由于全球变暖、城市化、荒漠化等一系列问题，地球的健康状况正在下降，这严重威胁着生态安全和社会的可持续发展。当土地无法通过光合作用产生足够的氧气时，其储水能力逐渐丧失，触发"高温-干旱"相互加强的正反馈循环。基于此，文章将地球视为一个生命体，提出了土地癌化的概念及其诊断方法，以量化土地的健康状况。文章还通过构建癌化土地指数(cancer land index，CLI)，发现全球超过一半(53%)的土地面积正面临着癌化的威胁。癌化土地开始于产氧量低的沙漠和干旱区，以及耗氧量高的大城市和工业区，并逐渐向周边地区蔓延。这一过程类似于人体癌细胞扩散，标志着地球健康的恶化。文章通过对土地癌化概念的深入研究和癌化面积的检测，提出针对自然癌化土地和人为癌化土地的相应防治对策和建议，力争在早期发现和阻止土地癌化，保护地球的整体健康。
Land cancer and its control
Earth's health condition is getting worse due to global warming,urbanization,and desertification,significantly threatening the ecological security and the sustainable development of society.The land that cannot produce adequate oxygen through photosynthesis will gradually lose water storage capacity,resulting in positive feedback that warming and drying reinforce each.By regarding the Earth as a living body,we propose the concept of land cancer and develop a method to diagnose its health condition.Also,we constructed the cancer land index(CLI),which indicates that cancerous land accounts for 53%of the global land area.Land cancer starts from deserts and drylands with the lowest oxygen production,and from urban centers and concentrated industries with the highest oxygen consumption,then gradually expands to the surrounding areas.The whole process is analogous to the spread of cancer cell in the human body,manifesting the deterioration of Earth's health.Our study thoroughly investigates the concept of land cancer and detects areas of cancerous lands,which offer mitigation suggestions for natural and anthropogenic cancerous lands.The objective is to strive for early detection of land cancer and prevent its expansion,thereby protecting Earth's health.
land cancercancer land indexland surface feedback mechanismclimate changeecological governance
万方数据
维普
