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Drought
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What is Drought Drought is a normal, recurrent feature of climate Originates from precipitation deficiency over extended period of time, usually a season or more Considered relative to some long-term average Compare current situation to historical average, often a 30-year period of record. Threshold (e.g., 75% of average precipitation over a specified time period) usually established somewhat arbitrarily
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Droughts are major natural disasters Cause much loss of lives and can destroy economies
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Droughts cost money Impact government’s ability to function and provide services
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Graphs show developing countries suffer most
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Note projected drought areas Note areas that your group is responsible for.
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Projected Temp & Precip Trends in Africa Temperature projected to increase especially at about 20-30 N&S latitude Precipitation decrease in these areas IPCC
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Asia
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South America
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Southern Africa
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As of 2002, poor harvests 14 million people in need of food Caused by droughts and flood Civil strife, HIV/Aids problems Hard for countries to cope Climate change will increase drought/floods
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Low rainfall in Malawi, Zimbabwe, Zambia Crop failure up to 90% Maize prices up 400% More than 30% of people 15- 49 infected w/HIV/AIDS Civil war in Angola Land conflicts in Zimbabwe International issues, economic policies also impact food production IMF/WTO/World Bank forced policies on countries E.g. Malawi warned it was spending too much on food reserves
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Climate Change Impacts Rainfall more episodic Lead to more droughts 1/3 of national income in Africa from agriculture 70% of population are farmers 40% of all exports = agricultural products In sub-Saharan Africa, poor spend up to 70% of income on food up to 90% agriculture in Sub-Saharan Africa, is rain-fed, accounts for 70% of regional employment and 35% of gross national product. Climate change will worsen food supplies Temperatures may rise up to.5 o C per decade Central southern Africa will feel greatest rise Droughts will increase
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Mitigation & Adaptation Mitigation: actions that tackle the causes of climate E.g.. reducing greenhouse gas emissions. Adaptation: actions that minimize the consequences Both are linked How much adaptation depends on greenhouse gas emissions
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Adaptation—A case study NERICA—New type of rice Cross of African/Asian rice Early maturing, drought tolerant, pest resistant, thrives in saline soil Planted in Guinea, Uganda Reduced reliance on importing rice when droughts hit
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Yemen Agriculture is important resource Accounts for 58% of employment 96% of children in rural areas work in agriculture 60% of women in agriculture Depends on resources sensitive to climate change Wheat and potato important Wheat not too sensitive to climate change Climate varies from hyper-arid to sub-humid
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Yemen Water Scarce Annual decline in aquifers of 1-8 m Water pumped is 138% of annual renewable level Water reservoirs will dry up in 50 years Limited water is main problem for crop production
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Yemen Adaptation Awareness of crop sensitivity to climate change Improved irrigation techniques Improved water storages
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