{"id":603,"date":"2022-02-02T09:57:00","date_gmt":"2022-02-02T09:57:00","guid":{"rendered":"http:\/\/earthscaping.dk\/?p=603"},"modified":"2022-04-09T17:42:05","modified_gmt":"2022-04-09T17:42:05","slug":"what-are-greenhouse-gases","status":"publish","type":"post","link":"https:\/\/earthscaping.dk\/index.php\/2022\/02\/02\/what-are-greenhouse-gases\/","title":{"rendered":"What are Greenhouse gases"},"content":{"rendered":"
\"\"
Photo by Blue Ox Studio from Pexels<\/figcaption><\/figure>\n\n\n\n

What are the greenhouse gases<\/h2>\n\n\n\n

The table below shows the major greenhouse gases.<\/p>\n\n\n\n

Greenhouse gas<\/th>Major sources<\/th><\/tr><\/thead>
Carbon Dioxide (CO2<\/a>)<\/td>Fossil fuel combustion; Deforestation; Cement production<\/td><\/tr>
Methane (NH4)<\/td>Fossil fuel production; Agriculture; Landfills<\/td><\/tr>
Nitrous Oxide (N20)<\/td>Fertilizer application; Fossil fuel and biomass combustion; Industrial processes<\/td><\/tr>
F-gasses<\/td>Refrigerant; Electricity transmission; Semiconductor manufacturing<\/td><\/tr><\/tbody><\/table>
The major greenhouse gasses; Fifth Assessment Report<\/a> (Intergovernmental Panel on Climate Change IPCC<\/a>, 2014)<\/figcaption><\/figure>\n\n\n\n

CO2e and Global Warming potential<\/h2>\n\n\n\n

Global warming potential (GWP<\/a>) is the heat absorbed by any greenhouse gas in the atmosphere, as a multiple of the heat that would be absorbed by the same mass of carbon dioxide (CO2<\/sub>). GWP<\/a> is 1 for CO2<\/sub>. For other gases it depends on the gas and the time frame.<\/p>\n\n\n\n

Greenhouse gas<\/th>Chemical formula<\/th>100-year potential<\/th><\/tr><\/thead>
Carbon dioxide<\/td>CO2<\/sub><\/td>1<\/td><\/tr>
Methane<\/td>CH4<\/sub>
<\/td>		25<\/td><\/tr>
Nitrous oxide<\/td>N2<\/sub>O
<\/td>		298<\/td><\/tr><\/tbody><\/table>
Global warming potential (GWP<\/a>) for the 3 major Greenhouse gasses; source: Global warming potential <\/a>by Wikipedia<\/figcaption><\/figure>\n\n\n\n

The effect of greenhouse gases<\/h2>\n\n\n\n

The gasses contribute differently, this is partly due to the concentration and partly due to the effect. The figure below shows the relative contribution of each of the gases.<\/p>\n\n\n\n

\"\"
Licensed under CC-BY by the author Hannah Ritchie<\/figcaption><\/figure>\n\n\n\n

The effect of CO2 emissions on temperature rise<\/h2>\n\n\n\n

In order to determine the effect of CO2<\/a> on temperature increase, we first need to consider which scenario to look at. Scientist have agreed on a list of standardized scenarios. <\/p>\n\n\n\n

Shared Socioeconomic Pathways (SSPs) are scenarios of projected socioeconomic global changes up to 2100. They are used to derive greenhouse gas emissions scenarios with different climate policies. <\/p>\n\n\n\n

The scenarios are:<\/p>\n\n\n\n