><p>Light slowdown since 1750 was already visible in Thornalley's <a href="https://climatejustice.social/tags/AMOC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AMOC</span></a> reconstruction from 2018. He used sortable silt grain sizes near Iceland and near the Canadian coast .<br>So a different proxy showing the same slowdown. <br>I took the liberty to superimpose Thornalley's and also Rahmstorf's AMOC reconstruction over vanWesten's AMOC in their freshwater experiment to show the striking similarity, see picture 3. </p><p>But a gradual, even slowdown isn't an actual Early Warning Signal for tipping behaviour where <br>"...it flickers, then it tips...". </p><p>For AMOC's tipping behaviour, van Westen's team last year identified various Atlantic locations in various depths, none are in the classical research locations in the Northern North Atlantic ! Particularly not in the <a href="https://climatejustice.social/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a>... See the two map images from the supplement with the AMOC schematic by Chidichimo et al 2023. <br>It's still only a preprint tho, first author Emma Smolders <a href="https://arxiv.org/pdf/2406.11738" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/pdf/2406.11738</span><span class="invisible"></span></a> </p><p>If I understand it correctly, the clam species lives on continental shelves in shallow-ish waters, not in the ocean abyss. So most locations Smolders et al identified are probably not good for using clams in reconstructing AMOC during the late <a href="https://climatejustice.social/tags/Holocene" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Holocene</span></a> or in <a href="https://climatejustice.social/tags/paleoclimate" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>paleoclimate</span></a>. But some are, eg around the Canary Islands near Africa on 30°N, and many on the shelf along South America. <br>Especially important because the monitoring arrays (dashed lines in Chidichimo's schematic) have only been installed very recently. But clams can provide a continuous, annual to daily climate record everywhere – in shallow-ish waters.</p><p>I'm feeling actual excitement in the hope that researchers are now combing the ocean floor for these shells in the identified locations...</p>
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#coldblob
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anlomedad<p>Guter Podcast zum Cold Blob und AMOC <a href="https://www.ardaudiothek.de/episode/iq-wissenschaft-und-forschung/raetselhafte-kaelteblase-geraet-der-subpolarwirbel-aus-dem-takt/bayern-2/13795411/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">ardaudiothek.de/episode/iq-wis</span><span class="invisible">senschaft-und-forschung/raetselhafte-kaelteblase-geraet-der-subpolarwirbel-aus-dem-takt/bayern-2/13795411/</span></a></p><p>Mit <a href="https://climatejustice.social/tags/Rahmstorf" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Rahmstorf</span></a>, eh klar, aber noch eine Forscherin ist dabei, die speziell Interessantes erzählt. </p><p>Hab wieder was dazu gelernt. <br>Zum Beispiel ziemlich am Anfang, zum Subpolaren Wirbel, wie der überhaupt entsteht. <br>Durch Wind!<br>Der treibt das warme Golfstromwasser auf der Höhe New Yorks nach Osten. Und dort gibt es dann irgendwo so eine Art Kreuzung, wo der Wind nach Norden oder weiter nach Osten geht. <br>Wenn er nach Norden geht, treibt er damit auch den Wirbel an. <br>Und dann weht er auch mal vo Ost nach West... im Winter wohl..<br> <br>Im Filmchen sieht man die v-Wind Komponente in den Wintermonaten. V-Wind ist rot, wenn der Wind nach Norden weht. Und blau, wenn er nach Süden weht. Daten: <a href="https://climatereanalyzer.org/research_tools/monthly_maps/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">climatereanalyzer.org/research</span><span class="invisible">_tools/monthly_maps/</span></a></p><p>Der Subpolar Gyre / Cold Blob ist auch nich immer an derselben Stelle, fest eingemauert oder so. Nee! Das wabert alles so fuzzy rum, mal mehr rechts und mal mehr links. <br>Und je nachdem ob mehr rechts oder mehr links, gibt es in Zentraleuropa starke Hitze. </p><p>Muss auch gucken, dass ich ein paper von ihr finde. Vll steht ja in der "Introduction" noch mehr Interessantes um Subpolar Gyre drin. </p><p><a href="https://climatejustice.social/tags/AMOC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AMOC</span></a> <a href="https://climatejustice.social/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a> <a href="https://climatejustice.social/tags/SPG" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPG</span></a> <a href="https://climatejustice.social/tags/SubpolarGyre" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SubpolarGyre</span></a></p>
