Experts urged to ratify Minamata Convention to phase out mercury-added products পারদযুক্ত পণ্যের ব্যবহার বন্ধে মিনামাতা কনভেনশন অনুমোদনের আহ্বান সেন্টমার্টিন সৈকতে প্লাস্টিকের আগ্রাসন 72 birds die eating pesticide-treated masakalai Educate girls to save the planet শিশুর সর্দি-কাশি সারানোর ঘরোয়া উপায় 50 Books All Kids Should Read Before They’re 12 24 thousand under 5 children die of pneumonia in Bangladesh annually গ্রিনহাউস গ্যাস কমানোর লক্ষ্যে নানা উদ্যোগ Maldives: Eco-friendly product export destination for Bangladesh

Weatherwatch: Charles Keeling’s CO2 curve shows drastic rise in 60 years

A remarkable run of observations began 60 years ago at a weather station high on a volcano in Hawaii. Charles Keeling began monitoring carbon dioxide in the clean air at 3,400 metres (11,150ft) on Mauna Loa, far away from vegetation and urban pollution. His first measurements in 1958 showed 315 parts per million (ppm) of CO2 in the atmosphere, and what caught him by surprise was that every year after that the levels of CO2 rose relentlessly in an upward curve, thanks to the carbon pollution pumped into the Earth’s atmosphere.

Now the CO2 has reached more than 400ppm, probably the highest for 800,000 years. It sounds a tiny amount of extra CO2, but it is having a huge impact on the climate by trapping more heat on Earth, driving world temperatures upwards. CO2 in the air is now so plentiful that plants are growing fewer leaf pores to absorb the gas than they did centuries ago, and more CO2 is being absorbed into the world’s seas, making them more acidic.

Keeling’s curve of rising CO2 levels is a shocking picture of how much the world’s atmosphere has changed in 60 years, with no end in sight.

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Posted by on Sep 4 2018. Filed under Climate change, News at Now, News From Roots. You can follow any responses to this entry through the RSS 2.0. You can leave a response or trackback to this entry

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