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Global warming and_its_effect
The document discusses global warming, its causes, and its significant impacts, including droughts, floods, rising ocean temperatures, and natural disasters like tornadoes and hurricanes. It emphasizes the greenhouse effect as the primary cause and highlights the detrimental effects on agriculture, water resources, and coastal communities. The urgency for collective action to mitigate global warming is also stressed.
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Global warming and_its_effect
- 1. GLOBAL WARMING ANDIT‘S EFFECT
- 2. CONTENT Introduction ofGlobal Warming Causes Of Global Warming Impacts Of Global Warming Droughts Floods Level Rising Temperature Of Oceans/sea Tornados Hurricanes The Melting Of Mountain Glacier The Reduction Of Snow Cover Coastal Erosion
- 3. INTRODUCTION Global Warmingis the term used to describe a gradual increase in the average temperature of the Earth’s atmosphere and its oceans, due to which permanently change occurs in the Earth ‘s climate.
- 4. CAUSES OF GLOBALWARMING Most of the climate scientists are agree that the main cause of the Global Warming is due to the “green house effect”. They may be other cause like Respiration Mining activities Rapid industrialization Increased in auto mobile use
- 5. GREEN HOUSE EFFECT CARBONDIOXIDE(C02) METHANE(CH4) NITROUS OXIDE(N20) CHLORO FLUORO CARBONS(CFCS)
- 6. SOURCE OF GREENHOUSE GASES
- 7. FLOODS & DROUGHTS CAUSEDBY GLOBAL WARMING
- 8. DROUGHTS CAUSED BY GLOBALWARMING A drought is an extended period of dry whether caused by a lack of rain Increased temperature cause more evaporation Some places will receive greater concentrations of rain and other places will receive less(droughts)
- 9. HOW FLOOD ISCAUSED BY GLOBAL WARMING A flood is an overflow of water that submerges land which is usually dry The rate of evaporation from the ocean seems to be incresing
- 10. EFFECT OF FLOODTO IRRIGATION Embankments of barrages and rivers Damage underground piping system Destroy agricultural crops Affect the water table Damage Head Canal Affect Whole Irrigation System
- 11. LEVEL RISING TEMPERATURE OFOCEAN &SEA
- 12. RISING TEMPERATURE OFOCEAN&SEA Rising temperature of ocean and sea may be more significant than the direct effect of higher temperature. Because…. The world's agricultural output is heavily dependent on irrigation. Out of a global cropped area of 1500 million ha, 16% is irrigated. Global warming is likely to have a major impact on the hydrological cycle and consequently on irrigated agriculture.
- 13. RISING TEMPERATURE OFOCEANS & SEA As we have discussed that atmospheric temp raises due to green house effects so it raises the temp of sea/ocean on the following two mechanism Two major mechanisms are causing sea level to rise. First, shrinking land ice, such as mountain glaciers and polar ice sheets, is releasing water into the oceans Second, as ocean temperatures rise, the warmer water expands. Trapped within a basin bounded by the continents, the water has nowhere to go but up. :
- 14. RISING TEMPERATURE OFOCEANS & SEA The consequences of sea level rises due to temp include Threats to coastal communities Some 40% of the world’s population lives within 62 miles of the ocean.
- 15. TORNADOES AND HURRICANES CAUSEDBY GLOBAL WARMING
- 16. TORNADOES Tornadoes: Atornado is rapidly spinning air that develops from a thunderstorms and is on the ground. The ingredients for a tornado are a thunderstorm, winds changing speeds with height and rapidly rising air.
- 17. HURRICANES Hurricanes: Ahurricane is a huge organized thunderstorm complex that develops over the ocean The ingredients are warm ocean water, weak upper level winds, and low pressure
- 18. IMPACTS OF TORNADOES& HURRICANES Flooding: Heavy rains and ocean waters brought ashore by strong winds can caus e flooding in excess of 50 cm (20 in) over a 24 hour period. Impacts to Agriculture As hurricane winds, rainfall, and storm surge cause direct and indirect effects on the environment, this can also impact agriculture. Storm Surge: An abnormal increase in the ocean's level, sometimes in excess of several meters high.
- 19. MELTING OF GLACIERSCAUSED BY GLOBAL WARMING
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- 21. MELTING OF GLACIERS Over a Thousand years ago, Asians used to irrigate their lands by the melted water from glaciers. During Warm season, snow melts slowly, releasing a steady flow of water. Over the last few decades, Glaciers are melting at a torrid pace as an adverse effect of Global warming & climate change.
- 22. MELTING OF GLACIERS Effects of Glacier Melting: Reduced water for agricultural use Shrinkage of river based irrigated land Contamination of coastal groundwater supply More floods & droughts Mudslides, dam break etc.
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