Over the years, I’ve learnt some interesting facts about the atmosphere and climate change…
- Water vapour is evaporated from the seas , which covers 70% of the global surface area.
- The warmer air is, the more water vapour it can hold. [1,2]
- The more water vapour there is in the atmosphere, the more cloud cover exists.
- Cloud cover blocks sunlight, reducing global warming.
Conclusion 1: atmospheric temperature is naturally regulated by water vapour.
- Increased atmospheric water vapour increases precipitation (rainfall).
- Increased rainfall increases plant growth.
- Increased carbon dioxide concentration increases plant growth. 
- Increased atmospheric temperature ALSO increases plant growth.
Conclusion 2: “global warming” creates a greener planet. This is a good thing.
Arctic sea ice
- Arctic ice is floating sea ice
- Floating ice displaces the same volume as melted ice. 
Conclusion 3: melted Arctic ice will not contribute to rising sea levels.
Inland glacial ice
- The worst case scenario projections of global warming/climate change estimate that the atmospheric temperature will increase by 5C over the next 100 years. Most estimates indicate a 2C rise over the next 100 years. 
- Average coastal temperature of Antarctica is -10C. The majority of Antarctic ice is much further inland, where temperatures are much much colder (in excess of -50C). 
- Greenland’s ice sheet has an average temperature of -12C in summer. 
Conclusion 4: “Climate Change” will not melt either Greenland or Antarctic land ice.
- Increased atmospheric water vapour increases precipitation.
- Increased precipitation increases polar ice.
- Vast majority of precipitation water is evaporated sea water.
Conclusion 5: as “global warming” increases polar ice, it may even lead to sea levels falling.
Greenhouse effect of CO2
- The greenhouse effect of CO2 is logarithmic . This means that for every doubling of CO2 concentration in the atmosphere, the greenhouse effect will only increase by 1.5%.
- Global atmospheric temperature has risen by about 1C over the last 150 years (since the dawn of the industrial revolution).
- Atmospheric CO2 concentration has risen from 280ppm to 415ppm over the last 150 years, an increase of just under 50% (135ppm).
- Assuming a worst case scenario, that all the temperature rise is attributable to human CO2 emissions: 50% increase in CO2 concentration corresponds to 1C rise. This means that a temperature rise of 3C would require increasing CO2 concentration by 200% – to over 800ppm.
- At the current rate of CO2 increase, it would take us over 400 years to reach 800ppm.
Conclusion 6: We are nowhere near to increasing the atmospheric temperature by 3C.
The biggest greenhouse gases
- Human activity contributes only about 4% of global CO2 emissions (29 gigatons per year compared to 750 gigatons of natural CO2 emissions). 
- CO2 contributes 26% to the overall greenhouse effect.
- Water vapour is by far the most significant greenhouse gas, contributing an estimated 60% of the overall greenhouse effect. 
- There is no way to control the amount of water in the atmosphere.
Conclusion 7: Human efforts have very little impact on global warming.
So what do you think? Does this make you feel less alarmed about climate change? Feedback and corrections welcome.