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Cutting Edge > Hurricanes-Climate Change Connection > Classroom Activities > Exploring the Link between Hurricanes and Climate using GCM Results

Exploring the Link Between Hurricanes and Climate Using GCM Results

Cindy Shellito
,
University of Northern Colorado
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This activity has benefited from input from faculty educators beyond the author through a review and suggestion process.

This review took place as a part of a faculty professional development workshop where groups of faculty reviewed each others' activities and offered feedback and ideas for improvements. To learn more about the process On the Cutting Edge uses for activity review, see http://serc.carleton.edu/NAGTWorkshops/review.html.

This activity has been selected for inclusion in the CLEAN collection.

This activity has been extensively reviewed for inclusion in the Climate Literacy and Energy Awareness Network's collection of educational resources. For information the process and the collection, see http://cleanet.org/clean/about/selected_by_CLEAN.



This page first made public: Oct 24, 2008

Summary

This activity requires students to examine global climate model output available online and consider the potential impact of global warming on tropical cyclone initiation and evolution. As a follow-up, students read two short articles on the connection between hurricanes and global warming and discuss these articles in context of what they have learned from model output.

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Context

Audience

This activity is designed for an upper-division Physical Climatology course for Meteorology majors (~15-20 students). This could also be used in a Global Change or Environmental changes course for science majors. Aspects of this activity could be tailored for students at a more introductory level, although lower level students will require significant guidance in analysis of climate model results.

Skills and concepts that students must have mastered

Students should have a basic understanding of factors involved in hurricane growth and evolution, as well as an understanding of the factors that affect climate change. Students should also be somewhat familiar with climate models (in terms of their utility, and what types of information they provide).

How the activity is situated in the course

This activity is introduced as a stand-alone exercise near the end of the semester, after we have covered extensively radiative transfer, the hydrologic cycle and global oceanic and atmospheric circulation. Students have been reading journal articles on various topics throughout the semester for homework and class discussion, so they are familiar with the scientific journal article format.

Goals

Content/concepts goals for this activity

Understand which aspects of changing climate will impact hurricanes (SSTs, lapse rate, upper level winds)
Consider the impact of climate change on hurricanes
Understand how scientists go about examining trends in tropical cyclone activity

Higher order thinking skills goals for this activity

Examine climate model output from the NCAR Community Climate System Model (available online)
Develop a hypothesis regarding the effect of climate change on hurricanes
Synthesize ideas about hurricanes and climate as presented in a journal article

Other skills goals for this activity

Provide an oral summary of individual group analysis for the rest of the class
Develop a short written and oral summary of a journal article
Formulate questions/hypothesis about the relationship between hurricanes and climate change in the future

Description of the activity/assignment

This is a two part activity, requiring two to three 50-minute class periods. During the first class period, students review the factors affecting tropical cyclone initiation and evolution (role of sea surface temperatures, etc), then examine output from NCAR's Community Climate System Model experiment which tested model climate sensitivity to 4x 1990 atmospheric CO2 levels. In groups, students compare the 4xCO2 experiment with a 1990 Control experiment in terms of surface temperature, upper level winds, and lapse rate in hurricane-prone regions. Each group considers whether tropical cyclones would be more likely to develop in the 4xCO2 experiment, then provides a brief oral report to the class on the result of their discussion. For homework, students read two short journal articles examining the connection between hurricanes and climate change. In preparation for discussion on these articles, students create a brief written summary of the main points in each article and a list of discussion questions. Class discussion is driven by students' written summaries and questions. Students consider the hypotheses developed in the previous class regarding hurricanes in a warmer world in context of what they have read in the articles.

Determining whether students have met the goals

A student who is successful with this assignment will demonstrate the following:

More information about assessment tools and techniques.

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Other Materials

Supporting references/URLs

The NCAR Community Climate System Model: http://www.ccsm.ucar.edu/

Emanuel, K., 2005. Increasing destructiveness of tropical cyclones over the past 30 years. Science, 436, p. 686-688.

Webster, P.J., et al., 2005. Changes in tropical cyclone number, duration, and intensity in a warming environment. Science, 309, 1844-1846.

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