Volume No. 5 Issue No.: 1 Page No.: 240-251 July-September 2010

 

BIOTIC AND ABIOTIC PROCESSES AS A CARBON SEQUESTRATION STRATEGY

 

J. B. Kambale* and V. K. Tripathi

Division of Agricultural Engineering, IARI, New Delhi

 

Received on : October 11, 2009

 

ABSTRACT

 

Globally major concern is increasing concentration of greenhouse gases in the atmosphere as its dominating impact on climate change. Globally 49 GtCO2-eq. per year emission is occurring, in which carbon dioxide is the major contributor. In India, total amount of GHGs emitted is 2.0 billion tonnes per annum, which account for only 4 per cent of the total global emissions. Majority of CO2 emission is due to fuel combustion in the energy and industrial processes like cement and steel production and road transport. Disposing of the carbon dioxide (CO2) into long-lived pools (terrestrial biosphere, underground, or ocean) and storing it securely so it is not immediately reemitted is referred as carbon sequestration. Biotic C sequestration involves capture of atmospheric C through photosynthesis and storage in biota, soil and wetlands. Land use, vegetation and soil management have a strong impact on the biotic processes of C sequestration. In geological formations, sequestration of CO2 is possible in oil and coal gas reservoirs for storage and enhancing the recovery but maximum possibility of storage is in deep saline aquifers. Ocean is the largest potential sink for CO2, ocean fertilization and deeper injections is more efficient than shallower ones. Mineral sequestration is the safest way of carbon sequestration with the limitation that process is very slow and takes thousands of years. Understanding the C sequestration process in view of cost would help in better agricultural land use and management practices.

 

Keywords : Climate change, Greenhouse gases, Carbon sequestration, Biotic process, Ocean sequestration

 

 

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