Climate Change Causes And Consequences Pdf


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24.01.2021 at 09:03
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Climate change

What is global warming? What causes global warming? What is climate change? Is it different from global warming? What is a climate change impact? What does global warming have to do with severe weather, like storms, heat waves, droughts, and hurricanes?

If global warming is real, why is it so cold and snowy this winter? The difference between climate and weather. What does global warming have to do with rising sea levels? What is ocean acidification? What does production of meat and dairy products have to do with climate change?

What does climate change have to do with health? How does climate change affect the food supply? What is a carbon footprint, and how can I reduce my carbon footprint?

What are renewable sources of energy? What is energy efficiency? What is climate change adaptation? What is climate change mitigation? What is climate change resilience? What is the United States doing to address climate change? What are corporations doing to combat climate change? What is the United Nations doing to combat climate change?

What is climate finance? Is there hope that we will be able to address climate change before it is too late? Other recommended climate change FAQs elsewhere on the web.

Global warming refers to the increase in average global temperature since the Industrial Revolution. The average global temperature has increased by about one degree Celsius 1. Global warming is an ongoing process ; scientists expect the average global temperature to rise an additional 0. Land and ocean temperature index from to , using as the base period. Without greenhouse gases , the average temperature on Earth would be zero degrees Fahrenheit, instead of today's roughly Human activities , notably the burning of fossil fuels i.

Other activities , including deforestation cutting down trees and raising livestock, also emit greenhouse gases. Higher concentrations of these greenhouse gases in the atmosphere trap more heat on Earth, causing an anthropogenic i. Climate scientists agree that human activity is the main driver behind the global warming we are experiencing.

The terms climate change and global warming are often used interchangeably, but climate change broadly refers to persistent changes in average weather e. The climate change we are currently experiencing, however, is caused by human activity see question 2.

The rise in average global temperatures because of human activities has many impacts on the planet, including more intense and frequent droughts and storms, melting glaciers and ice sheets, rising sea levels, warming oceans, and ocean acidification see question 8. People around the world are already feeling the impact of climate change on the environment.

Changing weather patterns can ruin crops and cause serious water shortages. Rising sea levels are threatening low-lying islands and coastal cities.

Tropical and insect-borne diseases are spreading as their hosts move into new habitats that were previously too cold for them to survive. Climate change represents a significant threat to the health and well-being of human societies, especially in communities that lack resources and are therefore ill-equipped to deal with the effects of a warmer climate. A rise in global temperatures increases the severity and likelihood of storms, floods, wildfires, droughts, and heat waves. In a warmer climate, the atmosphere can collect, retain, and drop more water, leading to changing precipitation patterns.

Increased precipitation can help support agriculture, but precipitation is increasingly coming in the form of more intense single-day storms, which damage property, infrastructure, and lead to loss of life in impacted areas.

Over the past few decades, the United States has experienced more heat waves and fewer cold waves. Since the s, the length of the heat wave season has increased in many cities by more than 40 days. Today, major U. Warmer sea surface temperatures make it easier for hurricanes to form. Because of human-caused global warming, it is expected that the rainfall rates from hurricanes will increase, the intensity of hurricanes will increase, and the proportion of storms that reach a Category 4 or 5 level will increase.

It is difficult for researchers to attribute a specific weather event to global warming. Nevertheless, climate scientists are confident that higher average global temperatures are making extreme weather more likely and severe. The United States is seeing a clear increase in the number of destructive weather and climate disasters combined with increased development in coastal and river floodplains i.

The table below from National Oceanic and Atmospheric Administration NOAA shows the number and impact of billion-dollar disasters by decade from Inflation-adjusted cost of droughts, flooding, freezes, severe storms, tropical cyclones, wildfires, and winter storms.

The key to understanding the answer to this question is the difference between weather and climate. Weather is what is happening outside today, while climate is an area's typical weather. It might be raining in Los Angeles today, but typically the city's climate is dry. As the average global temperature increases, winters are more likely to be shorter and less snowy. However, there are still cold days and colder than average years due to changes in atmospheric circulation associated with weather patterns.

For snow to occur, moisture and freezing air temperatures must be present. Both these conditions are still likely in the winter, especially in areas that experience temperatures well below freezing so even if you increase the average temperature of that location, many winter days will still be below freezing. Therefore, global warming does not prevent snowy winters. In fact, in some areas, global warming may result in more intense winter storms.

For example, because the increase in sea surface temperature feeds more intense storms, it is likely that places like the Northeast United States will see more intense winter storms although they may be more infrequent. Scientists expect, on average, winters to become shorter as global temperatures continue to rise, which is likely to result in fewer snowy days overall. The blue line shows sea level as measured by tide gauges ; the orange line shows sea level as measured by satellites Source: U.

Global warming contributes to rising sea levels in two main ways. First, warmer temperatures cause glaciers and land-based ice sheets to rapidly melt, which moves water from land to the ocean. Areas experiencing significant ice melt include Greenland, the Antarctic, and mountain glaciers around the world. Second, thermal expansion , the process by which warmer water takes up more space, is causing the ocean to increase in volume, which leads to rising sea levels.

