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Home Geography

Young Blue Hole (YBH)

July 31, 2020
in Environment, Geography
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Recently the Carbon more than 8,000 years old has been found inside the world’s deepest blue hole — the Yongle Blue Hole (YBH)

What are Blue holes?

  • They are marine caverns filled with water and are formed following dissolution of carbonate rocks, usually under the influence of global sea level rise or fall.
  • They are generally circular, steep-walled and open to the surface.

About Young Blue Hole

  • It has a depth of 300 metres, far deeper than the previously recorded deepest blue hole, Dean’s Blue Hole in Bahamas, which had a depth of 202 metres.
  • The difference between Blue holes caverns and other aquatic caverns is that they are isolated from the ocean and don’t receive fresh rainwater.
  • YBH is influenced with some oceanic exchange in the surface water.
  • However, like most blue holes, it is anoxic e. depleted of dissolved oxygen below a certain depth. This anaerobic environment is unfavorable for most sea life.

What researchers have found in YBH?

  • The researchers found low levels of dissolved organic carbon and high levels of dissolved inorganic carbon in YBH, both with radiocarbon ages of more than 6,000 years.
  • Such concentrations of carbon, usually found in deep marine holes like YBH, provide a natural laboratory to study carbon cycling and potential mechanisms controlling it in the marine ecosystem.

Location of the Blue hole

  • Yongle Blue Hole (YBH) was recently discovered in the South China Sea

 

 

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Tags: Prelims

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