GG - Antarctica and the Global Commons Flashcards
What is a global commons?
The Earth’s shared resources which aren’t owned by one country or organisation - belong to everybody and should be available for everybody’s use and benefit
What are the 4 global commons?
- Deep oceans and high seas
- Atmosphere
- Outer Space
- Antarctica
Why do environmental NGOs want to protect the global commons?
Want to protect them from exploitation as they have unique wildlife habitats and have a positive impact on environmental global systems. Are also very valuable for scientific research
What is the ‘tragedy of the commons’?
When countries and organisations feel that they can exploit the global commons as the consequences for exploitation are shared by everybody
Why is the demand for resources increasing?
Industrialisation
Development
Increased waste production
How are pressures on the global commons increasing?
‘Tragedy of the commons’
Increased demand for resources
High vulnerability of the global commons due to increased accessibility
How are the global commons protected?
NGOs such as the WWF (World Wide Fund for Nature)
Global cooperation to create sustainable development
The UN
Give the physical geography of Antarctica
Most southern continent containing the geographic South Pole
5th largest continent in the world
The largest desert (cold desert)
No native / indigenous population
Contains 90% of all ice on Earth and 70% of all of fresh water on Earth
What area of Antarctica is considered to be the global commons?
The whole of the continent of Antarctica as well as the Southern Ocean as far north as the Antarctic Convergence
What is the climate of Antarctica like?
Average temperature of -49°C
Only small amounts of rainfall —> inland around 166mm (desert) and at the coast 200mm per year
Strong winds (can exceed 30m/s) due to central plateau
What is the wildlife like in Antarctica?
Due to low temperatures, little rainfall and limited sunshine lichens and mosses dominate the land area
Only two types of flowering plant can grow
Environmental recovery is slow due to cold temperatures reducing the rate of decomposition and growth so the terrestrial environment is very fragile - decades for a footprint in moss to remain
Surrounding sea supports a rich variety of marine birds
What is the Antarctic Convergence?
The point at which cold Antarctica waters meets the warmer sea water to the north - boundary that loops all around the Antarctic continent
Explain why there is a productive marine environment in Antarctica
At the Antarctic Convergence warmer saline waters meet colder, denser and less saline waters moving north from Antarctica
When the conflict currents meet and converge nutrient rich water up wells to create a productive marine environment for plants and animals such as krill
What are the four main threats to Antarctica?
Climate change
Fishing and whaling
Search for minerals
Tourism and research
Describe how climate change is a threat to Antarctica
Antarctic Peninsula is one of the most rapidly warming places in the world increasing by 3°C in the last 50 years
Variation in ice sheets as high loss in the Antarctic peninsula and West Antarctic Ice Sheet but East Antarctica’s ice sheet is thickening
Melting sea ice has caused rise of 3mm a year —> caused krill population to decline by 80% (basis of many food webs)