Flashcards in Climate Change Deck (11)
What does GWP stand for?
Global Warming potential
What do GWP take into account?
Spectrum of absorption, residence time of different GHG, the potential is expressed as C02 equivalent.
What is the economic sector with the highest GHG emissions?
Electricity/heat production 25%
What country is responsible for the highest GHG emissions?
How can we tell what GHG quantities were present in the past?
Ice cores- - thickness of layers – air bubbles – isotope concentrations – gas conc – precipitation – temp etc
Tree rings – tree grows less
Sediments – amount and types of organic debris
Give examples of observed changes due to global warming?
Extreme events occur more often, desertification, deforestation, soil degradation and formation of deserts.
What problems exists with global warming and the polar regions?
Melting ice causing decreased albedo and rise of sea water.
What problems exist with global warming and tundra?
Thawing of permafrost soils, starting microbial activity and increasing GHG emissions.
Why does climate changes threaten water security?
The Gulf Stream system might break down due to the mixing of water temperatures.
What is mitigation?
Human intervention to reduce sources of GHG and enhance the sinks of GHG.