anlomedad<p>My girlie chart with 490ky years of <a href="https://climatejustice.social/tags/Milankovic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Milankovic</span></a> cycles, CO2, sea level, and the top line is d18O of a sediment core from within the <a href="https://climatejustice.social/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a>, see map. I think, it records AMOC shutdowns in the past. </p><p>Would be intriguing to know why it shut down. Eg, 427ka, "just" before the interglacial MIS11. <br>And why it not shut down during that very long interglacial which was ~as warm as the Holocene, <br>and had an ice-free West <a href="https://climatejustice.social/tags/Greenland" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Greenland</span></a> (with a leaf found just 2 years ago at rock-bottom of an ice core from there),</p><p>and why AMOC instead collapsed in the middle of the following <a href="https://climatejustice.social/tags/iceage" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>iceage</span></a>. </p><p>The very long interglacial MIS11 with its ice-free West Greenland and stable AMOC throughout tells me that the amount of freshwater input from melting ice on its own isn't the trigger for a collapse. But instead, the speed at which freshwater is added: very slowly like during <a href="https://climatejustice.social/tags/MIS11" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MIS11</span></a> won't do it. </p><p>Also intriguing: why the stuttering motor during the last glacial before the <a href="https://climatejustice.social/tags/Holocene" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Holocene</span></a>?</p><p><a href="https://climatejustice.social/tags/d18O" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>d18O</span></a> from sediment cores at other locations strictly follow the ups and downs of <a href="https://climatejustice.social/tags/sealevel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sealevel</span></a> and <a href="https://climatejustice.social/tags/CO2" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CO2</span></a>. This one site <a href="https://climatejustice.social/tags/IODP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>IODP</span></a> <a href="https://climatejustice.social/tags/U1308" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>U1308</span></a> is exceptional. <br><a href="https://climatejustice.social/tags/paleoclimate" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>paleoclimate</span></a> <a href="https://climatejustice.social/tags/AMOC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AMOC</span></a></p>
anlomedad<p>Rahmstorf's talk at <a href="https://climatejustice.social/tags/EGU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>EGU</span></a> about his life's work, or rather, about one of the topics of his life's work and what others and him contributed to what is known of <a href="https://climatejustice.social/tags/AMOC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AMOC</span></a> today <br><a href="https://youtu.be/HX7wAsdSE60" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/HX7wAsdSE60</span><span class="invisible"></span></a></p><p>At 14:30min or so, he mentions that his Bachelor student just worked out (or maybe repeated the results successfully) what happens at the <a href="https://climatejustice.social/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a>. Why is it colder there, what's the mechanism? <br>So the AMOC slows down and brings less and less warm water into that subarctic gyre South of Greenland. But the cold blob doesn't look cold due to warm water getting released more than compared with the rest of the North <a href="https://climatejustice.social/tags/Atlantic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Atlantic</span></a> . It looks colder because it releases less heat to the atmosphere, precisely bc less warm water manages to enter the gyre. </p><p>And near the American coast, the opposite is observed: more heat is released there, so it looks orange. Also due to AMOC slowdown. * End of his short mentioning of this explanation.</p><p>This next part is my processing the info.</p><p>I had read this also in his recent paper. And stared at it for minutes but didn't get it. It took listening & watching to comprehend what he meant. </p><p>Still unclear: obviously, lotsa warm water is around the gyre, just waiting to be pulled into the roundabout. "I bought the ticket, now let me in!" <br>Why No Entry? Or why very limited entry? <br>Hm. Gotta think some more about it. </p><p>Maybe all that warm water abhores the cold blob. A no-go zone, maybe. </p><p>Or the access is limited bc it's full already... and ... oh, and the queue exists bc South of Iceland, the AMOC is too slow in pushing warm salty water down into the abyss. <br>If it were faster, it would manage to pull in water from within the gyre as well. </p><p>So the gyre and its cold blob isn't really part of what drives AMOC. <br>It just swivels happily around itself? <br>And whether its cold-er than its surrounding waters or of the same salinity and warmth doesn't matter, it'll go round and round anyway.<br>AMOC also doesn't need the gyre. When AMOC is faster, the blob disappears. When it's slower, the blob happens.</p><p>Ah. Due to it being cold-er, it attracts clouds bursting overhead. So it rains there more often than elsewhere bc it's cold-er, and it's cold-er bc there's only limited entry for warm water, depending on how fast the region North of the gyre can push the salty water into the abyss. </p><p>Okay. That might be it. But Rahmstorf's explanations ended at *. The rest is only me, doing a <a href="https://climatejustice.social/tags/Tegtmeier" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Tegtmeier</span></a> , a working theory. Written down so it sticks and can later be compared to newly learned stuff.</p>
