"Overall, there is almost no ice over four years old remaining—it now comprises just 3 percent of the total ice cover. This is the same percentage as last year and contrasts starkly with the late 1980s when 30 to 35 percent of the Arctic Ocean’s ice was older than 4 years."
New cataclysmic consequences of vanishing pole #ice?
(1)
Sometimes I wonder whether scientists are telling us the whole truth.
Whereas in the late 1980s, 30-35% of the #ArticOcean was never ice-free, now at a mere 3%, it has been all but exterminated.
Since at least the early 1990s, there has been talk about the results that the slowing and eventual likely breakdown of the #NorthAtlanticConveyorBelt, part of the the #GlobalConveyorBelt.
...there was talk of a "small #IceAge for Northern #Europe, , in particular for the #BritishIsles, which are much warmer due to the #NorthAtlanticCurrent being pushed north by the sinking heavier salt-water in the #AntarcticFront. This can make sense, comparing cities on the same latitude in #Europe and #NorthAmerica: the continental #climate in #Winnipeg is much more extreme, in particular in winter, than in #London (see pic. below)...
...Then, the forecast was for two decades of rapid #GlobalWarming, which we have been experiencing.
Now, with regard to the latest data the #Antarctica in the south, it shows that the so-called #DeepWaterFormation is not so much "down the drain" anymore, as the oceans and humanity would need it to be:
"The #OceanCirculation, which includes well-known surface and subsurface #currents and the vertical motion of ocean water, appears to have changed in a major way..."
"... over the #SouthernHemisphere in recent decades. Increased contributions of meltwater from the #Antarctic#IceSheet, mostly from melting at depth due to increased warm deep water reaching the edge of the continent, has added #freshwater to the sea currents, making the water less dense. This lighter water flows up to the surface, increasing the stratification in the near-surface layer.
be classified and 80% of the #oceans remain unexplored.
I rarely use all caps, but WHAT HAPPENS IF WE TURN OF THE OXYGEN FOR ABOUT 90% OF THE SPECIES THAT LIVE IN THE OCEAN?!?
Will they largely become extinct?
Will they migrate to the higher water levels?
Will evolutions be accelerated thereby, as these species are accustomed to enormous under-water pressure and might explode by rising?
Will the fish we depend upon for our sustenance in the...
As a reminder for the none-biologists among us:
"Plankton are the diverse collection of organisms found in water (or air) that are unable to propel themselves against a current (or wind).
In the ocean, they provide a crucial source of food to many..."
#MarinePlankton include bacteria, archaea, algae, protozoa and drifting or floating animals that inhabit the #saltwater of #oceans and the brackish waters of estuaries."
(Wikipedia)
How many #DeepSea species in the deep ocean will survive will probably depend on how many really need #oxygen to survive.
...involved in the research into the #ClimateCrisis, as a tipping point could be reached quite soon because things are getting worse:
"The model projects the overturning circulation around #Antarctica will slow by more than 40% over the next three decades, driven almost entirely by pulses of #meltwater
Over the same period, our modelling also predicts a 20% weakening of the famous #NorthAtlantic overturning circulation which keeps #Europe’s...
Perhaps this discussion will illuminate additional risks.
(Particularly: stratification will enable the growth of anoxic bacteria, which will produce poisonous hydrogen sulfide gas. A Canfield ocean. not something possible in the near-term, except, apparently, locally.)
Thank you very much for sharing this interesting aspect.
I shall read it later on.
Is this similar to the #phototrophs of the #Archean Eon (07:16 min, see link below) 3.6-2.5 bn yrs ago, which invented #photosynthesis, using hydrogen and dissolving sulphite to create sulphur and suphuric acid?
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