- A long-term change in the Earth’s climate, especially a change due to the increasing in the average atmospheric temperature.
According to NASA, we are currently at this moment:
Up, carbon dioxide: 406.94 part per million.
Up, global temperature: 1.7℉ since 1880
Down, arctic ice minimum: 13.3% per decade.
Down, land ice: 280.0 gigatonnes per year.
Up, sea level: 3.4 millimetres per year.
The Earth’s climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 7,000 years ago marking the beginning of the modern climate era – and of human civilisation. Most of these climate changes are attributed to very small variations in Earth’s orbit that change the amount of solar energy our planet receives.
- Global temperature rise.
- Warming oceans.
- Shrinking ice sheets.
- Glacial retreat.
- Decreased snow cover.
- Seas level rise.
- Declining arctic sea ice.
- Extreme events.
- Ocean Acidification.
A change in global or regional climate patterns, in particular a change apparent from the mid to late 20th century onward and attributed largely to the increased levels of atmospheric carbon dioxide produced by the use of fossil fuels.
Greenhouse gas emissions have increased the greenhouse effect and caused Earth’s surface temperature to rise. The primary human activity affecting the amount and rate of climate change is greenhouse gas emissions from burning fossil fuels.
To change climate on a global scale, either the amount of heat that is let into the system changed, or the amount of heat that is let out of the system changes.
It is apparent that we are in need of reducing the usage of fossil fuels, with what scientists are saying we are able to begin these changes, but do not have the political action and investment to support the changes.
Usage of clean energy is encouraged, things like wind, wave, tidal, and solar energy.
(Shown in Notebook 1, page 57 – 59)