anlomedad<p>Germany has a warning for tonight, a storm coming from the South West. I thought, SouthWest is unusual for winter, hence I checked the broader conditions @ <a href="https://climatejustice.social/tags/EarthNullschool" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>EarthNullschool</span></a> <a href="https://earth.nullschool.net/#current/ocean/primary/waves/overlay=significant_wave_height/orthographic=-30.24,41.58,281/loc=-27.995,53.889" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">earth.nullschool.net/#current/</span><span class="invisible">ocean/primary/waves/overlay=significant_wave_height/orthographic=-30.24,41.58,281/loc=-27.995,53.889</span></a> <br>Top left:<br>So there's this <a href="https://climatejustice.social/tags/PolarVortex" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PolarVortex</span></a> <a href="https://climatejustice.social/tags/SSW" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SSW</span></a> split still ongoing, as seen in windspeeds at 10hPa.</p><p>Top right: the normal <a href="https://climatejustice.social/tags/jetstream" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>jetstream</span></a> at 250hPa races from North America straight to Europe because, I reckon, there's the hard border between the Azores High pressure system and the Iceland Low. (not in picture). Where the jet "hits" Spain, it gets driven North East. Dunno why. (And creates that storm in Germany. <a href="https://climatejustice.social/tags/weather" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>weather</span></a> ) </p><p>Bottom left: sea surface temperature anomaly in the <a href="https://climatejustice.social/tags/Atlantic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Atlantic</span></a> with a location in the <a href="https://climatejustice.social/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a> highlighted. It's currently 0.1°C colder than its longterm average. Yay. And for real it's 2.1°C warm there. <a href="https://climatejustice.social/tags/AMOC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AMOC</span></a></p><p>And now the eyeopener🥁 <br>the bottom right pic shows "significant wave height". The cold blob sees 9-10m waves = ocean mixing, bigly. <br>Are waves 1 of the 🌡️ reasons that blob forms where it does?</p>
Eric Maugendre<p>A new study suggests that the Atlantic overturning circulation AMOC “is on tipping course”</p><p>"It’s observational data from the South Atlantic which suggest the AMOC is on tipping course. Not the model simulation, which is just there to get a better understanding of which early warning signals work, and why."</p><p>Stefan Rahmstorf: <a href="https://www.realclimate.org/index.php/archives/2024/02/new-study-suggests-the-atlantic-overturning-circulation-amoc-is-on-tipping-course/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">realclimate.org/index.php/arch</span><span class="invisible">ives/2024/02/new-study-suggests-the-atlantic-overturning-circulation-amoc-is-on-tipping-course/</span></a> <span class="h-card" translate="no"><a href="https://slrpnk.net/c/climate" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>climate</span></a></span> </p><p><a href="https://mas.to/tags/AMOC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AMOC</span></a> <a href="https://mas.to/tags/EWS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>EWS</span></a> <a href="https://mas.to/tags/warningSignals" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>warningSignals</span></a> <a href="https://mas.to/tags/climateChange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>climateChange</span></a> <a href="https://mas.to/tags/dataViz" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>dataViz</span></a> <a href="https://mas.to/tags/maps" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>maps</span></a> <a href="https://mas.to/tags/map" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>map</span></a> <a href="https://mas.to/tags/Scotland" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Scotland</span></a> <a href="https://mas.to/tags/Iceland" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Iceland</span></a> <a href="https://mas.to/tags/Norway" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Norway</span></a> <a href="https://mas.to/tags/Denmark" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Denmark</span></a> <a href="https://mas.to/tags/climate" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>climate</span></a> <a href="https://mas.to/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a> <a href="https://mas.to/tags/NorthSea" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NorthSea</span></a> <a href="https://mas.to/tags/Atlantic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Atlantic</span></a></p>
anlomedad<p><span class="h-card" translate="no"><a href="https://mastodon.online/@rustoleumlove" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>rustoleumlove</span></a></span> <br>And it's everywhere... except for a few locations. Like in the North Atlantic, that <a href="https://climatejustice.social/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a> and as an extension to the blob, off the US coast, where it's cooler than the base line 1979-2000. <br> <br>The daily SST anomaly since January 1st as maps with a slider: <br><a href="https://climatereanalyzer.org/clim/daily_maps/?dm_id=world-wt3&wm_id=sstanom&year=2024" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">climatereanalyzer.org/clim/dai</span><span class="invisible">ly_maps/?dm_id=world-wt3&wm_id=sstanom&year=2024</span></a><br> While January 2023 saw only a hint of the ColdBlob and off the US coast it was much warmer, not cooler like this year <a href="https://climatereanalyzer.org/clim/daily_maps/?dm_id=world-wt3&wm_id=sstanom&year=2023" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">climatereanalyzer.org/clim/dai</span><span class="invisible">ly_maps/?dm_id=world-wt3&wm_id=sstanom&year=2023</span></a><br>:(</p>
anlomedad<p><span class="h-card"><a href="https://fediscience.org/@Ruth_Mottram" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>Ruth_Mottram</span></a></span> <br>Haha, how fascinating!! Awesome pondering by Scott. Has me brooding over the problem now, too! <br>And I find a similarly fascinating measuring problem: rainfall over the <a href="https://mst.mineown.de/tags/ocean" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ocean</span></a> – in particular <a href="https://mst.mineown.de/tags/rain" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>rain</span></a> over the Cold Blob area. How would one solve this? On land, <a href="https://mst.mineown.de/tags/radar" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>radar</span></a> is used for observation nowadays. In <a href="https://mst.mineown.de/tags/Germany" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Germany</span></a> it is. And particularly informs on <a href="https://mst.mineown.de/tags/HeavyRains" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HeavyRains</span></a> far better than a broad-meshed network of point-stations ever can. <br>I wonder whether such special areas of interests like the <a href="https://mst.mineown.de/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a> can be monitored by a network of 5 or 10 radar stations. <br>I find the Cold Blob interesting for this because the drying and heating of East <a href="https://mst.mineown.de/tags/Canada" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Canada</span></a>'s <a href="https://mst.mineown.de/tags/soil" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>soil</span></a> – due to less <a href="https://mst.mineown.de/tags/snow" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>snow</span></a> cover in spring – forces a High over <a href="https://mst.mineown.de/tags/Greenland" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Greenland</span></a> – which in turn creates a Low to its South-East – which about covers half of the <a href="https://mst.mineown.de/tags/SubarcticGyre" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SubarcticGyre</span></a>, ie the Cold Blob. Dunno if true or not, but I translate "Low" with rainfall. So the <a href="https://mst.mineown.de/tags/freshening" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>freshening</span></a> of the Subarctic Gyre could in part be due to drought in East Canada.</p>
anlomedad<p>(dang. Vivaldi just crashed ...lost the toot and ALT texts!)</p><p>I look at these collages not as scientist, which I aint, but to get a more informed feel for the <a href="https://mst.mineown.de/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a> in the North <a href="https://mst.mineown.de/tags/Atlantic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Atlantic</span></a> <a href="https://mst.mineown.de/tags/Ocean" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Ocean</span></a> which shows up in models and in reanalyses. <br>And to get a feel for the actual available measurements, their spread and their possible weirdness. </p><p>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. </p><p>Can you spot weirdness?<br>That's because there IS weirdness in the data, as I'll show later.</p><p>I describe notable non-weird and weird features in the ALT text.</p>
anlomedad<p>I organised the measurements in groups for depths from 0 down to 2000m and latitude and longitude ranges so the <a href="https://mst.mineown.de/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a> is covered in 211 groups (thank god for <a href="https://mst.mineown.de/tags/awk" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>awk</span></a> arrays!). <br>An individual chart then shows 7 columns: ºC in Sept 1975-2022 (where available; the line is "interpolated" for missing data) at eg., <br>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.<br>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-337ºE from left to right (38ºW to 23ºW).<br>Data from 2000 to 2022 is continuous.</p>
