climate-2-form - GLY2030 Recitation Activity on Climate...

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GLY2030 Recitation Activity on Climate Change, #2 Click and enter name here This recitation activity will give you an opportunity to explore real data—the real observations that are the basis of the claim that the Earth is presently warming, and that the concentration of greenhouse gases is increasing at an unprecedented rate. You will be visiting several websites that house these data, so make sure you’re sitting in front of a computer with a relatively fast Internet connection before you begin. First, print out this handout and keep it by your side while you follow the instructions and navigate the different websites. You will be answering several questions and recording some data values. 1. Browse to the website Climate Explorer ( [email protected] ). This is a major repository of climate data, with an emphasis on El Nino- Southern Oscillation data. On the right-hand side you will see a list of datasets available. Under Select a time series select Monthly climate indices . A climate index is some kind of climate variable that changes over the years, like precipitation, average temperature, etc. The “monthly” part means that the data is retrieved every month. The new window that appears contains a table of all the datasets available. If you scroll down you will see several choices of datasets under the heading Global temperature . Clicking on any link will pull up a graph. a. For the category Global temperature there are many choices. Pick any one of the five global average temperature datasets and click on it. Examine the graph. Based on the graph: i. What do think about the reality of global warming? Do the data support the hypothesis that the planet is getting warmer? Click here to enter text. ii. If it is getting warmer, by how much has it warmed, on average, since 1900? Click here to enter text. b. Go back to the table of monthly time series datasets. For the category Radiation there is only one dataset— Mauna Loa CO 2 concentrations . Click on it. i. How many years of CO 2 data are there? Click here to enter text. ii. Do these data support the hypothesis that CO 2 concentrations have been increasing? Click here to enter text. iii. The pre-industrial level of CO 2 is thought to be 282 ppm, based on analysis of air trapped in ice cores. How much higher is the present level of CO 2 concentration in the atmosphere? Click here to enter text.
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This note was uploaded on 07/31/2011 for the course GLY 2030 taught by Professor Kruse,s during the Fall '08 term at University of South Florida.

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climate-2-form - GLY2030 Recitation Activity on Climate...

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