Introduction Global warming is a phenomenon that occurs when the earth’s atmosphere traps heat radiating from Earth toward space. Initially the sunlight transmitted was meant to pass through the atmosphere, warm the Earth’s surface, and otherwise pass freely into space. But most of the outgoing heat, however, is absorbed by the accumulated greenhouse molecules in the atmosphere and is re-emitted in all directions, ultimately leading to the warming of the planet. Over the past 50 years, the average global temperature has increased at an unsettling speed. Some human activities like mining and the burning of fossil fuels, emit CO2 and other greenhouse gases into the air.
Global warming is the occurrence of the earth’s atmospheric temperature rising. (WWF, 2014) This is due to the influence of greenhouse gases, including the burning of fossil fuels which emits carbon dioxide. The sun’s rays naturally go through our atmosphere so they can reach the earth’s surface and warm it. Some radiation is reflected off the Earth’s surface and some is absorbed into our Earth’s atmosphere. In the atmosphere, naturally occurring greenhouse gases trap the radiation in a ‘blanket like effect’.
Many animals whom were once living on the land ice have lost their habitats and many animals have died. The sea levels also rose because salt water expands in volume when heated. Global warming has affected winter precipitation as it falls as rain instead of snow, resulting in the seasonal rhythms of streams and rivers to change. Because the precipitation is in the form of rain, this act as an early Spring which leads to ice in the mountains to melt earlier and faster. Global Warming affects climate and climate change may mean that some places will experience more days with very heavy rain and other places may endure more severe, longer droughts.
Today, there is an excess of these heat-trapping gases. With more of these gases in the atmosphere, more heat from the sun is trapped, and therefore warming Earth’s surface. Greenhouse gases that occur naturally may include carbon dioxide, nitrous oxide, water vapor, and methane. For instance, the planet Venus has an atmosphere made mostly of carbon dioxide. As a result, heat from the sun is trapped in the atmosphere and making the planet really hot.
Effects on the Environment: There are profound effects on the environment on account of an increase in our carbon footprints. Due to the rising temperatures and shifting precipitation patterns there have been changes in the growing patterns of plants which has resulted in indigenous vegetation moving to increasingly cooler climates. Sea levels are rising as the temperature of our planet increases and warmer water occupies more space than cooler water. These rising seas will not only erode shorelines and destroy ecosystems but also completely displace the coastal cities and towns. 3.
Greenhouse gases in the atmosphere-Carbon Dioxide, Water vapor and Methane. These gases allow short wavelength radiation from the sun to pass through to the earth’s atmosphere and the solar energy is absorbed by the earth’s surface and lower atmosphere shown in Figure 1. It is then converted to long wavelength thermal radiation and the earth radiates it back to space. Some of the energy escapes through the atmosphere and some is absorbed the greenhouse gases. This causes fluctuations in the temperature, causing climate change.
Greenhouse gases include Water Vapour, Carbon Dioxide, Methane, Nitrous Oxide, Ozone and some artificial chemicals such as Chlorofluorocarbons. Solar radiation reaches the earth’s atmosphere where some of this is light reflected back into space; The rest of the sun’s energy is absorbed by land and the oceans heating earth; Heat radiates from the earth towards space; Some of this heat is trapped by Greenhouse gases in the atmosphere keeping the earth warm enough to sustain life; Human activities such as burning fuels, Agricultural and Land clearing are increasing the amount of greenhouse gases released into atmosphere and
Question: Discuss about global warming and its impact on developing and developed country. Answer: Global warming refers to the increase the average surface temperature of Earth due to effect of greenhouse gases, such as carbon dioxide which is caused due to burning of fossil fuels or from deforestation. The increase in carbon dioxide leads to melting of polar ice caps which increases the sea level and pose danger for the people. The amount of heat which is trapped in the atmosphere depends upon the concentration of greenhouse gases and the time they stay in the atmosphere. The major greenhouse gases are carbon dioxide, methane, ozone, nitrous oxide and water vapour.
This will lead to large environmental changes (Lallanilla, 2015a). If this trend continues, the worst effects will be inevitable and it includes major shifts in climate, ocean acidification, plant and animal extinctions, rising sea levels and extreme weather (Lallanilla, 2015a). One of the impacts is the rising sea levels. There are 5,773,000 cubic miles of water in permanent snow, glaciers and ice caps. The sea level will rise about 230 feet if all glaciers melted today.
This means more Carbon dioxide in the air, which means that there is more heat trapped inside our eco-system. So the greenhouse effect shall be more effective, and the temperature will be higher. What happens when the climate changes? When the climate changes negatively, the weather will change. As the climate warms up, the extreme weather types will be more frequent and they’ll become more severe.