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Post by nautonnier on Aug 9, 2020 9:26:55 GMT
"Florida current is weaker now than at any point in the past century
by Woods Hole Oceanographic Institution
A key component of the Gulf Stream has markedly slowed over the past century—that's the conclusion of a new research paper in Nature Communications published on August 7. The study develops a method of tracking the strength of near-shore ocean currents using measurements made at the coast, offering the potential to reduce one of the biggest uncertainties related to observations of climate change over the past century.
"In the ocean, almost everything is connected," said Christopher Piecuch, an assistant scientist in the Physical Oceanography Department at the Woods Hole Oceanographic Institution (WHOI) and author of the study. "We can use those connections to look at things in the past or far from shore, giving us a more complete view of the ocean and how it changes across space and time." "More here> phys.org/news/2020-08-florida-current-weaker-century.html I see their problem ... and I fixed it, One of the biggest uncertainties in climate models is the behavior of ocean currents modelers. Especially the behavior of proxy modelers |
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Post by acidohm on Aug 9, 2020 9:28:19 GMT
I see their problem ... and I fixed it, One of the biggest uncertainties in climate models is the behavior of ocean currents modelers. Especially the behavior of poxy modelers |
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Post by douglavers on Aug 12, 2020 13:06:53 GMT
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Post by sigurdur on Aug 14, 2020 2:58:25 GMT
Gaining mass.
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Post by acidohm on Sept 27, 2020 6:06:33 GMT
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Post by nautonnier on Sept 27, 2020 12:27:33 GMT
That is an amazing drop that doesn't augur well for NW Europe in a month or so. Is there any subsurface temperature drop? |
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Post by acidohm on Sept 27, 2020 12:36:59 GMT
That is an amazing drop that doesn't augur well for NW Europe in a month or so. Is there any subsurface temperature drop? Don't know....could do with an Atlantic SubS map like the ENSO one really. |
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Post by acidohm on Sept 27, 2020 13:28:50 GMT
That is an amazing drop that doesn't augur well for NW Europe in a month or so. Is there any subsurface temperature drop? So I found this....lots of info of oceans generally, I screenshot the most relevant bit. |
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Post by acidohm on Sept 27, 2020 13:45:15 GMT
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Post by missouriboy on Sept 27, 2020 19:50:31 GMT
And this chart gives you a real feel for the cumulative effects of SC24 (assumption) on the high latitude (business) end (northern branch) of the Gulf Stream. We were looking at this back in 2015-16, and it got marginally better, but a renewed step downward in 2020. Cumulative effect downward across SC24. Can't be good for the "hot tub" effects west of the Isles. If those meridianal African waves move or shut down ... plenty of room in Oklahoma eh Walnut?  |
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Post by missouriboy on Nov 25, 2020 15:52:09 GMT
And another hypothesis on the reveral of circulation in the Beaufort gyre and a dramatic cooling in the N Atlantic due to a shutdown or dramatic displacement of the NAD. This one makes enough sense that it should really be followed closely. electroverse.net/the-arctics-ticking-climate-bomb-little-ice-age-imminent/During the second half of the 20th century the gyre adhered to a cyclical pattern in which it would shift gears every five to seven years and temporarily spin in a counter-clockwise direction, expelling ice and freshwater into the eastern Arctic Ocean and the North Atlantic. But for more than 17 years now, this carousel of ice and freshwater has been spinning faster in its usual clockwise direction, all the while collecting more and more freshwater from three sources: melting sea ice, runoff flowing into the Arctic Ocean from Russian and North American rivers, and the relatively fresh water streaming in from the Bering Sea.
As reported by e360.yale.edu: Today, the Beaufort Gyre now holds as much freshwater as all of the Great Lakes combined, and its continuing clockwise swirl is preventing this enormous volume of ice and cold-freshwater from flushing into the North Atlantic Ocean. Scientists say the gyre will inevitably weaken and reverse direction, and when it does it could expel a massive amount of icy fresh water into the North Atlantic.
Polar oceanographer Andrey Proshutinsky of the Woods Hole Oceanographic Institution has labeled this anticipated surge of water a “ticking climate bomb,” noting that even a partial flush of that growing reservoir –a mere 5 percent– could temporarily cool the climate of Iceland and northern Europe. A larger outflow would actually threaten to shutdown the Gulf Stream, an event that would see ice age conditions sweep Northern and Western Europe almost overnight.
