Sustainable Land Management for Mitigating Climate Change
Table 2. Atmospheric abundance and radiative forcing of three greenhouse gases (Adapted from WMO, 2007; IPCC, 2007)
- Bu səhifədəki naviqasiya:
- (ppm) CH 4 (ppb) N 2 O (ppb)
|
Parameters |
Atmospheric Concentration | ||
|
CO2 (ppm) |
CH4 (ppb) |
N2O (ppb) | |
|
Atmospheric concentration (2007) |
383 |
1789 |
321 |
|
Increase since 1750 (% |
137 |
256 |
119 |
|
Absolute Increase in 2006-07 |
1.9 |
6 |
0.8 |
|
Relative Increase in 2006-07 (%) |
0.05 |
0.34 |
0.25 |
|
Global Warming Potential (per year) |
1 |
25 |
298 |
VIII. Priority Action Themes and Range of SLM Practices
27. The SLM options and related ecological actions can be prioritized on the basis of principal land uses. These land uses are chosen on the basis of their agronomic/economic significance to advancing food security for the growing population, and also their sensitivity to be affected by and/or affect the projected CC. Therefore, this report focuses on four land uses deemed important to SLM for mitigation of and adaptation to CC. These are: (i) tropical forest ecosystems, (ii) savannas, grasslands and rangelands, (iii) croplands, and (iv) degraded and desertified soils including salinized soils. Relevant SLM options for these three land uses are outlined in Figure 9. The SLM strategy outlined in Figure 9 is part of a farming system approach that presents an innovative way of exploiting the land resources in rural and periurban areas in ways that maintain the integrity of the land while enhancing the livelihood of the producers. The value of SLM options listed in Figure 9 can be enhanced to accentuate both local and global benefits by harnessing their potential to sequester C in soils and biota, and accrue other co-benefits.
28. Priority action strategies listed in Figure 9 are based on the following criteria: (i) wherever possible, avoid deforestation and conversion of other natural ecosystems (e.g., savannahs, cerrado, pampas, llanos, steppes, peatlands) to agricultural land use, (ii) intensify agricultural production on existing crop lands, (iii) increase use efficiency of inputs by enhancing production per unit input of fertilizer, irrigation water and other energy-based components of farming systems, (iv) take marginal lands out of production and convert these to restorative/perennial land use (e.g., tree crops, afforestation), (v) provide incentives to resource-poor farmers in developing countries through payment for ecosystem services rather than subsidies or emergency handouts, and (vi) commodify C sequestered in the soil by developing transparent mechanisms for trading such C credits.
Dostları ilə paylaş:
