4 Task 2 20 marks Three claims have been made about how our climate has changed

Question

4 Task 2 20 marks Three claims have been made about how our climate has changed or is changing. However, not all of these claims are necessarily supported by climate data. The ultimate aim of this task is for you to analyse the data provided and use this analysis to inform your argument in relation to the three climate change claims Part A of the task will assist you to identify and organise the information needed for your response to Part B of the task. Claims Claim 1: There has been no global warming in the period following the industrial revolution. Since the industrial revolution, the main cause of global warming has been natural changes in the amount of solar irradiance from solar flares. Claim 2: Claim 3: Since the industrial revolution, the main cause of global warming has been an increase in atmospheric greenhouse gases (especially carbon dioxide). Word limit 300 words No referencing required (10 Marks) You are provided with 6 graphs. For each graph, decide whether it: Supports one or more claim(s) . Helps to reject one or more claim(s) Provides no useful information in regard to a claim or claims. To show your understanding, and provide reasons for your decisions, you will need to complete the Graph Analysis Table on page 2. Two examples of possible table answers are shown below Example table answers. Note that every section of the table needs a comment. Example This graph clearly This graph does not help This graph showsonly and showsme to reject any of the provides no useful information onand and so supports Claim claims. thus no information on Claims 2 and 3. Example This graph This graph, showingThis graph shows and supports Claiml ashelps me to provides no useful information on Claims 2. it clearly showsreject Claim 3.

Explanation / Answer

1. This graph clearly shows that the, atmospheric samples contained in ice cores and more recent direct measurements, provides evidence that atmospheric CO2 has increased since the Industrial Revolution. So, it supports claim. 2.this graph does not help me to reject claim it is because global warming doesn’t mean temperatures rose everywhere at every time by one degree. Temperatures in a given year or decade might rise 5 degrees in one region and drop 2 degrees in another. Exceptionally cold winters in one region might be followed by exceptionally warm summers. Or a cold winter in one area might be balanced by an extremely warm winter in another part of the globe. 3.this Graph clearly shows the predicted increase in Earth's average surface temperature according to a series of climate change scenarios that assume different levels of economic development, population growth, and fossil fuel use. The assumptions made by each scenario are given at the bottom of the graph.it does not provide useful information . 4.This graph clearly show that it indicate that Earth’s climate has changed over almost every conceivable timescale since the beginning of geologic time and that the influence of human activities since at least the beginning of the Industrial Revolution has been deeply woven into the very fabric of climate change. 5 .Modern global warming is the result of an increase in magnitude of the so-called greenhouse effect, a warming of Earth’s surface and lower atmosphere caused by the presence of water vapour, carbon dioxide, methane, nitrous oxides, and other greenhouse gases.it help me to claim 3 6.The predicted rise in temperature was based on a range of possible scenarios that accounted for future greenhouse gas emissions and mitigation (severity reduction) measures and on uncertainties in the model projections

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