Lecture3_EAS1600_Fall08

Lecture3_EAS1600_Fall08 - Lecture 3 EAS 1600 see Chapter 1...

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Lecture 3 - EAS 1600 8/22/08 see Chapter 1 in text Environmental and Global Change Natural and Anthropogenic/Slow and Rapid • Land Cover and Land Use • Biodiversity • Temperature • Greenhouse Gases • Population
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Assimilated Satellite Image of City Lights
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What do we mean by Land Cover and Land Use? 1. Land use is the way in which, and the purposes for which, human beings employ the land and its resources. Change = Anthropogenic 1. for example, farming, urban, lumber 2. A common change is the subdivision of farmland 2. Land cover describes the physical state of the land surface. Change = Natural or Anthropogenic 1. for example, cropland, mountains, or forests 2. Glaciers melting and leaving behind soil or rock is a change in land cover
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Natural Land Cover Change – slow process http://www.gcrio.org/ocp96/fig48.html
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Satellite Image Bolivian Tropical Forest 1975 and 2000 1975 2000 Example of rapid deforestation
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Loss of land cover since pre-agricultural period Breakdown By Vegetation Class Class Pre-agricultural area (square kilometers) Post-agricultrual area (square kilometers) Percentage converted to agriculture Forest 49,992,600 42,100,100 15.79 Woodland 12,334,000 10,440,000 15.36 Shrubland 13,163,700 12,143,000 7.75 Tundra 7,294,000 7,294,000 0.00 Grassland 34,150,500 27,197,650 20.36 Desert 15,910,000 15,580,000 2.07 Cultivation 18,090,050 Total ice-free land area 132,844,800 132,844,800 13.62 Reference: Mapping Human Impacts on the Global Biosphere, Imhoff, M.L., BioScience, Vol. 44 p. 598, 1994.
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Land Use Categorization – Urban and Rural Year
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This note was uploaded on 02/08/2011 for the course EAS 1600 taught by Professor Jimstjohn during the Fall '08 term at Georgia Tech.

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Lecture3_EAS1600_Fall08 - Lecture 3 EAS 1600 see Chapter 1...

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