An Inconvenient Truth: a focus on its portrayal of the hydrologic cycle
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An Inconvenient Truth (AIT) has earned Al Gore an Oscar and a share of the 2007 Nobel Peace Prize and has been widely acclaimed by the mass media. However, significant errors exist in the film, owing to alarmism and exaggeration. As this forum does not provide for a detailed examination of these errors, this paper will focus only on the portrayal of the hydrologic cycle by AIT—precipitation and floods, soil moisture and droughts, and storminess. AIT argues that precipitation and intense rainfalls, floods, droughts, and the total number, intensity, and duration of tropical cyclones have all increased due exclusively to anthropogenically-driven climate change; indeed, AIT paints a picture of near scientific certainty with an overwhelming bias toward catastrophe scenarios. A closer look at the science, however, reveals that the data do not support these claims and that the scientific community is divided as to what the impact of anthropogenic climate change on the hydrologic cycle will be. Thus, the film gives a false impression of both the current state of climate change and that ‘the science is settled’.
KeywordsAn Inconvenient Truth Climate change Droughts Floods Hydrologic cycle Precipitation Soil moisture
- David, L., Bender, L. & Burns, S. Z. (2006). An inconvenient truth. Paramount Classics DVD (American release).Google Scholar
- Gore, A. (2006). An inconvenient truth. New York: Melcher Media.Google Scholar
- Groisman, P. Y., Karl, T. R., Easterling, D. R., Knight, R. W., Jamason, P. F., Hennessy, K. J., Suppiah, R., Page, C. M., Wibig, J., Fortuniak, K., Razuvaev, V. N., Douglas, A., Forland, E., & Zhai, P.-M. (1999). Changes in the probability of heavy precipitation: Important indicators of climatic change. Climatic Change, 42, 243–283.CrossRefGoogle Scholar
- Klotzbach, P. J. (2006). Trends in global tropical cyclone activity over the past twenty years (1986–2005). Geophysical Research Letters, 33, L10805, doi: 10810.11029/12006GL025881.
- Legates, D. R. (2005). Precipitation and the ‘enhanced’ hydrologic cycle. In Michaels, P. J. (Ed.), Shattered consensus: The true state of global warming. Lanham: Rowan and Littlefield.Google Scholar
- Palmer, W. C. (1965). Meteorological drought. Research Paper No. 45. Washington, D.C.: U.S. Weather Bureau.Google Scholar
- Roberts, D. (2006). Al Revere: An interview with accidental movie star Al Gore. Grist, 9 May. http://www.grist.org/news/maindish/2006/05/09/roberts/
- Vecchi, G. A. & Soden, B. J. (2007). Increased tropical Atlantic wind shear in model projections of global warming. Geophysical Research Letters, 34, L08702, doi: 08710.01029/02006GL028905.
- Wang, C. & Lee, S.-K. (2008). Global warming and United States landfalling hurricanes. Geophysical Research Letters, 34, L02708, doi: 02710.01029/02007GL032396.
- World Meteorological Organization (2006). Statement on tropical cyclones and climate change. Retrieved January 30, 2008, from http://www.wmo.int/pages/prog/arep/wwrp/tmr.html.