2017
DOI: 10.1002/2016jd026318
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Fire‐induced albedo change and surface radiative forcing in sub‐Saharan Africa savanna ecosystems: Implications for the energy balance

Abstract: Surface albedo is a critical parameter that controls surface energy balance. In dryland ecosystems, fires play a significant role in decreasing surface albedo, resulting in positive radiative forcing. Here we investigate the long‐term effect of fire on surface albedo. We devised a method to calculate short‐, medium‐, and long‐term effect of fire‐induced radiative forcing and their relative effects on energy balance. We used Moderate Resolution Imaging Spectroradiometer (MODIS) data in our analysis, covering di… Show more

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Cited by 39 publications
(44 citation statements)
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“…In North American boreal forests where high-intensity fires remove the canopy and reveal snow cover, albedo increases following fire and results in a negative radiative forcing between À5.0 and À1.3 W m À2 (Huang et al, 2015;Randerson et al, 2006;Rogers et al, 2015). In contrast, in dryland ecosystems such as savannas and grasslands, where frequent high severity fires are prevalent, postfire albedo decreases for as long as several years and causes a positive radiative forcing between 0.1 and 0.54 W m À2 (Dintwe et al, 2017;Gatebe et al, 2014). Such differences in climate feedback between these two boreal regions are related to species traits, fire regimes, and snow climatology (Rogers et al, 2015).…”
Section: Discussionmentioning
confidence: 99%
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“…In North American boreal forests where high-intensity fires remove the canopy and reveal snow cover, albedo increases following fire and results in a negative radiative forcing between À5.0 and À1.3 W m À2 (Huang et al, 2015;Randerson et al, 2006;Rogers et al, 2015). In contrast, in dryland ecosystems such as savannas and grasslands, where frequent high severity fires are prevalent, postfire albedo decreases for as long as several years and causes a positive radiative forcing between 0.1 and 0.54 W m À2 (Dintwe et al, 2017;Gatebe et al, 2014). Such differences in climate feedback between these two boreal regions are related to species traits, fire regimes, and snow climatology (Rogers et al, 2015).…”
Section: Discussionmentioning
confidence: 99%
“…In Siberian boreal forests where lower-intensity surface fires are common, the postfire albedo increase is less dramatic and caused by a relatively weak negative radiative forcing of À0.53 W m À2 ( Figure S9). Despite the relatively small radiative forcing changes due to savanna or grassland fires, their global contribution is important because they contribute the most to global BA and greenhouse gas emissions (Dintwe et al, 2017;van der Werf et al, 2017). In contrast, in dryland ecosystems such as savannas and grasslands, where frequent high severity fires are prevalent, postfire albedo decreases for as long as several years and causes a positive radiative forcing between 0.1 and 0.54 W m À2 (Dintwe et al, 2017;Gatebe et al, 2014).…”
Section: Discussionmentioning
confidence: 99%
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“…Por milhares de anos, o fogo tem sido um importante integrante dos processos biogeoquímicos, influenciando nas interações terra-atmosfera, estando presente em forma de instrumento de manejo em mais de 50% dos ecossistemas terrestres (Liu et al, 2016;Dintwe et al, 2017). Ele pode ser de origem natural, provocado por combustão espontânea ou incidência de raios e impulsionado por fatores como a umidade do ar, precipitação e velocidade do vento, bem como de origem antrópica, podendo gerar grandes incêndios florestais quando ocorre de forma acidental ou até mesmo criminosa (Clemente et al, 2017;Forkel et al, 2017).…”
Section: Introductionunclassified