Showing posts with label Climate Change. Show all posts
Showing posts with label Climate Change. Show all posts

Wednesday, August 18

GLOBAL WARMING AND OCEAN

Did you know that ocean absorbs nearly half the volume of Carbon Dioxide (CO2) produced in the world? You might be happy to hear this! But friends it will cost dearly. First the marine life; scientists estimate that the marine life would vanish by 2100 (Really nearer than we think). This is because, as the amount of CO2 in the water increases, oxygen dissolved in the water goes on decreasing. Oxygen is an essential component even for the marine life. Another impact – ‘The Coral Reefs’; one of the main tourist attractions known all around the world…… What will happen to these reefs? They’ll die too!! This is already occurring at an alarming rate. We need to check this immediately.
                                                                      
What should we do???
Do what we are supposed to do. You know it perfectly (For those who don’t know what to do it is wise to kill yourself rather than kill the already Burning Planet).

Some scientists and researchers are trying hard to save the dying coral reefs. What they do is: They take a fresh and living part from a dying coral and create a mini coral garden in the shallow waters of the sea. After a certain period they are ready to be transplanted in the seabed. This is a good venture; we should really be proud of them.

IT IS UP TO US TO CONTRIBUTE SOMETHING. IF ALL OF US CONTRIBUTE TO CHECK THE GALLOPING RISE IN GLOBAL WARMING; THE TOTAL CONTRIBUTION WILL SURELY BE 100%.

START YOUR ROLE NOW!!!!!

Monday, August 9

Without Greenhouse Gasses??? Hey we need it!!!

Without the greenhouse effect, life on Earth would not exist. The Sun emits radiation to the Earth. If we could imagine a flat surface at the top of the atmosphere, that radiation is about 340 watts per square metre (340 W/m-2). Just over 100 W/m-2 is reflected out again by atmospheric aerosols and clouds, and the Earth’s surface, leaving some 240 W/m-2 that heats up the surface of the Earth. The system must be in balance—energy “in” must equal energy “out”—so the Earth needs to re-radiate this amount back into the atmosphere. But the amount actually re-radiated depends on the Earth’s surface temperature: the hotter the surface is the more it will emit radiation. The outgoing radiation takes the form of “long wave” infrared thermal radiation. If the system balanced “naturally”, then the Earth’s surface would have a temperature of about –19° C (-66° F) since at this temperature 240 W/m-2 would be emitted. Obviously, something else must be happening because at such low average temperatures life would not exist. The Earth’s surface is very much warmer than this “natural” level (around 15° C/59° F) and hence far more radiation is emitted than the 240 W/m-2. What happens is that a lot of the Earth’s re-radiation bounces back to the Earth’s surface because it gets absorbed mainly by water vapour and carbon dioxide (CO2) in the atmosphere. Water vapour, CO2, and a few other minor gases act like a “blanket”. The balance is secured as follows:
Incoming solar radiation: + 340 W m-2 Reflected from clouds, the Earth’s surface, etc.: - 100 W m-2 Net incoming radiation absorbed by the Earth = + 240 W m-2

Outgoing radiation: - 420 W m-2 Greenhouse effect: + 180 W m-2 Net outgoing (thermal) radiation = - 240 W m-2