Informative Speech

Name

Name Jasmin Linthicum

Professor: Perkins, Pamela

Found of Oral Communication

Date 10/22/2020

Climate change

Climate change is an alteration in the natural aspects of the climate system which keep on for a number of decades or even much longer mostly 30 years at most. These aspects include extremes, averages and variability. However, climate change can be a result of human causes such as adjustments in the constituents of the land use or the atmosphere, natural causes such as volcanoes eruptions, or internal changes in the climatic conditions, and lastly disturbance to the climate system.

Natural causes

Natural cycles can make the climate to vary between cooling and warming. There are also biological aspects that force the climate to change, called ‘forcing.’ Although these natural aspects make the climate to change, they are not the primary causes according to scientific knowledge. For instance, the Milankovitch cycles – As the Earth moves around the sun, the slant of its axis and its path change to some extent. These modifications impact the quantity of sunlight that reaches the Earth. All these results to Earth’s temperature change. (Resnik 2016)

Human causes

Human beings lead to a change in climate by allowing greenhouse gases like carbon dioxide into the atmosphere. Currently, the amount of carbon dioxide in the air has increased than ever in the last 800,00 decades. Human actions inspire climate change by increasing amount of carbon (iv) oxide and many other greenhouse gases present in the air, altering the amounts of aerosols sprays and modifying the reflectivity of Earth’s surface by altering earth surface. Besides the direct impact, the warming that comes from higher concentrations of long-lasting greenhouse gases can be augmented by other processes. (Manou and Mihr 2017) 

A disturbance to the climate system

A close relation exists amidst atmospheric water vapor, the number of prolonged greenhouse gases (mostly CO2) in the atmosphere, earth temperature and the extent of the polar ice sheets. If one of the above aspects is altered or disturbed, the other factors also respond through “feedback” developments which may intensify or dampen the initial disturbance state. The feedbacks take place on an extended series of time scales: like those influencing the atmosphere are rapid in nature (Hannah 2015). These traceable fluctuations interfere with the distribution of the solar energy (radiation) reaching the earth surface, thus causing variation in temperatures which in turn triggers changes in the carbon cycle and ice sheets among others; that constitute to the amplified changes in temperature response.

 

 

 

Works cited

Hannah, Lee. "The Climate System and Climate Change." Climate Change Biology, 2015, pp. 13-53.

Manou, Dimitra, and Anja Mihr. "Climate change, migration and human rights." Climate Change, Migration and Human Rights, 2017, pp. 2-8.

Resnik, David B. "Climate Change: Causes, Consequences, Policy, and Ethics." Bioethical Insights into Values and Policy, 2016, pp. 47-58.