GLOBAL WARMING

A GREENHOUSE EFFECT

GREENHOUSE GASES

Gases in an atmosphere that absorb and emit radiation within the thermal infrared range.

Water vapor (HO)

Carbon dioxide (CO2)

Methane (CH)

Nitrous oxide (NO)

Ozone (O)

CFCs

Without greenhouse effect our planet would be extremely cold and life on it wouldnt be possible

at all!!!

PROBLEM: INCREASED GREENHOUSE EFFECT DUE TO INCREASED CONCENTRATION OF GREENHOUSE GASES

RESULT: GLOBAL WARMING

the rise in the average temperature of Earth's atmosphere and oceans

Natural occurrences which can increase global temperature:

Variations in solar activity

Fluctuations in ocean currents

Volcanic eruptions

Orbital cycles (eccentricity, axial tilt, and precession of the Earth's orbit- Milankovis cycles)

There is no doubt that increasing concentrations of greenhouse gasses due to the human impact (mostly by burning fossil fuels and releasing methane in agricultural production) is responsible for rapid global warming and, consequently, climate change.

Danger also lies in positive loop feedback:

Less ice on poles, the less is Earths albedo (reflection

coefficient) and greater warming effect

The warmer the ocean water, the less is its capacity for absorbing CO thus greater capacity of CO in the atmosphere.

Shifting of ocean currents

CONSEQUENCES OF GLOBAL WARMING:

Climate change (natural catastrophes- floods and stronger hurricanes and typhoons in humid areas and increased drought an already dry areas of the world).

Melting of polar ice and glaciers (rising of the sea level, shrinking drinking water supplies, polar animals endangered due to the loss of habitat)

Shifting of zonal vegetation and ecosystems which can greatly affect agriculture and production of food.

http://climate.nasa.gov/warmingworld

www.climatecrisis.net