A CURATED COLLECTION OF SCIENCE FACTS AND DELICIOUS FICTIONS !
Showing posts with label ocean currents. Show all posts
Showing posts with label ocean currents. Show all posts

3/18/26

PANAMA : OCEAN WATERS DID NOT RISE SEASONALLY FOR THE FIRST TIME IN 40 YEARS : TERRIBLE CONCERN THAT OCEAN SYSTEM IS COLLAPSING

NEWSROOM PANAMA : FOR THE FIRST TIME IN 40 YEARS

Excerpt: For over 40 years, seasonal upwelling in the Gulf of Panama has followed a consistent pattern. Between the end of the calendar year and early spring, trade winds from the north push surface waters offshore, drawing cooler, deeper water upward. The process delivers nutrients that stimulate phytoplankton growth, forming the foundation of the marine food web. .................

In early 2025, that system failed. No cold water rose to the surface. No spike in surface chlorophyll was recorded. Ocean surface temperatures remained elevated through the season. According to data collected by scientists aboard the S/Y Eugen Seibold, a research vessel jointly operated by the Smithsonian Tropical Research Institute and the Max Planck Institute, the vertical movement of water that characterizes the upwelling was entirely absent. The study documenting the event, published in Proceedings of the National Academy of Sciences, confirms it as the first complete suppression of the upwelling in the observational record. Researchers noted that this shift eliminated a key stabilizing mechanism in the region’s marine ecosystem and exposed vulnerabilities in the broader ocean-climate system.

Winds Weaken, With Cascading Effects

At the center of the disruption was a collapse in atmospheric drivers. The northern trade winds, normally responsible for triggering the upwelling process, were significantly weaker in early 2025. As a result, surface waters remained in place, and the temperature differential needed to initiate vertical mixing did not materialize. The absence of cooler waters had immediate ecological effects. Without an influx of nutrients, phytoplankton production declined sharply. Satellite observations confirmed reduced chlorophyll-a concentrations throughout the Gulf of Panama during the period when biological productivity typically peaks.

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Go to this important article which is excellent to learn about how this is supposed to work, and the effect on the sea creatures - including starvation!

2/20/26

CLAM ANALYSIS SHOWS NORTH ATLANTIC SUBPOLAR GYRE ACTING STRANGELY

LIVE SCIENCE : MASSIVE SYSTEM OF ROTATING OCEAN CURRENTS ACTING STRANGELY

Excerpt: An analysis of clam shells suggests the North Atlantic subpolar gyre has had two periods of destabilization over the past 150 years: one around 1920 and the other from 1950 through present. ....

"It's highly worrying," study lead author Beatriz Arellano Nava, a postdoctoral research fellow in physical geography at the University of Exeter in the U.K., told Live Science. "The subpolar gyre was recently acknowledged as a tipping element. We still need to understand more of the impacts of a subpolar gyre abrupt weakening. But what we know so far with the few studies that have been published is that it would bring more extreme weather events, particularly in Europe ... and also changes in global precipitation patterns."

.... But the other signal was a total surprise, she said. The clam data revealed that the subpolar gyre was unstable for a few years in the run-up to the 1920s North Atlantic regime shift. This previously described event was characterized by the strengthening of currents in the gyre. Instability in the subpolar gyre likely caused the 1920s regime shift, and the timeline suggests the period of instability may have reflected the subpolar gyre's recovery from its Little Ice Age collapse, Arellano Nava said.



Go to the article for more upsetting details and a globe showing the way currents work!

3/31/24

ATLANTIC OCEAN COLLAPSE? WHY IT'S SO IMPORTANT

NPR : WHEN THE ATLANTIC OCEAN CURRENT COLLAPSE  by Lauren Sommer

Excerpt: Deep in the Atlantic Ocean, there's a massive current the size of 8,000 Mississippi Rivers. Its role in the Earth's climate is so powerful that it determines weather from the equator to Europe, crop production in Africa and sea level rise on the East Coast.

7/3/23

WHAT IS A RIPTIDE and HOW IS IT DIFFERENT FROM UNDERTOW? 6000 WAVES A DAY BREAKON A BEACH....

SURFER TODAY 

You go to the beach and you see warning signs about the conditions... Have you been sucked under?

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 This article explains the three types of dangerous tides or tows that can drag you out or under...

Excerpt:  Every day, some 6.000 waves break on a given beach.

The broken wave pushes water up the beach, and gravity pulls the water back down the beach as a backwash.

When big waves break on the beach, a large uprush and backwash of water and sand are generated: this seaward-flowing water/sand mixture is pulled strongly into the next breaking wave...


3/15/14

UPPER LAYERS OF OCEAN GETTING LESS SALTY! CLIMATE CHANGE PAPER!

NATURE WORLD NEWS - CLIMATE CHANGE - TRAPPED HEAT OCEAN  full article link.


Part of the article:

"For the study, researchers worked with their colleagues at University of Pennsylvania to analyze data from the past 60 years.

They found that the ocean surface has been getting less salty in the past few decades, which has prevented the water underneath from mixing with the top layer. Thus, the heat trapped in deep oceanic water hasn't had an escape route in several years.  

"Deep ocean waters only mix directly to the surface in a few small regions of the global ocean, so this has effectively shut one of the main conduits for deep ocean heat to escape," says Casimir de Lavergne, at McGill University and lead author of the paper."