Impacts of Climate Change – The Arctic WORLD AT RISK.

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Presentation transcript:

Impacts of Climate Change – The Arctic WORLD AT RISK

The disappearing arctic By how much did permanent sea ice decrease by between 2004 and 2005 according to NASA studies?By how much did permanent sea ice decrease by between 2004 and 2005 according to NASA studies?

The disappearing arctic By how much did permanent sea ice decrease by between 2004 and 2005 according to NASA studies?By how much did permanent sea ice decrease by between 2004 and 2005 according to NASA studies? 14% which is equivalent to a size 3x that of the UK

The disappearing Arctic

Why is this such a problem? Apart from rising sea levels why is it a problem if we lose sea ice such as the arctic?Apart from rising sea levels why is it a problem if we lose sea ice such as the arctic?

Which would you pick on a hot day?

albedo Albedo is the amount of solar radiation reflected by the Earth’s surfaces.Albedo is the amount of solar radiation reflected by the Earth’s surfaces.

Albedo 1. Light coloured snow and ice reflects back the Sun’s energy efficiently.1. Light coloured snow and ice reflects back the Sun’s energy efficiently. 2. Exposed land is darker coloured and absorbs more energy. THIS IS THE SAME FOR OPEN OCEAN.2. Exposed land is darker coloured and absorbs more energy. THIS IS THE SAME FOR OPEN OCEAN.

Albedo 3. As the ice melts, more land is exposed. This absorbs more heat, melting more ice.3. As the ice melts, more land is exposed. This absorbs more heat, melting more ice. 4. The altitude of the melting ice is now reduced so it becomes harder for new ice to form.4. The altitude of the melting ice is now reduced so it becomes harder for new ice to form.

This is a positive feedback loop Less solar radiation is reflected away, and more is absorbed by the ocean A greater quantity of heat is produced The ice melts at a faster rate There is less ice cover in the Arctic region

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Impacts of the increased melting

Total travel distance for a one- way trip from Norway to Japan: Via Panama Canal: kmVia Panama Canal: km Via Cape Horn: kmVia Cape Horn: km Via Suez Canal (Asian Route): kmVia Suez Canal (Asian Route): km Via Northwest Passage: kmVia Northwest Passage: km