Regarding the quote in #2 above,
* closure of the Central American Seaway (CAS), [ie Panama]
When did the Panama Isthmus close and lay the table for a fullblown Gulfstream contributing to AMOC heat transport?
https://www.science.org/doi/full/10.1126/sciadv.1600883
They say "we caution against the uncritical acceptance of an isthmus before the Pliocene."
The Pliocene was from 5.3 to 2.58Ma (million years ago).
according to the paper, before 2.8Ma, the Pacific & Caribbean Sea were still connected.
The connected ocean basins also meant that the hot water/air mass from the West Pacific Warm Pool ended up near Iceland whenever the wind blew in El Nino direction?
This might partly explain how Europe's Northern North Atlantic could be 16°C warmer than today in the mid Miocene, 16Ma.
The open seaway apparently also meant that a major driver of the Gulfstream didn't even exist. Before the Isthmus closed, the so-called Loop Current into the Gulf of Mexico was absent. This Loop Current transports hot water from the Caribbean into the Gulf via the Yucatan Channel.
https://www.sciencedirect.com/science/article/pii/S002532272200247X
No idea where that water went before the closure. Probably flowed Northwest because the wind and inflowing Pacific water pushed it and AMOC dragged it, or something.
anlomedad
npub1l5…hqwsw
2026-10-14 15:41:09 UTC
in reply to nevent1q…6cud
Author Public Key
npub1l5jvx9pac7nkef83x85eagftsr82flnqpltdpn43hrlpma7fj0hsvhqwswSeen on
wss://relay.momostr.pinkPublished at
2026-10-14 15:41:09 UTCEvent JSON
{
"id": "5e01850d5356e6b89c58fe1f8caba45ac39b596551be6d0a3f5b453417d882fc",
"pubkey": "fd24c3143dc7a76ca4f131e99ea12b80cea4fe600fd6d0ceb1b8fe1df7c993ef",
"created_at": 1791992469,
"kind": 1,
"tags": [
[
"p",
"fd24c3143dc7a76ca4f131e99ea12b80cea4fe600fd6d0ceb1b8fe1df7c993ef"
],
[
"proxy",
"https://fedifreu.de/@anlomedad/117440018485016925",
"web"
],
[
"e",
"c54c3cfdfe19887348a7904a95bfa3ade098215e73ebe238eae28daf7d78e784",
"",
"root",
"fd24c3143dc7a76ca4f131e99ea12b80cea4fe600fd6d0ceb1b8fe1df7c993ef"
],
[
"e",
"37e38995e75f7b4c5542f8760a82489662778634ffc6374e43a6154c7f88a7bf",
"",
"reply",
"fd24c3143dc7a76ca4f131e99ea12b80cea4fe600fd6d0ceb1b8fe1df7c993ef"
],
[
"proxy",
"https://fedifreu.de/users/anlomedad/statuses/117440018485016925",
"activitypub"
],
[
"L",
"pink.momostr"
],
[
"l",
"pink.momostr.activitypub:https://fedifreu.de/users/anlomedad/statuses/117440018485016925",
"pink.momostr"
],
[
"-"
]
],
"content": "Regarding the quote in #2 above,\n* closure of the Central American Seaway (CAS), [ie Panama]\n\nWhen did the Panama Isthmus close and lay the table for a fullblown Gulfstream contributing to AMOC heat transport?\nhttps://www.science.org/doi/full/10.1126/sciadv.1600883\nThey say \"we caution against the uncritical acceptance of an isthmus before the Pliocene.\" \nThe Pliocene was from 5.3 to 2.58Ma (million years ago).\n\naccording to the paper, before 2.8Ma, the Pacific \u0026 Caribbean Sea were still connected. \n\nThe connected ocean basins also meant that the hot water/air mass from the West Pacific Warm Pool ended up near Iceland whenever the wind blew in El Nino direction?\nThis might partly explain how Europe's Northern North Atlantic could be 16°C warmer than today in the mid Miocene, 16Ma.\n\nThe open seaway apparently also meant that a major driver of the Gulfstream didn't even exist. Before the Isthmus closed, the so-called Loop Current into the Gulf of Mexico was absent. This Loop Current transports hot water from the Caribbean into the Gulf via the Yucatan Channel.\nhttps://www.sciencedirect.com/science/article/pii/S002532272200247X\n\nNo idea where that water went before the closure. Probably flowed Northwest because the wind and inflowing Pacific water pushed it and AMOC dragged it, or something.",
"sig": "af4cfa2c8adfcae283f57003c5875e8deef572066e63604b61ffbba694a43231a27f57fcb945a9d2ac6d674045017f018622b4926e1672eb7ff2b1c17112508a"
}