The past – impact of volcanic explosions on climate
Ice ages and hot periods – why
The milankovitch cycles are the frequent and regular changes in the way the earth orbits the sun, meaning that there are consistent sequences of ice ages and warm periods. Its orbit moves from being a circular movement around the sun to a slightly elliptical rotation path. The angle of the Earth’s axis also changes fractionally, occurring every forty-one thousand years. Finally, the direction of the tilt of the axis moves towards or away from the sun every twenty-six thousand years. These changes influence the length of the seasons and the amount of solar radiation received by the earth.
One possible explanation of this effect is the amount of land mass which is pointed towards the sun. In the Northern hemisphere, there is a significantly larger amount of land, and therefore vegetation. As this section of the Earth points in the direction of the sun and therefore receives more solar radiation, this vegetation absorbs more CO2; reducing the amount in the atmosphere. This results in the lowering of average temperatures.
When the opposite occurs plants release CO2, meaning average temperatures increase. This results in the rising temperature of the ocean, which leads to more frequent and severe storms – for example, hurricane Katrina was heated and fuelled by the hot, moist air in the Gulf of Mexico. The heating of the oceans also leads to ice caps/glaciers melting. Evidence of this occurs in Antarctica, where a huge section melted in just thirty-five days. The ice once served as a reflective surface; reflecting the sun’s solar waves back into the atmosphere (albedo effect). Now, however, as the ice is no longer there, the ocean absorbs these rays and heating the surrounding water.
Evaporation also dramatically increases, leading to heavier rainfall and flooding in certain areas. Evaporation also increases in dry areas, where soil moisture is removed. This leaves these particular areas, such as Northern Africa, in draught. This in turn leads to lack of resources and food for indigenous people, causing other human problems.
Another reason for the increasing temperatures is the greenhouse effect. As solar waves from the sun beat down to the Earth’s surface, some are reflected back into the atmosphere as infrared radiation. Here, however, greenhouse gases such as CO2 and water vapour trap these rays, causing the layer around the Earth to gradually heat.
Many people believe that human impacts are making this situation worse. The continuing burning of non-renewable sources such as fossil fuels to provide energy for dense populations increases the amount of CO2. This is also a result of deforestation as the burning of trees and plantations also causes the release of CO2.
Impacts on the UK and the whole globe have been predicted
Predicted impacts on climate change – UK and globally / already – loss of species / mosquitioes move to higher altitudes = increase diseases
Kyoto agreement
Conclusions – were USA right not to sign the Kyoto agreement? Why?
Some predicted Future Effects of Climate Change
Increased
impacts Main article: Economic impacts of climate change Aggregating impacts adds up the total impact of climate change across sectors and/or regions.[126] Examples of aggregate measures include economic cost (e.g., changes in gross domestic product (GDP) and the social cost of carbon), changes in ecosystems (e.g., changes over land area from one type of vegetation to another),[127] human health impacts, and the number of people affected by climate change.[128] Aggregate measures such as economic…
Natalie Sesco English 1 Uri Hertz May 17, 2012 Environmental Issues Everyone talks about climate change and how the Earth is slowly deteriorating, but no one seems to have specific examples. In Linnea Saukko’s “How to Poison the Earth,” she does use specific examples of what is causing climate change. She uses satire with a hint of sarcasm in her essay. She gives the reader specific examples of how to poison the Earth, but not really wanting to poison the Earth…
Developing countries contribute less to climate change than developed countries and should, therefore, take less responsibility for dealing with it. To what extent do you agree with this statement? Climate change is an important issue, which affects all people around the world to a greater or lesser extent. The significance of this problem is that the effect might be tremendous in its scale and totally unpredictable. According to IPPC (2001), environmental changes accelerate the appearance of melting…
Climate Change: There are a number of global problems happening for example terrorism, spread of infectious diseases, poverty, economic crisis, proliferation of nuclear weapons, and increase in armed conflict but none of these problems is much bigger than climate change. I have a strong conviction that Climate Change is a major global problem that possesses the greatest threat to human existence on earth and thus we need to pay a lot attention to this climate change in every part of the world because…
Climate Change Issues Climate change is an issue that will affect every part of the planet, every area will be affected in some way. The earth runs in a cycle what happens at one end will eventually affect another. In recent decades glaciers have shrunk, ice on rivers and lakes is breaking up earlier, plants and animal ranges have shifted and trees are flowering sooner. The natural equilibrium of nature is changing; it has taken millions of years of evolution for planet earth to reach the inhabitable…
I am really interested on the topic of climate change, so I found listening to Emily speak about this topic through advocacy very beneficial. What I found specifically beneficial was that she actually went through the process of ways to truly make a difference, where most speakers tend to just provide information about the issue. There are three ways that she went through to help reduce the effects of greenhouse gases and decrease the rate of increasing global temperatures, which were through individual…
climate change is an issue that is affecting people all over the world. Climate change From Wikipedia, the free encyclopedia For current and future climatological effects of human influences, see global warming. For the study of past climate change, see paleoclimatology. For temperatures on the longest time scales, see geologic temperature record. Page semi-protected Atmospheric sciences ShipTracks MODIS 2005may11.jpg Atmospheric physics Atmospheric dynamics (category) Atmospheric chemistry…
The Climate Change Debate 1. Article Review – ‘Perception of Climate Change’ by Hansen et al. This article investigates the phenomena climate change and its aim is to use statistical data to support that climate change is real. An aspect of climate change named as ‘climate dice’ is mentioned in the article which referred to the chance of extreme weathers such as unusually cool or warm seasons. In the past three decades, there has been evidence of increasing climate dice ‘loading’ occurring…
“We have to face the reality of climate change. It is arguably the biggest threat we are facing today.” (William Hague). Climate change is the change in the patterns of the global climate, caused by the increase levels of carbon dioxide that are produced. The tropical forests that are being destroyed and the fossil fuels that are used every day are two of the causes of the large quantities of carbon dioxide that are released into the atmosphere. Climate change is an issue that affects us all and…
Environmental Changes have become one of the major threats to the world in the last decade. Climate change, for instance, does not only impact a single state at a domestic level, but it also influences nations’ well-beings at an international level. Therefore, it is significant for scholars, and politicians to have a valid understanding of the relationship between human and nature, since humans are one of the influencing variables that cause environmental changes. Many studies have been done to explain…