We know this occurs, and have detailed records of a relatively recent event: during the 1960s and 1970s, a surge of fresh Arctic water was released that cooled the top half-mile of parts of the North Atlantic. Known as the Great Salinity Anomaly, British oceanographer Robert R. thingyson said the event represented one of the most persistent and extreme variations in global ocean climate observed during the past century. The surge of ice and freshwater cooled Northern Europe dramatically and disrupted the North Atlantic food chain. Between 1951 and 2010, many of Europe’s exceptionally cold winters occurred during the period of the Great Salinity Anomaly.
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Post by nautonnier on Nov 25, 2020 18:08:38 GMT
And another hypothesis on the reveral of circulation in the Beaufort gyre and a dramatic cooling in the N Atlantic due to a shutdown or dramatic displacement of the NAD. This one makes enough sense that it should really be followed closely. electroverse.net/the-arctics-ticking-climate-bomb-little-ice-age-imminent/During the second half of the 20th century the gyre adhered to a cyclical pattern in which it would shift gears every five to seven years and temporarily spin in a counter-clockwise direction, expelling ice and freshwater into the eastern Arctic Ocean and the North Atlantic. But for more than 17 years now, this carousel of ice and freshwater has been spinning faster in its usual clockwise direction, all the while collecting more and more freshwater from three sources: melting sea ice, runoff flowing into the Arctic Ocean from Russian and North American rivers, and the relatively fresh water streaming in from the Bering Sea.
As reported by e360.yale.edu: Today, the Beaufort Gyre now holds as much freshwater as all of the Great Lakes combined, and its continuing clockwise swirl is preventing this enormous volume of ice and cold-freshwater from flushing into the North Atlantic Ocean. Scientists say the gyre will inevitably weaken and reverse direction, and when it does it could expel a massive amount of icy fresh water into the North Atlantic.
Polar oceanographer Andrey Proshutinsky of the Woods Hole Oceanographic Institution has labeled this anticipated surge of water a “ticking climate bomb,” noting that even a partial flush of that growing reservoir –a mere 5 percent– could temporarily cool the climate of Iceland and northern Europe. A larger outflow would actually threaten to shutdown the Gulf Stream, an event that would see ice age conditions sweep Northern and Western Europe almost overnight.
We know this occurs, and have detailed records of a relatively recent event: during the 1960s and 1970s, a surge of fresh Arctic water was released that cooled the top half-mile of parts of the North Atlantic. Known as the Great Salinity Anomaly, British oceanographer Robert R. thingyson said the event represented one of the most persistent and extreme variations in global ocean climate observed during the past century. The surge of ice and freshwater cooled Northern Europe dramatically and disrupted the North Atlantic food chain. Between 1951 and 2010, many of Europe’s exceptionally cold winters occurred during the period of the Great Salinity Anomaly.
I wonder if that was the reason for the 'ice age scare' in the early 70's? |
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Post by missouriboy on Nov 25, 2020 21:40:53 GMT
That and JD. The N Atlantic north of 45 N is also looking cold. All of the UK is north of 45 N.  |
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Post by glennkoks on Nov 26, 2020 14:37:03 GMT
Interesting the "Great Salinity Anomaly" from 1968-1982 clearly had an impact on the colder winters we experienced during the 1970's. Also interesting that the data set used by the NSIDC starts in 1981. Literally the ending of this anomaly and as we shifted into a milder cycle. It should would be interesting to see what a graph of arctic sea ice would look like if we had satellite data going back to say 1950?
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Post by walnut on Nov 26, 2020 15:51:13 GMT
And this chart gives you a real feel for the cumulative effects of SC24 (assumption) on the high latitude (business) end (northern branch) of the Gulf Stream. We were looking at this back in 2015-16, and it got marginally better, but a renewed step downward in 2020. Cumulative effect downward across SC24. Can't be good for the "hot tub" effects west of the Isles. If those meridianal African waves move or shut down ... plenty of room in Oklahoma eh Walnut? Sorry Moboy missed this, yes there is good land to be had in Oklahoma, and enough rain. Sam Houston was not fair in his assessment. |
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