Feedback Reigns: Home

Climate Change:

  • Evidence,
  • Dangers, and
  • Solutions
** Evidence for Climate Change

The climate records show how our climate has changed and is changing.

Sea Level Rise

Sea level rise is THE yardstick for global warming“.

NASA identifies the importance of sea level rise, so I present this first.  Further down this page, I present the data gathered on other key indicators of climate change.

 Graph: Sea Level Change since 1993 (NASA: Climate: Indicators)

This shows the rise of sea levels since 1993:  an average of 3.16 millimetres a year.  And levels are now rising faster.  Some claim that global warming has paused – the sea level data rebuts this.   (Read More …)

See below for data on other key indicators of climate change.


** Dangers of Climate Change:

The main danger of the current global warming is that:

  • the current warming is causing more warming,
  • which will cause further warming,
  • which will cause further warming and so on,
  • forming an uncontrollable vicious cycle of escalating temperature.  (Read More on Amplifying Feedback …)

** Safe Climate News

Musical Protests against Inaction on Climate: June 2016
See “Warm is Not Cool” Stephen Taberner

To scan the news items,  click  on “News” in the above menu.
Apologies, the news has not been updated for a while

** Considering solar panels: Do they stack up financially?

Click here to see a way of checking whether solar panels are a good investment for your home, and to for a free spreadsheet to do the sums.


** Solutions to Climate Change

Australia could stop its emissions of carbon dioxide within ten years.  The organisation “Beyond Zero Emissions” has developed detailed plans for this transition.

Australia and other countries need to act on these sorts of plans.  Australia could:

  • Generate all electricity from renewables. Renewables can generate electricity 24 hours a day.  For example, the Nevada solar plant shown below.  It collects and stores heat to generate electricity day and night.  Australia will not need coal, gas or nuclear power.  (Read More …)
Crescent Dunes Solar Thermal Power Station: Nevada USA
Crescent Dunes Solar Thermal Power Station: Nevada USA

 

  • Use renewable electricity to power a high-speed rail service on the Australian east coast.  (Read More …)
  • Modify land use, forestry and agriculture to cut emissions. (Read More …)
  • Modify buildings to cut energy use. (Read More …)

** Evidence for Climate Change: The key indicators

One key indicator of climate change is “sea level” which is covered above.  Others are:

Carbon Dioxide Concentration in the Air

The recent increase in the carbon dioxide in our air, compared with the levels over the last 400,000 years (NASA)

This shows the movement of the “concentration of carbon dioxide in the air” over the last 400,000 years.   Since 1950, the level has soared to above 400 ppm and is increasing by about 2 ppm each year.  Before 1950 the level only moved between 180 ppm and 300 ppm for the 400,000 years shown on the graph.  And, the levels stayed in this range for 650,000 years.   (Read More ..)


Average Global Temperature

Global Temperatures 1880 - 2015 (NOAA)

This shows the movement of the  “average global temperature” between 1880 and 2015.  Temperatures have risen by 0.67 degrees Centigrade per century since 1880.  The hottest years shown on this record were the last two: 2014 and 2015.  Note that 2016 was hotter again.  (Read More ..)


Arctic Sea Ice Area

Graph: The Average September Area of Arctic Ice (NSIDC)

This shows the movement of the “average area of Arctic ice in September” over time.  The average area of sea-ice has  declined by 13.7 percent per decade.  (Read More ..)


Antarctica Mass Variation

Antarctica Mass variation (NASA: Climate Indicators)

This  shows the changes in the “mass of ice over Antarctica” between 2002 and 2013.  Antarctica has lost 147,000 million tons of ice per year – and this water is contributing to sea level rises.   (Read More ..)


Greenland Mass Variation

Greenland Mass Variation (NASA: Climate Indicators)

This shows the change in the “mass of ice over Greenland” since 2002.  Greenland has lost 258,000 million tonnes of ice a year since 2003.   (Read More ..)


The Acidity of our Oceans

The Acidity of our oceans is rising as carbon dioxide in the atmosphere increases.  (Read More ..)


