Canziani Pablo O, Carbajal Benitez Gerardo
Equipo Interdisciplinario para el Estudio de Procesos Atmosféricos en el Cambio Global, PEPACG, Facultad de Ciencias Fisicomatemáticas e Ingeniería, Pontificia Universidad Católica Argentina, C1107AFF Ciudad Autónoma de Buenos Aires, Argentina.
ScientificWorldJournal. 2012;2012:972672. doi: 10.1100/2012/972672. Epub 2012 May 3.
Deforestation/land-use changes are major drivers of regional climate change in central South America, impacting upon Amazonia and Gran Chaco ecoregions. Most experimental and modeling studies have focused on the resulting perturbations within Amazonia. Using the Regional Climate Model PRECIS, driven by ERA-40 reanalysis and ECHAM4 Baseline model for the period 1961-2000 (40-year runs), potential effects of deforestation/land-use changes in these and other neighboring ecoregions are evaluated. Current 2002 and estimated 2030 land-use scenarios are used to assess PRECIS's response during 1960-2000. ERA-40 and ECHAM4 Baseline driven runs yield similar results. Precipitation changes for 2002 and 2030 land-use scenarios, while significant within deforested areas, do not result in significant regional changes. For temperature significant changes are found within deforested areas and beyond, with major temperature enhancements during winter and spring. Given the current climate, primary effects of deforestation/land-use changes remain mostly confined to the tropical latitudes of Gran Chaco, and Amazonia.
森林砍伐/土地利用变化是南美洲中部区域气候变化的主要驱动因素,对亚马逊地区和格兰查科生态区产生影响。大多数实验和模型研究都集中在亚马逊地区由此产生的扰动上。利用由ERA - 40再分析和ECHAM4基线模型驱动的区域气候模型PRECIS,对1961 - 2000年期间(40年运行)这些及其他相邻生态区森林砍伐/土地利用变化的潜在影响进行评估。使用2002年现状和预计2030年土地利用情景来评估PRECIS在1960 - 2000年期间的响应。由ERA - 40和ECHAM4基线驱动的运行产生了相似的结果。2002年和2030年土地利用情景下的降水变化,虽然在森林砍伐地区显著,但并未导致显著的区域变化。对于温度,在森林砍伐地区及以外都发现了显著变化,冬季和春季温度有大幅升高。鉴于当前气候,森林砍伐/土地利用变化的主要影响大多仍局限于格兰查科和亚马逊地区的热带纬度。