Changing Climatic Factors
Download as PPTX, PDF1 like1,082 views
Climate describes typical weather conditions that prevail over extended periods in a region, while weather describes the hourly or daily conditions. Climate change is identified by long-term shifts in temperature, precipitation, winds and other indicators. The IPCC reported in 2007 that the climate is changing rapidly due to human activities like burning fossil fuels and deforestation being the primary factors. If aggressive action is not taken to reduce emissions, global temperatures could rise significantly by 2100 leading to major impacts.
Changing Climatic Factors
- 1. BY -
- 3. CLIMATE Climate describes the typical conditions of temperature, relative humidity, cloudiness, precipitation, wind speed and direction, and other meteorological factors that prevail globally or regionally for extended periods. Weather describes the hourly or daily conditions that people experience each day. and WEATHER
- 4. Climate change is a long-term shift in weather conditions identified by changes in temperature, precipitation, winds, and other indicators. Climate change can involve both changes in average conditions and changes in variability, including, for example, extreme events.
- 5. There have been long-term and short-term climate cycles for hundreds of millions of years. Dramatic and rapid climatic changes. IPCC report of 2007 said : Earth’s climate is changing rapidly and that human activities are the primary factors causing this change. These factors are external to the climate system, they are referred to as 'climate forcers‘ Not all of those factors that have been responsible for changes in earth's climate in the distant past are relevant to contemporary climate change.
- 6. FACTORS NATURAL HUMAN Burning fossil fuels Greenhouse effect Deforestation Pollution Volcanic activity Earth’s orbit Solar Output Ocean currents
- 8. 2. CHANGES IN SOLAR RADIATION
- 9. 3. VARIATIONS IN THE EARTH’S ORBIT - CYCLES
- 10. 1.
- 12. 2. Deforestation Forests are cut down or burned can no longer store carbon, and the carbon is released to the atmosphere. Act like a blanket and restrict the rate at which Earth’s surface can radiate heat to space Result is global warming Today, current levels of carbon dioxide in the atmosphere are higher than at any time during the last 650,000 years. 2010 was the hottest year on record, worldwide.
- 13. 3. Burning of fossil fuels Fossil fuels are the carbon-rich remains of plants and animals that have been buried and compressed under sediments for millions of years. non-renewable resources more than 90% of greenhouse gas emissions come from the combustion of fossil fuels.
- 15. In 2007, the IPCC published a report predicting that average global surface temperatures will likely rise by an additional 2 to 11.5 degrees F (1.1 to 6.4 degrees C) above the 1980s-1990s average by 2100. Result in an increase in global sea level up to two feet or more. An enormous impact on our planet’s people, ecosystems, cities, and energy use. If we take aggressive action to reduce emissions, the temperature change could be modest. If we continue on our present course, however, the amount of change will be substantial. changes are anthropogenic