GS Environment

Which of the following statements are correct about the deposits of methane hydrate?

  1. Global warming might trigger the release of methane gas from these deposits.
  2. Large deposits of 'methane hydrate' are found in Arctic Tundra and under the seafloor.
  3. Methane in atmosphere oxidizes to carbon dioxide after a decade or two.

Select the correct answer using the code given below.

  1. 1 and 2 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3

Answer

Methane hydrates can only form under very specific physical, chemical and geological conditions. High water pressures and low temperatures provide the best conditions. Methane Hydrate deposits may be several hundred meters thick and generally occur in two types of settings: under Arctic permafrost, and beneath the ocean floor.

Global Warming led to the increase in the temperature which consequently destabilize the methane hydrates and thus release of methane. Methane is relatively short-lived in the atmosphere; a molecule of methane is oxidized to water and carbon dioxide within a decade or so, mainly by reaction with another trace gas, the hydroxyl radical OH-.

The correct option is D.