Greenhouse Effect Essay

Nobody ignores the issue of climate change. Many of us can perceive its effects. Heat wave in summer, winter without snow, climate disruption ("there are no seasons"), floods in a corner of Europe while another suffered terrible drought, climate change manifests itself in forms diverse.

In 1824, Joseph Fourier, a French physicist, nicknamed "greenhouse effect" phenomenon demonstrated by gravure thermometer Horace Benedict de Saussure in the late 18th century: the temperature on Earth has increased by the atmosphere that traps a part the infrared radiation emitted by the Earth.

Svante ARRHENIUS announced as early as 1896 by burning coal, men would warm the planet via an enhanced greenhouse effect and thus was the first to highlight the risk

The solar radiation entering through the Earth balance of thermal radiation emission. The presence of greenhouse substances limit cooling by thermal radiation and thus leads to a warming (Richard Lindzen).

The term "greenhouse effect" is somewhat excessive because it is the blocking convection which keeps the high temperature inside the greenhouse.

Water vapor, methane, carbon dioxide and nitrous oxide, which are the main greenhouse gases (GHGs) help to trap the returned energy, increasing the average temperature of the Earth. Indeed, it is the gas polyatomic structure (at least 3 atoms) that hold the infrared radiation instead of diatomic molecules (99% of the atmosphere) that are too simple structure.

Note the dual role of clouds in global warming: vis-à-vis solar radiation, clouds act mainly as an umbrella that refers to space much of the Sun 's rays. The reflectivity, or albedo, clouds thick at low altitude, so is very high, on the order of 80%. For cons, the cirrus clouds are made up of altitude ice crystals have a very low parasol effect since they are transparent but strongly contribute to the greenhouse