View
1.822
Download
2
Embed Size (px)
DESCRIPTION
Citation preview
Eco-Efficient Agriculture for the Poor
Potential Impact of Climate Change on Land Use in the Lao PDR
Mike Salazar, Laura Collet & Rod Lefroy
A short study implemented by the
International Center for Tropical Agriculture (Centro Internacional de Agricultura Tropical – CIAT)
Eco-Efficient Agriculture for the Poor
Components of the Report
1. Climate Change
2. Impacts
3. Land Use Change
4. Impacts in the context of current land use
Eco-Efficient Agriculture for the Poor
Climate Change
Eco-Efficient Agriculture for the Poor
Climate VariablesChange from 1901 until 2002 in:
1) Annual Min. Temperature
2) Annual Mean Temperature
3) Annual Max. Temperature
4) Annual Precipitation
5) April Precipitation
6) May Precipitation
7) October Precipitation
Eco-Efficient Agriculture for the Poor
Results 1901 – 2002: Annual Mean Temp. 2
• Variable countrywide increase• Most of north & central areas: 0.1 to 0.5ºC/100 yr• Southern parts: 0.5 to 1.0ºC/100 yr
Eco-Efficient Agriculture for the Poor
Results 2020 & 2050: Annual Mean Temp. 2
Mean Temperature - Scenario A1b
5
10
15
20
25
30
35
1900 1920 1940 1960 1980 2000 2020 2040 2060
Eco-Efficient Agriculture for the Poor
Results 2020 & 2050: Annual Mean Temp. 2
Example: Sayabouri Annual Mean Temperature 1982 – 2002: 23.7 °C Modeled 2020: 24.4 °C Modeled 2050: 25.7 °C
Eco-Efficient Agriculture for the Poor
Climate Change in Laos:
During the 20th Century:
Based on analysis of the CRU dataset (and supported by local data and anecdotal evidence from villagers):
• TemperatureSignificant increase in annual minimum, mean, & maximum temperatures throughout the country, but particularly in the south
• RainfallSignificant trends in rainfall (some areas increasing, others decreasing), but not large compared to the inter-annual variations
Eco-Efficient Agriculture for the Poor
Climate Change in Laos:
During the 21st Century:
Based on the IPCC A1b scenario and the mean of 7 Global Circulation models (GCMs):
• TemperaturePredict significant increase in annual minimum, mean, & maximum temperatures throughout the country, but particularly in the south
• RainfallPredict significant and variable changes in rainfall (some areas increasing, others decreasing), but changes still small compared to the current variability in rainfall
Eco-Efficient Agriculture for the Poor
Impacts
Eco-Efficient Agriculture for the Poor
Sugarcane: Current & Future Suitability
Eco-Efficient Agriculture for the Poor
Arabica coffee: Current & Future Suitability
Eco-Efficient Agriculture for the Poor
Land Use Change
Eco-Efficient Agriculture for the Poor
Assessing Land Use & Land Use Change
Land Use Statistics
• FAO statistics (1961 – 2007) (crops, timber, land-use)• MAF crop statistics for the Province (District) (1976-2008)
Land Use Change Analysis
• MODIS 10-day 250 m NDVI (Normalised Difference Vegetation Index) product for 2000-2009
• Compared 22 March 2000 with 22 March 2009• Analysis of vegetation cover (NDVI)• Detection of vegetation change
Eco-Efficient Agriculture for the Poor
Detecting Land Use Change – Results
2000 2009Bare Land: < 0.5
Dense Vegetation: > 0.75
Eco-Efficient Agriculture for the Poor
Detecting Land Use Change – Results Example of Sayabouri Province
2000 2009Maiz
Eco-Efficient Agriculture for the Poor
Detecting Land Use Change – Results
Main Decrease: -150 - -7Main Increase: 20 - 100
Mean: -2.32
Eco-Efficient Agriculture for the Poor
Fire Patterns
Spatial distribution of fire mapped over an elevation gradient by the years 2002, 2003, 2004, 2005, 2006 & 2007, 2008 and 2009 in Xieng Ngeung and Botene districts
Eco-Efficient Agriculture for the Poor
Spatial pattern of vegetation activityGeographical distribution of 5 clusters classified in a time series (8-years) and labeled to land coverage in Geographical distribution of 5 clusters classified in a time series (8-years) and labeled to land coverage in BoteneBotene
Eco-Efficient Agriculture for the Poor
Spatial pattern of vegetation activityGeographical distribution of 5 clusters classified in a time series (8-years) and labeled to land coverage in Geographical distribution of 5 clusters classified in a time series (8-years) and labeled to land coverage in Xieng NgeunXieng Ngeun
Eco-Efficient Agriculture for the Poor
Conclusion and Recommendations
• The resilience and sustainability of many farming systems is very low
• More integrated crop and livestock systems, with a much higher degree of resource management, are needed
• Such systems changes, while reducing risk and introducing greater resilience for the current situation will also prepare for the hotter and more water-challenged future predicted with climate change
Eco-Efficient Agriculture for the Poor
Thank you