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By Andrew Morris, Will Snider, and Dillon Stern

Melting Mountains Are retreating equatorial East African glaciers indicative of larger global warming trends? What are the effects of this retreat?. By Andrew Morris, Will Snider, and Dillon Stern. Introduction. Statement of Objectives Global warming? Long-term climate change? Methodology

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By Andrew Morris, Will Snider, and Dillon Stern

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  1. Melting MountainsAre retreating equatorial East African glaciers indicative of larger global warming trends?What are the effects of this retreat? By Andrew Morris, Will Snider, and Dillon Stern

  2. Introduction • Statement of Objectives • Global warming? Long-term climate change? • Methodology • Air temperature vs. precipitation

  3. Evidence • Maps of ice extent atop Kibo in 1912, 1953, 1976, 2000 • 12km2 --> 2.6km2 • 80% decrease Hasenrath et al, 1997

  4. Causes - Air Temperature • Using lake levels to rule out significance of precipitation

  5. Causes - Air Temperature (cont’d) • Ice core samples from Kilimanjaro • Dust levels proxy for precipitation • Historically, the glaciers survived a 300-year drought

  6. Causes - Precipitation • Precipitation is particularly important because snowfall governs energy exchanges on the flat, dark volcanic sand adjacent to the vertical ice walls (Hardy, 2007). These vertical walls accounts for much of the continuous decrease in areal extent of the glaciers • A minimum monthly snowfall of ~10cm is needed to prevent glacial melting Hardy, 2007

  7. Impact • Water • No significant effect on water supply • Tourism?

  8. Conclusion • No clear evidence that East African glacial recession is evidence of global warming • Future research

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