The Impact of Global Climate Change on Agriculture

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The Impact of Global Climate Change on Agriculture
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Drought
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Precipitation and Vulnerability

• Overall predictability of weather would decrease
• Precipitation would decline in southern Africa
  and northern Latin America
• Less rainfall in the main growing season
• Vulnerability of the landless and poor will
  increase

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Vulnerability
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Climate Change and Resource Impact

• Higher temperatures
• Increased radiation
• Increased Respiration
• Reduced biomass production
• Lower soil moisture
• Increased evapotranspiration

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Drier summers in Caribbeanand Central America

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Climate Change and Yields

• Climate models show increased variability in
  precipitation results in decline in cereal yields
  especially in areas where precipitation is
  already marginal
• Unmitigated climate change will result in
  declines in yields in low-latitude regions

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Climate Change and Food Security

• Developing countries are projected to require net
  import of cereals to increase
• Reduction in cereal production of 10 in
  developing countries
• A reduction of 2-3 in Africa will put 10 million
  people at risk
• Number of people at risk of hunger grows by
  10-60 or 60-350 million people

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Food Security at Risk
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Climate Change and Insects

• Increases will occur in incidence of insect
  attacks on crops
• Number of vector-borne diseases affecting humans
  will increase

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Climate Change and Sea Level

• Sea level will rise affecting coastal areas and
  especially island nations
• Freshwater resources will be threatened
• One-half meter rise expected over next century
• Increased intensity and frequency of hurricanes
  and tropical storms

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Coastal Threat
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Sea Level Rise
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Recommendations

• Prevent global average temperature from rising
  more than two degrees C.
• Reduce the emission of greenhouse gases by use of
  non-carbon fuel sources in the industrialized
  world
• Invest in research of energy efficient and low
  and zero-carbon technologies
• Adopt sustainable agriculture practices

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