effect of green house effect on global warming

Green house effect is an expression referring to the process to describe how short-ave radiation passes easily through the atmosphere to reach Earth’s surface whereas outgoing radiation passes easily through the atmosphere to reach Earth's surface whereas outgoing radiation is absorbed & reradiated by water vapor droplets & cabon-di-oxide.the burning of fossil fuel is a reason for the accentuation of this effect. The current annual increase of carbon-di-oxide is 0.4%.

the effects of green house effect could be as follows:-

1)Future sea level rise: Environmental & Socio-political considerations

two processes will contribute to the rise in mean sea level. An atmospheric warming of several degrees would warm the upper layer of the ocean, causing it to expand in volume like the liquid mercury in a hospital thermometer. Melting of mountain top glaciers would find it's ways into oceans by the increased run-off & such melting of mountain glaciers would raise the average sea level by 20cm - 100cm (with the best guess of 60cm) by the next century. The zones of greatest vulnerability would be low lying flat areas. For eg.-a study on Nile delta found that a rise of sea level by 100cm will submerge 15% of Egypt's settlement & 15% of cultivable area. Richard warrick & Atiq rehman has pointed out local factors like upliftment & subsidence of the coastal areas, the local biotic system 7 efforts to protect coastal structures by human societies will play vital role.

2)effect of climate change on the food production:

Rapid change in temperature & precipitation will have negative effect on the food production even if agricultural technology, enhanced by modern chemistry & biotechnology achieves dramatically increase in yields per hectare, the amount & location of lands suitable for the traditional practices may shrink/change dramatically. Weeds & pests will profit from this change. It should be noted that already 80% of the world's potential arable land has been broken.

3)Effect of climate change on shared freshwater resources:-

Even if a green house warming doesn't increase the frequency & severity of storms, it is likely to alter the timing, duration & distribution of rain & snowfall. As Gleick observes, there will be little reason for confidence in the ability of current models to predict the regional distribution of rainfall in a warmer world. For e.g.-It would be unpredictable, which regions/river suggest that mid-latitude areas would be drier especially  in summer. The most reliable conclusion is simply that precipitation, run-off & soil moisture-all critical variables in areas which depend on rain-fed agriculture- will be quite different from what they are today. Internationally shared resources of clean, potable water will be stretched to cover larger irrigated areas & serve increasingly thirsty population.

4)Effect of climate change on weather related disasters:

Frequency of large storms & extreme weather conditions could be altered as well. The evidence linking such effects to an enhanced green house effect is inconclusive at present with the exception of some model results that suggests a likely increase in the number of extreme rainstorms. Milchell & Ericksen after reviewing historical data argue it is poor both within the country & among the nations who will experience the largest damages from weather related disasters as measured by the percentage of annual income lost in these events.

5)Effect of changing climate on population:

the more rapidly the population grows the more difficult it will be to deal with the effects of rapid climate change. Poor people living in low lying flat areas, those with no land & depending on subsistence agriculture would be seriously affected.Keyfitz suggests there will be an immense urgency for the migration from  poor to wealthy nations. The advanced industrial nations would be buffered for some time by their wealth & technological options.

6)change in air patterns & ocean currents:-

Due to global warming temperature of Polar Regions is expected to rise by 2 to 3 times while at lower altitudes near the equator that would be 50%-75% of global average. The temperature gradient between cold Polar Regions 7 warm tropics would sink leading to alteration of ocean currents & patterns of air. For instances, if the Gulf Stream were to move westwards by 200 Km from its present position near European continent. It would lead to hotter Europe, on an average, & colder & wetter Great Britain.