anlomedad<p>How to VErY quickly duplicate <a href="https://mst.mineown.de/tags/charts" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>charts</span></a> without having to edit the data ranges manually: <a href="https://mst.mineown.de/tags/Excel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Excel</span></a> CTRL+D duplicates a chart, then simply drag the highlighted column range to the new range <a href="https://yewtu.be/3u4TU1PbhAk" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="">yewtu.be/3u4TU1PbhAk</span><span class="invisible"></span></a></p><p>I usually plot stuff in <a href="https://mst.mineown.de/tags/LibreOffice" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LibreOffice</span></a> <a href="https://mst.mineown.de/tags/Calc" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Calc</span></a> but for this one purpose, I reanimated my ancient <a href="https://mst.mineown.de/tags/MSOffice" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MSOffice</span></a> 2011 for Mac. Very handy feature. </p><p>I'm plotting September temperature averages from actual measurements in the <a href="https://mst.mineown.de/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a> in the North <a href="https://mst.mineown.de/tags/Atlantic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Atlantic</span></a>. Data from the World Ocean Database <a href="https://www.ncei.noaa.gov/access/world-ocean-database-select/dbsearch.html" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">ncei.noaa.gov/access/world-oce</span><span class="invisible">an-database-select/dbsearch.html</span></a><br>(XBT bias correction applied: Cheng 2014)</p>
anlomedad<p>I needed to know where the <a href="https://mst.mineown.de/tags/Tolkien" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Tolkien</span></a> <a href="https://mst.mineown.de/tags/LotR" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LotR</span></a> names come from in above article about the sudden warming and sudden halt to that warming in the <a href="https://mst.mineown.de/tags/PETM" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PETM</span></a>. <br>Turns out it's a whole cluster of <a href="https://mst.mineown.de/tags/MiddleEarth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MiddleEarth</span></a> names on or near the Rockall Plateau. And some belong officially to <a href="https://mst.mineown.de/tags/Ireland" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Ireland</span></a> as their Marine department states in their article on "The real map of Ireland": <a href="https://www.marine.ie/site-area/irelands-marine-resource/real-map-ireland-0" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">marine.ie/site-area/irelands-m</span><span class="invisible">arine-resource/real-map-ireland-0</span></a></p><p>But not all. <br>Here are all worldwide officially approved seafloor features named after Tolkien's Middle earth:</p><p>Edoras Bank, -22.166667, 56<br>Eriador Seamount, -25.333333, 54.833333<br>Fangorn Bank, -20.166667, 55.5<br>Gondor Seamount, -23.833333, 54.25<br>Lórien Knoll, -19.83333, 54.16667<br>Rockall Plateau, -18.83333, 56.33333<br>Rohan Seamount, -22.333333, 54.75<br>Isengard Ridge, -21, 52.416667</p><p>This last one is East of Argentina: <br>Hornburg Hill, -50.3508, -41.93471</p><p>Found them all here in the official global catalogue of named seafloor features: <a href="https://www.ngdc.noaa.gov/gazetteer/" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="">ngdc.noaa.gov/gazetteer/</span><span class="invisible"></span></a> 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 <a href="https://mst.mineown.de/tags/AWK" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AWK</span></a> for $0 ~/Tolkien/ and Bob's my uncle. </p><p>This long and interesting blogpost covers the Rockall / Gondor / Eriador area in more detail <a href="https://www.volcanocafe.org/rockall-the-lost-continent-of-middle-earth/" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">volcanocafe.org/rockall-the-lo</span><span class="invisible">st-continent-of-middle-earth/</span></a> wrt <a href="https://mst.mineown.de/tags/geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>geology</span></a> and history. <br>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? <br>But in any case, paired with the article in #1, a read well worth my time. <br>I even took away something for my quest wrt <a href="https://mst.mineown.de/tags/AMOC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AMOC</span></a> slowdown because the area is in the region of the <a href="https://mst.mineown.de/tags/ColdBlob" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColdBlob</span></a></p>
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