荒漠化与气候变化的相互作用

对近年来国际社会有关荒漠化和气候变化方面的研究成果的综述表明:气候变化与荒漠化二者的关系和相互作用，无论从何种尺度来看，都仍然是一个尚未全知的复杂灰色系统。荒漠化对气候的影响是通过干扰干旱地区的地-空能量交换平衡机制而产生效力；在对流臭氧层中，来自全球生物量燃烧的气体约占38%，就旱地对全球温室气体的贡献率而言，估计在5%～10%左右，其中旱地退化的贡献率小于5%；温室气体的积累将导致21世纪全球升温1～5℃。

Review on Interaction of Desertification and Climate Change

Research findings and achievements in recent years on both desertification and climate were reviewed and demonstrated that the interaction and feedback between the both have still only partially understand the complex gray system whatever seen as temporal or spatial scale. The overwhelming effect of desertification on climate is reached by perturbing the background surface-atmosphere energy balance and moisture exchanges. Ozone from global biomass burning furnishes 38% of all tropospheric ozone, but the contribution from dryland burning is conservatively estimated to be about 10%, in which degradation of dryland contribute probably below 5%. Proposed increases in greenhouse gas concentration are expected to force global temperatures to rise between 1℃ and 5℃ over the 21st century.