Causes of Climate Change + Impacts of Climate Change by Yvonne Tan

Name: Ms Tan

vontan — 2018-04-23 05:01:16 UTC

Deforestation can lead to global warming. With deforestation, there will be fewer trees and other plants to absorb billions of tonnes of carbon dioxide yearly, leading to an increase in carbon dioxide in the atmosphere. Carbon dioxide is also released during the process of deforestation and land clearance. Moreover soil contains one of the largest sources of carbon in the world. Deforestation exposes soil to sunlight, which increases soil temperature and the rate of carbon oxidation, where carbon in the soil reacts with oxygen in the atmosphere to produce carbon dioxide. Thus, deforestation will increase the amount of carbon dioxide in the atmosphere. This greenhouse gas will trap more heat in the atmosphere, hence resulting in global warming.

Brigette & Aini

2018-04-23 05:32:37 UTC

Volcanic eruptions results in a cooling influence on regional and global temperatures. When volcano erupt,large volumes of carbon dioxide,water vapour,sulfur dioxide,dust and ash are released into the atmosphere. Sulfur dioxide reacts with the water to form sulphur-based particles in the atmosphere and combines together with dust and ash,these particles reflect solar energy back into space. The eruption of Mount Pinatubo in the Philippines is an example of the cooling influence in 1991. The eruption released 17 million tonnes of sulfur dioxide into the atmosphere forming sulfur-based particles that spread around the earth 2 weeks. It reflects solar energy back into spaces which lowered temperatures in the northern hemisphere by as much as 0.6 degree celcius. The temporary lowering of global temperatures lasted for two years in some locations. However, volcanic eruptions only have few Long-term effects on the earths climate as temporary global cooling influence will cease once the volcanic dust and ash settle. Hencevolcanic eruptions only cause global cooling for a short period of time

Zeying & Vivien

2018-04-23 05:33:31 UTC

Rise in sea level is due to increase in green house gases which leads to global warming. Higher temperatures cause the melting of glaciers in Greenland and Antartica. The resultant meltwater causes a rise in sea levels. Higher temperatures also cause water to expand which results in a rise in sea levels. Rising sea levels have a negative impact on places where humans live. Over 600 million people worldwide live in areas less than 10 metres above sea level. Rising sea levels threaten low-lying areas and islands. For example, Majuro Atoll in the Pacific Ocean will lose 80 percent of its land if the sea level rises by half a metre.
Two-thirds of the world’s largest cities located in the coastal areas are also at risk due to rising sea levels. According to the Intergovernmental Panel on Climate Change (IPCC), 33 percent of coastal land and wetland habitats are likely to be lost in the next hundred years if sea levels continue to rise at the current rates.

Chian Ying and Madelyn

2018-04-23 05:35:09 UTC

Sea level rise. Sea levels have changed over millions of years due to natural climate changes. However, there has been a steady increase in sea levels recorded since the late 1800s until today

rachel and tiffanni

2018-04-23 05:37:05 UTC

argriculture will cause climate change as tractors run on fossil fuel which release carbon dioxide, and the use of inorganic fertiliser increases the amount of nitrous oxide is released when soil is ploughed or when rain flows through the soil. another cause is cattle farming, this contributes to greenhouse gas emission because cattle release methane as a waste of gas. millions of tonnes of methane are released from every year from cattle farming. due to the difficulty of derterminning the actual amount of methane produced by cattle farming. for example scientists in argentina have conducted a study to determine the level of methane produced from cows. every cow produces between 1000 and 8000 litres of emission everyday, they also discovered that methane from cows accounts for more than 30% of the countries total greenhouse emissions. as the increase of the greenhouse gases it will cause global warming

jan & chienhwee

2018-04-23 05:41:20 UTC

when a valcano erupts, large volumes of carbon dioxide, water vapour, sulfur dioxide, dust and ash are released into the atmostphere. sulfur dioxide reacts with water to form sulphur-based particles in the atmosphere. together with dur and ash, these particles reflect solar energy back into space. this results in a cooling influence on regional and global temperatures. an example of the cooling influence is the eruption of Mount Pinatubo in the Philippines in 1991. the eruption released 17 million tonnes of sulfur dioxide into the atmosphere forming sulfer-based particles that spread around the earth in two weeks. the sulfur-based particles reflected solar energy back into space and lowered temperatures in the nothern hemisphere by as much as 0.6 degree celcius.

Gavin and Luke

2018-04-23 05:48:20 UTC

An extreme weather condition/event is a severe and rare weather phenomenon that results in significant economic loss and the loss of lives. One type of extreme weather event is heat wave. Although they are neither visibly destructive nor violent, heat waves are “silent killers” which can 🤬 many people. In Aug 2003, Europe experienced a heat wave which killed more than 70,000 people.

When people are subject to extreme heat, the vital organs are at risk and death results when the body cannot cool itself down sufficiently. Young children and elderly are especially vulnerable to heat exhaustion and other heat-related illnesses.

The occurrence of extreme weather events had increased in the last few decades. Extreme weather events are believed to be increasing due to higher land and sea surface temperatures. Higher temperatures have resulted in greater amounts of water vapour and latent heat in a warmer atmosphere. Such an atmosphere serves as a powerful driving force for extreme weather events.

Ms Tan

vontan — 2018-04-23 05:51:56 UTC

Higher temperatures from global warming may result in longer growing season in some regions. As different crops require different growth periods, the lengthening growing season may be advantageous or disadvantageous to crops growth. For example, with the increase in growing season, Canada will benefit from the projected increase in production of fruit, soya beans and potatoes this will increase food supply within Canada. However, this increase in temperatures has also resulted in the average wheat grain yield in Canada to reduce, thus reduce the staple food supply in the country. Increase in temperatures is not beneficial to Yunnan province in China as the production of fruits such as apples and cherries, and nuts such as almonds and walnuts require cool weather conditions.

Nicole, Javier, Cody, Dylan

vontan — 2018-04-23 07:19:38 UTC

Climate change could lead to increased temperature and rainfall in various parts of the world resulting to spreading of infectious insect-borne diseases , which are diseases transmitted to humans/animals by insects.
For example, heavy rainfall may allow mosquitoes to grow in numbers in aquatic habitats resulting in the spread of dengue fever. Dengue fever is caused by a virus transmitted to humans by the bite of an infected mosquitoe. It includes symptoms such as fever, headaches or severe bleeding. Regions with moderate temperarures such as Europe and North America, are facing diseases once confined to the tropics. For example, dengue fever was reported in the cool climate areas of Nepal and Bhutan for the first time in 2004.

Cody, Nicole, Dylan, Javier

vontan — 2018-04-23 09:04:27 UTC

Sun emits varying amounts of solar radiation due to changes in magnetic field.
• Sunspots are cooler regions on the sun’s surface that appear as dark spots.
• During periods of intense solar magnetic activity, the number of sunspots increases, resulting in higher solar radiation.
• This is because the areas surrounding the sunspots radiate more energy.
• That compensates for the lower temperatures of the sunspot areas.
• The number of sunspots rises and falls with an approximate 11 year cycle.
• This cycle is associated with the earth’s cycle of high and low global temperatures.
• When the number of sunspots reached its minimum in the time period, global temperatures then were also lower than global temperatures in the past 20 years