** Conclusions of Climate Science

These key indicators are part of the evidence for concluding, beyond reasonable doubt, that:

  • Our planet is warming
  • Our climate is changing
  • Human emissions are the cause
  • The critical emission is carbon dioxide from burning fossil fuels

Causes of Climate Change: US National Aeronautics and Space Administration NASA

Scientists no longer debate whether human emissions are behind global warming.  (Read More ..)
The Scientific Consensus on Climate Change (Oreskes, 2007, page 9 of 36) from the website of the Department of Planetary Sciences: University of Arizona

The American Association for the Advancement of Science came as close as such a respectable institution can to screaming an alarm in March 2014.  “As scientists, it is not our role to tell people what they should do … but human-caused climate change [is threatening] abrupt, unpredictable and potentially irreversible changes.”  … The most distinguished scientists from the country with the world’s pre-eminent educational institutions were trying to shake humanity out of its complacency.
(Climate Change Deniers have Won: The Guardian: 22 March 2014)

 Misleading information

Powerful lobby groups are campaigning to mislead the public and deny well-established scientific knowledge.
(The Merchants of Doubt: How a Handful of Scientists Obscured the Truth on Issues from Tobacco Smoke to Global Warming: Oreskes & Conway)

 


** Climate Restoration
The recent increase in the carbon dioxide in our air, compared with the levels over the last 400,000 years (NASA)
The recent increase in the carbon dioxide in our air, compared with the levels over the last 400,000 years (NASA)

For the 650,000 years before about 1950, carbon dioxide levels stayed between 180 and 300 ppm.  So we know the planet can keep a human-friendly climate while levels are in this range.  However, now levels are above 400 ppm.  While levels remain above about 320 ppm, the planet will continue to accumulate heat and temperatures will keep on increasing.  We could easily destroy our human-friendly climate.

The only solution that we can adopt with any confidence is to move our climate back to a state in which it has already demonstrated stability.  We need to reinstate the conditions similar to those in about 1940, as suggested by the above indicators of climate change, that is:

  • Cut carbon dioxide in the air from 400 ppm to below 300 ppm.  One way to do this is to cut emissions by slashing the burning of fossil fuels.  Another is to increase the drawdown of carbon dioxide from the air and storing it by expanding forests
  • Cool the planet by 0.6 C from the 2014 average global temperature
  • Restore the lost ice in the Arctic, Antarctic and Greenland,
  • Decrease ocean levels and ocean acidity

We need to act with wartime urgency.  This is to reduce the chances of the current warming tipping the climate into an irreversible warming spiral. (Read More …)

Science is clear about how to tackle climate change.  And, as identified above, we have detailed plans for moving to a zero emissions economy.

The Benefits of a Zero Emissions Economy
  • Reduce the impacts and risks of climate change
  • Health and environmental benefits of clean air
  • Jobs and knowledge in industries that can prosper long into the future.

Searching this Site

To search all the pages of this site:

  • Click on the search icon
  • It’s the magnifying glass icon at the top right of the screen, and
  • Type your search word or words, e.g. warm AND flood

My Policy on Comments

I welcome constructive comments about this site.

You can send me your comments via email or by writing comments at the foot of a relevant page.

As quite a few comments are spam, I now only  publish comments that mention something about climate change.


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2 thoughts on “Feedback Reigns: Home”

  1. Thank you for this useful compilation of information – VERY useful to have on hand if one is having a debate with a denier of climate change
    Regards
    Pat Phair

  2. About your news items: I always read through your summaries and open the links to articles that interest me. It is always a productive and interesting exercise. I appreciate that what you are doing is a demanding exercise which you do out of a sense of commitment, so I am hesitant to suggest anything that might involve you in more work, such as a consolidated reference compendium of your back copies. That would be the difference between a monthly information service and a reference collection. Whatever, what you are currently doing is much appreciated. Christopher N

    [Reply: The news items are now all on the web, so this news can now be searched and is becoming a reference collection]

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