Other factors affect sea levels, and the combination of all these factors leads to different rates of sea level rise across the planet. Local factors that can cause the sea level to rise faster in certain areas include ocean currents and sinking ground surfaces known as subsidence.

Since , global average sea level has increased by eight and nine inches. Under a low-emissions scenario, models project that sea level rise will increase about one foot above levels by the end of the century. Under a high-emissions scenario, sea level could rise more than eight feet above levels by In either case, this would increase the risk of coastal flooding and endanger millions of people living in low-lying coastal areas like New York, Los Angeles, and Miami.

The ocean is a central component of the carbon cycle. Carbon constantly cycles between the ocean, land, and atmosphere this is called the carbon flux. Sea water absorbs 25 to 30 percent of carbon dioxide emissions.

As humans introduce more carbon dioxide into the atmosphere see question 2 , the ocean is absorbing a greater volume of carbon dioxide. This changes the ocean's chemical composition and is referred to as ocean acidification. The pH value of the ocean has decreased by 0. This change is enough to affect many marine organisms. For example, acidification stunts shellfish shell formation and can even cause shells to dissolve. Source: EPA. Livestock contribute to climate change both directly, through their digestive processes, and indirectly, because of the vegetation that is cleared to make room for animal agriculture.

Agriculture as a whole is responsible for 10 percent of U. Global agricultural emissions come from the digestive process of ruminant animals such as cows, sheep, and goats , manure left on pastures, synthetic fertilizers, rice cultivation, burning to clear land, and soil and crop residue management. Livestock, especially cattle, produce methane through their digestion.

Livestock manure also emits methane. Taken together, livestock and manure emissions are responsible for 38 percent of total U. Methane is a potent greenhouse gas that has 25 times the heat trapping impact of carbon dioxide over a year time period. Forests have often been cut down or burned to obtain land for livestock production, which releases carbon dioxide into the atmosphere and destroys a natural carbon absorber.

Economic development and population growth are leading to greater meat and dairy consumption worldwide, making livestock a rising contributor to climate change. There are ways to reduce greenhouse gas emissions from livestock operations, including capturing methane from manure and changing animal feeding practices.

Rising global temperatures exacerbate heat-related diseases , such as heat exhaustion and heatstroke, as well as cardiovascular, respiratory, and kidney diseases. Extreme heat kills about people in the United State every year.

What is climate change? The definition, causes and effects

Climate change, also called global warming, refers to the rise in average surface temperatures on Earth. An overwhelming scientific consensus maintains that climate change is due primarily to the human use of fossil fuels, which releases carbon dioxide and other greenhouse gases into the air. The gases trap heat within the atmosphere, which can have a range of effects on ecosystems, including rising sea levels, severe weather events, and droughts that render landscapes more susceptible to wildfires. There is broad-based agreement within the scientific community that climate change is real. The U.

This site uses cookies to improve your experience and deliver personalised advertising. You can opt out at any time or find out more by reading our cookie policy. Climate change is the catch-all term for the shift in worldwide weather phenomena associated with an increase in global average temperatures. It's real and temperatures have been going up around the world for many decades. Reliable temperature records began in and our world is now about one degree Celcius hotter than it was in the period between and — commonly referred to as the "pre-industrial" average. The change is even more visible over a shorter time period — compared to average temperatures between and , was 0.

The atmosphere is a dynamic fluid that is continually in motion. Both its physical properties and its rate and direction of motion are influenced by a variety of factors, including solar radiation , the geographic position of continents , ocean currents , the location and orientation of mountain ranges, atmospheric chemistry , and vegetation growing on the land surface. All these factors change through time. Some factors, such as the distribution of heat within the oceans , atmospheric chemistry, and surface vegetation, change at very short timescales. Others, such as the position of continents and the location and height of mountain ranges, change over very long timescales. Therefore, climate, which results from the physical properties and motion of the atmosphere, varies at every conceivable timescale. Climate is often defined loosely as the average weather at a particular place, incorporating such features as temperature , precipitation , humidity , and windiness.


Rising temperatures are already driving changes in climate around the globe See the frequently asked questions below to learn more about the causes of climate change, why it matters, and what we Climate models that account only for the effects of natural processes other/delawarecops.org (pdf, 36 pp., MB).


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Climate change includes both global warming driven by human emissions of greenhouse gases , and the resulting large-scale shifts in weather patterns. Though there have been previous periods of climatic change , since the midth century, humans have had unprecedented impact on Earth's climate system and caused change on a global scale. Temperature rise on land is about twice the global average increase, leading to desert expansion and more common heat waves and wildfires. The World Health Organization calls climate change the greatest threat to global health in the 21st century. Heat wave intensification.

What are the effects of climate change?

What is climate change? Is it the same as global warming? What are its main causes and consequences? Is it a lie? Find everything about climate change bel ow! Climate change is the global phenomenon of climate transformation characterized by the changes in the usual climate of the planet regarding temperature, precipitation, and wind that are especially caused by human activities.

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