Geo engineering
description
Transcript of Geo engineering
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Geo engineering
Presented by :
• Soumyabhusan Sasmal
• Shweta Bhanushali
• Sahil Shah
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What is geoengineering ???• Geoengineering is the application of geosciences
• An intentional large-scale manipulation of the environment.
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origination• Its was first proposed by “James Pollard Espy” the first meteorologist in 1830’s to control forest burning in order to stimulate rain.
• Came in to practice during the cold war
• In 1965 it was specifically mentioned as an option to mitigate the effects of climate change
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• In 1991 A real world experiment played out with the volcanic eruption of Mount Pinatubo in the Philippines.
• John Holdren, has personally come out in support of research into geoengineering options.
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Need of geoengineering• concentration of carbon dioxide in the earth’s atmosphere recently surpassed 400 parts per million.
• Relentlessly rising greenhouse-gas emissions.
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Geoengineering Schemes
Climate engineering
• Solar Radiation Management
• Carbondioxide Removal
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What Is Carbon Sequestration ?
• Also known as “carbon capture”• A geoengineering technique for the long-term
storage of carbon dioxide (or other forms of carbon) for the mitigation of global warming
• Ways that carbon can be stored (sequestered):• In plants and soil “terrestrial sequestration” (“carbon sinks”)• Underground “geological sequestration” • Deep in ocean “ocean sequestration”• As a solid material (still in development)
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Terrestrial Carbon Sequestration
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Terrestrial Carbon Sequestration• The process through which CO2 from the atmosphere is
absorbed naturally through photosynthesis & stored as carbon in biomass & soils.
• Tropical deforestation is responsible for 20% of world’s annual CO2 emissions.
• Ways to reduce greenhouse gases:• avoiding emissions by maintaining existing carbon storage in trees and soils• increasing carbon storage by tree planting
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Geological Sequestration
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Geological Sequestration• Storing of CO2 underground in rock formations able to retain large amounts of CO2 over a long time period• Held in small pore spaces (have held oil and nat. gas for millions of years)
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Ocean Sequestration
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The Ocean and the “Biological Pump”
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• This geo-engineering approach may be considered an analogue to Natural droplet creation at ocean surface
Cloud Seeding
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Solar Radiation ManagementThe other solar radiation management techniques include:• Painting rooftops white• Space mirrors
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PROCESS OF DISPERSING CIRRUS CLOUDS
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Plan: Spraying of Bismuth tri-iodide and silver iodide high in atmosphere
Advantages:1.Availibility of bismuth salts.2. Feasible3.No reduction in rainfall.
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Disadvantages:-
1. Unclear to cool poles
2. Climate alteration3. Cause soil pollution4.Bismuth causes various disorders.
5.Cause of agryria.
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OCEAN FERTILISATION
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Plan:-Boost the growth of plankton by adding nutrients
Advantages:-1. Feeds the algae which absorbs CO2 and other toxic gases2. Iron locks toxic gases3. Benefit marine food chain4. Enhance marine productivity
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Disadvantages:-
1.Unwanted plankton growth2. Non practicable techniques3. Algae which give rise to red
tides and toxic acids.4. Oxygen deterioration.
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Conclusion