In my environment discussions, a constant perplexing feature is that the obviously engaged listeners, know zero basics about climate change. How is this possible about a topic of world interest for over two decades?
The climate change crisis is our defining moment and to make the movement work, humanity has to be involved and active in this issue. Hence we must know what the subject is. In the ensuing paragraphs, I have tried to explain some of the basics of this worldwide crisis which engulfs us.
Our world achieved sustainable balance over hundreds of millions of years of events, including five mass extinctions and several ice ages. This balance having been achieved, humans made their appearance. Climate motion was circular and sustainable.
The above climate is in sustainable circular motion at the worldwide temperature average of about 15 degree centigrade. The moment we increase or decrease this average, it effects the balance of climate. A small average increase, creates huge variations.
- Living beings consumed Oxygen; emitted Carbon Dioxide (CO2). Trees and oceans absorbed this CO2; emitted Oxygen. This kept a balance, where CO2 stabilised at 0.03% of the atmosphere.
- The Earth orbits the Sun, tilted at an axis of 23 degrees. In the January-June period, the tilt brings Northern hemisphere nearer to the Sun, creating summer. In July-December period, the tilt brings Southern hemisphere nearer the Sun, creating the southern summer. Vice-versa for winters, thus keeping a balance.
- The Sun is our warming engine. The rays from the Sun are absorbed by our atmosphere, while some are reflected out by the glaciers (which are white). We take just enough heat. Trees are also coolants absorbing some heat and collecting water. Similarly, foliage under the sea, thrives on the heat absorbed by the oceans and creates its own balance of CO2/Oxygen.
- The Gulf Stream is an underwater wave, circulating around the world, bringing rain, coolness, warmth, dryness and temperature variations. Similarly, Jet streams are movement of air flowing out of the North/South, bringing coolness in the summer and cold in the winter, also dryness and temperature variation. Air movement is caused by temperature changes, gravitational effect and revolving motion of the Earth.
- The glaciers and frozen earth are big players in this climate balance. They reflect rays (heat); create coolness; in the freeze (permafrost) a huge amount of methane and CO2 is absorbed. Over millions of years of freezing, massive amounts of these gases have thus been stored.
- Due to increase in population; overuse of hydro-carbons (petrol, coal etc); cutting of trees; CO2 levels have gone up from 0.03% to 0.04% of the atmosphere. CO2 absorbs heat.
- As CO2 increases, it causes global warming. This rise in temperature, starts the melting of the glaciers.
- As the glaciers melt they reflect less heat, which in turn causes more global warming.
- As warming rises, it effects the underwater foliage and the trees. End result, there is less absorption of CO2, leading to further heat. This is a spiralling cycle.
- The Gulf Stream and the Jet streams are effected by the rise in temperature, thus bringing climate change to the world.
- Eventually, the heat will become so significant that millions of years of permafrost will melt, releasing the trapped methane and CO2. Methane is 25 times more potent than CO2, as a heat absorbent. Average temperatures after that, could rise several centigrade. It would bring an end to existence, as we know it.
- Lastly, as temperature increases, all glaciers will melt and the sea waters will rise several feet. The coastal regions of the world will be decimated. For instance Manhattan will be 77% underwater.
*picture is from publicdomainpictures.net
