GeoJournal

, Volume 70, Issue 1, pp 15–19 | Cite as

An Inconvenient Truth: a focus on its portrayal of the hydrologic cycle

Article

Abstract

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’.

Keywords

An Inconvenient Truth Climate change Droughts Floods Hydrologic cycle Precipitation Soil moisture 

References

  1. Beighley, R. E., Melack, J. M., & Dunne, T. (2003). Impacts of California’s climatic regimes and coastal land use change on streamflow characteristics. Journal of the American Water Resources Association, 39, 1419–1433.CrossRefGoogle Scholar
  2. Dai, A., Trenberth, K. E., & Karl, T. R. (1998). Global variations in droughts and wet spells: 1900–1995. Geophysical Research Letters, 25, 3367–3370.CrossRefGoogle Scholar
  3. Dai, A., Trenberth, K., & Qian, T. (2004). A global dataset of Palmer Drought Severity Index for 1870–2002: Relationship with soil moisture and effects of surface warming. Journal of Hydrometeorology, 5, 1117–1130.CrossRefGoogle Scholar
  4. David, L., Bender, L. & Burns, S. Z. (2006). An inconvenient truth. Paramount Classics DVD (American release).Google Scholar
  5. Feddema, J. J., Oleson, K. W., Bonan, G. B., Mearns, L. O., Buja, L. E., Meehl, G. A., & Washington, W. M. (2005). The importance of land-cover change in simulating future climates. Science, 310, 1674–1678.CrossRefGoogle Scholar
  6. Gore, A. (2006). An inconvenient truth. New York: Melcher Media.Google Scholar
  7. 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
  8. Groisman, P. Y., Knight, R. W., & Karl, T. R. (2001). Heavy precipitation and high stream flow in the contiguous United States: Trends in the twentieth century. Bulletin of the American Meteorological Society, 82, 219–246.CrossRefGoogle Scholar
  9. Guttman, N. B. (1998). Comparing the Palmer Drought Index and the Standardized Precipitation Index. Journal of the American Water Resources Association, 34, 113–121.CrossRefGoogle Scholar
  10. Hayden, B. P. (1999). Climate change and extratropical storminess in the United States: An assessment. Journal of the American Water Resources Association, 35, 1387–1398.CrossRefGoogle Scholar
  11. Hayes, M. J., Svoboda, M. D., Wilhite, D. A., & Vanyarkho, O. V. (1999). Monitoring the 1996 drought using the Standardized Precipitation Index. Bulletin of the American Meteorological Society, 80, 429–438.CrossRefGoogle Scholar
  12. 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.
  13. 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
  14. Lins, H. F., & Slack, J. R. (1999). Streamflow trends in the United States. Geophysical Research Letters, 26, 227–230.CrossRefGoogle Scholar
  15. New, M., Todd, M., Hulme, M., & Jones, P. (2001). Precipitation measurements and trends in the twentieth century. International Journal of Climatology, 21, 1899–1922.CrossRefGoogle Scholar
  16. Palmer, W. C. (1965). Meteorological drought. Research Paper No. 45. Washington, D.C.: U.S. Weather Bureau.Google Scholar
  17. 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/
  18. Sinclair, M. R., & Watterson, I. G. (1999). Objective assessment of extratropical weather systems in simulated climates. Journal of Climate, 12, 3467–3485.CrossRefGoogle Scholar
  19. 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.
  20. Wang, C. & Lee, S.-K. (2008). Global warming and United States landfalling hurricanes. Geophysical Research Letters, 34, L02708, doi:02710.01029/02007GL032396.
  21. Woodhouse, C. A., & Overpeck, J. T. (1998). 2000 years of drought variability in the central United States. Bulletin of the American Meteorological Society, 79, 2693–2714.CrossRefGoogle Scholar
  22. 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.

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.University of DelawareNewarkUSA

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