当前，全球气候变化已成为不争的事实，也是国际社会关注的重要问题。IPCC报告指出，近百年来，中国气温上升幅度大于全球平均水平。由于交错带气候的过渡性和特殊性，形成风力侵蚀、水力侵蚀、重力侵蚀等，使得农牧交错带的水土流失、环境恶化、沙尘暴频繁等生态问题逐渐暴露出来，并且在农牧交错带内形成了具有多种侵蚀力共同作用的风水蚀复合区。但目前气候变化对风水蚀复合区的影响研究尚属空白。
气候变暖引起的蒸发加大，风速、大风日数增加，土壤表层水分散失亏损致使农田干旱，荒漠化加速，原本生产水平低下、产量不稳的农业生产面临更大威胁。自然驱动因子将有利于土壤侵蚀的扩大。
中国科学院寒区旱区环境与工程研究所科研人员通过实地考察和对气象资料地分析发现：风水蚀复合区是农牧交错带中较为敏感的区域，有着气候地貌多样化、侵蚀动力多样化、生态问题严重的特点。主要研究结论为，风水蚀复合区随着降水的增加而向大陆内部移动；降水减少，则移动方向相反。全球气候增加2℃、降水不变时，风水蚀复合区范围向东南扩张，北界移动相对较少，并将进一步加剧风水蚀复合区的土壤侵蚀。
本研究成果对后续相关研究奠定了科学的理论基础，对风水蚀复合区的环境治理及农业发展有积极指导意义。
本研究项目受到水利部公益性科研专项（201201047）、国家重点基础研究发展计划项目（2007CB407203）共同资助；研究成果发表于《中国沙漠》。(生物谷Bioon.com)
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The Effect of Climate Change on Wind-water Complex Erosion Region
AN Zhi-shan1, LI Dong-liang2, WANG Tao1, ZHANG Wei-min1, QU Jian-jun1
Abstract： The wind-water complex erosion region is a sensitive part of agro-pasture interlocked zone in northern China, and has significant response to global climate change. The concept and geographical scope of the wind-water complex erosion region have been defined through on-the-spot investigation and meteorological data analysis. In the wind-water complex erosion region, wind and water have combined action, and ecological environment there is vulnerable. Therefore, the diverse weather and erosion forces give rise to soil erosion and desertification, which are serious in the wind-water complex erosion region. It has also developed unique geomorphologic landscape. The boundary of wind-water complex erosion region is influenced by precipitation and it exhibits a characteristic of north-south direction swing. It moves to southeast in dry years, and to northwest in humid years.
