A new research paper found that since the end of the last ice age (about 12,000 years ago), the gas hydrate system in the deep Black Sea called the Danube fan has not adapted to warmer conditions.
In a recently published study, researchers believe that they have discovered “Very dynamic situation” on “The development of the Black Sea since the last ice age.” Their analysis of the depositional state of natural gas hydrates (methane trapped in water molecules that are physically like ice) is a delayed response to climate phenomena.
Investigators using coring technology, geophysical logging and on-site temperature measurement said that data from the drilling site in the Romania section of the Black Sea showed that the free methane content under the seafloor did not match the content in other locations.
“This shows that the gas hydrate system in the Danube deep sea fan is still responding to the climate change triggered by the end of the last glacier maximum period. [the Ice Age],”
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The important part of their research is related to “Natural Gas Hydrate Stability Zone” – The lowest point of natural gas hydrate formation due to temperature and pressure. “From our point of view, the stability boundary of natural gas hydrate is close to the warmer conditions in the ground, but the free methane gas that has always existed at this lower edge has not risen with it,” Said Michael Riedel, one of the co-authors of the study.
Since the last ice age, the Black Sea environment itself has undergone tremendous changes. The sea level is 100m higher, the salt water from the Mediterranean has been able to reproduce the body like a lake before, and global warming has increased the temperature of the bottom water.
The study highlights the complex responses and time scales of climate change to the marine environment, and provides more data on the expected consequences of modern climate change.
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