Fire-induced albedo change and surface radiative forcing in Sub-Saharan Africa savanna ecosystems: implications for the energy balance

摘要: Surface albedo is a critical parameter that controls surface energy balance. In dryland ecosystems, fires play significant role in decreasing albedo, resulting positive radiative forcing. Here, we investigate the long-term effect of fire on albedo. We devised method to calculate short, medium, and fire-induced forcing their relative effects used MODerate-resolution Imaging Spectroradimeter data our analysis, covering different vegetation classes Sub-Saharan Africa (SSA). Our analysis indicated mean short-term change SSA was -0.022, -0.035 -0.041 for savannas, shrubland grasslands, respectively. At regional scale, savannas -0.018 -0.024 Northern (NSSA) Southern Hemisphere (SHA), The burned areas (SSA) 5.41 W m-2, which contributed continental global 0.25 0.058 impact has long-lasting varies with type. energetic associated were, average, more than 19 times greater across effects, suggesting exerted far previously thought. Taking into account actual duration fire's conclude contribution fires, globally throughout year, ~0.12 m-2. These findings provide crucial information possible climate variability.