PASTORAL LAND MANAGEMENT OPTIONS IN THE SAHEL: THE CONSEQUENT CLIMATE FORCINGS

ZIPPORAH MUSYIMI
SUPERVISION BY
Prof. Dr. ...
OUTLINE
 INTRODUCTION
•BACKGROUND
•HYPOTHESIS
•REASERCH QUESTIONS
•OBJECTIVES

 METTHODOLOGY
•DESCIPTION OF THE STUDY SI...
Introduction –Background
Pastoral sytems in African drylands

Pastoral sytems Future resilience –Uncertain due to climate
...
Introduction –Aim, Hypothesis, Research questions
Aim: Develop a framework for assessment of the climatic forcing conseque...
Objectives
1.Assess the impact of land management options on the geochemical climate Forcing
(carbon sequestration) (RQ1)
...
Methods: Description of the study area
Methods: Description of the study site
Laba

Tiogo
Methods: Description of Land management options
Methods: Description of the experimental design
Grazing

Fire

Selective cutting

Grazing

No Fire

No Cutting
Selective c...
Methods: Description of the study area- experimental layout- Tiogo and Laba
Methods: Description of the Remote sensing data
Characteristics

Data sets
Albedo and above ground
carbon estimation

Land...
Methods: Estimation of above ground Carbon – Objective 1
Above Ground carbon
estimation (Field data)

Image Processing

•C...
Methods: Radiative Forcings of carbon storage (based on Kirschbaum et al 2011)
•The change in Radiative Forcing for a squa...
Methods: Radiative Forcings of carbon storage (based on Kirschbaum et al 2011)
Considering that 1 ppm in carbon dioxide co...
Methods:

Estimation of surface albedo– Objective 2

Image-Rainy season
Image Processing
•Atmospheric corrections

Ready i...
Methods: Radiative Forcings of Surface Albedo (based on Kirschbaum et al 2011)
The change in Radiative Forcing due to chan...
Methods: Land cover /Use changes and impact on soil carbon-Objective 4
THANK YOU
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Pastoral Land Management Options in the Sahel: The Consequent Climate Forcings

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Presentation of Zipporah Musyimi at 2013 workshop of the Climate Food and Farming Network: http://ccafs.cgiar.org/climate-food-and-farming-network

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Pastoral Land Management Options in the Sahel: The Consequent Climate Forcings

  1. 1. PASTORAL LAND MANAGEMENT OPTIONS IN THE SAHEL: THE CONSEQUENT CLIMATE FORCINGS ZIPPORAH MUSYIMI SUPERVISION BY Prof. Dr. T. Uddelhoven (University Trier) Dr. L. Zida (INERA) Dr. J. de Leeuw (ILRI)
  2. 2. OUTLINE  INTRODUCTION •BACKGROUND •HYPOTHESIS •REASERCH QUESTIONS •OBJECTIVES  METTHODOLOGY •DESCIPTION OF THE STUDY SITE •DESCRIPTION OF THE METHODS
  3. 3. Introduction –Background Pastoral sytems in African drylands Pastoral sytems Future resilience –Uncertain due to climate change effects Way foward – Livelihood diverification options --Mitigation options CARBON CREDITS ????- Managing land for carbon credits (Geochemical) may upset the cooling effects due to warming due to changes in physical land characteristics of land surface (Geophysical) Study Relevance – Could the pastorlists benefit from Payment of Environmental Sercives (PAYES) opting for management which mitigate climate?
  4. 4. Introduction –Aim, Hypothesis, Research questions Aim: Develop a framework for assessment of the climatic forcing consequent of different land management by integrating two lines of evidence: Geophysical and Geochemical Hypothesis Hypothesis 1 : Land management have significant impacts on both the geochemical and geophysical climate Forcing Hypothesis 2: Land cover changes influence the both below ground carbon storage and the surface albedo Research questions • What are the impacts of land management on Above ground carbon stock ? •What impact do land management options have on surface albedo? •What is the net Radiative forcing of pastoral land management options considering both the geochemical and geophysical factors? •What are the land dynamics with within 20 years and their implications on SC and Albedo
  5. 5. Objectives 1.Assess the impact of land management options on the geochemical climate Forcing (carbon sequestration) (RQ1) 2.Assess the impact of pastoral land management options on the Geophysical forcing (Surface Albedo) –(RQ2) 3.Estimate the net climate forcing consequent from the land management options (Considering Geochemical and Geophyical Factors) (RQ3) 4.Assess land cover changes within 20 year time step and estimate the consequent climatic forcing considering both the biophysical and biochemical aspects (RQ4)
  6. 6. Methods: Description of the study area
  7. 7. Methods: Description of the study site Laba Tiogo
  8. 8. Methods: Description of Land management options
  9. 9. Methods: Description of the experimental design Grazing Fire Selective cutting Grazing No Fire No Cutting Selective cutting Number of plots of (50X50) 4 4 Annual early fire No Cutting Selective cutting 4 4 No Cutting Selective cutting 4 4 No fire No Cutting Selective cutting 4 4 Annual early fire No Cutting Selective cutting 4 4 No Grazing
  10. 10. Methods: Description of the study area- experimental layout- Tiogo and Laba
  11. 11. Methods: Description of the Remote sensing data Characteristics Data sets Albedo and above ground carbon estimation Land cover changes Sensor Geo- eye Spot 4 and 5 Spatial resolution 0.5 m 20km Temporal subset 3/11/2010, 3/21/2011 21/06/1987, 21/06/1998, 21/06/2009 Projection WGS84 WGS84
  12. 12. Methods: Estimation of above ground Carbon – Objective 1 Above Ground carbon estimation (Field data) Image Processing •Calculate Above Ground Biomas •Calculate Above ground Stock •Atmospheric corrections •Pansharpening Ready image for analysis Spatial Modelling Image Analysis •Object oriented analysis •Validation Tree Crowns/species • Develop a model – Crown Projection Area(CPA) and AGC •Apply the model to the Image ABOVE GROUND CARBON MAP Above ground Carbon stock (AGC)
  13. 13. Methods: Radiative Forcings of carbon storage (based on Kirschbaum et al 2011) •The change in Radiative Forcing for a square meter of ground RM can be calculated as follows Where C =Background atmospheric carbondioxide concentration ∆C = Change in the atmospheric carbon dioxide concentrations attributed to Land management . 86400= is the number of seconds in a day. 5.35 =Converts units of carbon dioxide to radiative forcing. A change in carbon stock change in the atmosphere needs to be converted to the corresponding concentration
  14. 14. Methods: Radiative Forcings of carbon storage (based on Kirschbaum et al 2011) Considering that 1 ppm in carbon dioxide concentration corresponds to 2.123 GtC: Thus The total radiative forcing over a year and for the Earth surface as a whole can be calculated as 510x10 12m2 = Surface of the Earth, 365= Number of days in a year. With an atmospheric carbon dioxide concentration of 390ppm and for the earth as a whole the earth the Radiative Forcing of removal of I tonne carbon can be calculated as
  15. 15. Methods: Estimation of surface albedo– Objective 2 Image-Rainy season Image Processing •Atmospheric corrections Ready image for analysis Image Analysis •Extraction of surface Albedo using ATCORE software Albedo (Wet season) Image-Dry season Image Processing • Atmospehericcorrections Ready image for analysis Image Analysis •Extraction of surface Albedo using ATCORE software Albedo (Dry seson)
  16. 16. Methods: Radiative Forcings of Surface Albedo (based on Kirschbaum et al 2011) The change in Radiative Forcing due to change in Albedo can be calculated as = Total daily downward solar radiation = Difference in Albedo over the short wave spectrum between two different land management options = The proportion of short wave radiation absorbed by the atmosphere (~20%) The difference in Radiative Forcing for 50 m2 over a year can be calculated as 2500= Number of square metres of the experimental site
  17. 17. Methods: Land cover /Use changes and impact on soil carbon-Objective 4
  18. 18. THANK YOU

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