利用涡度相关技术对青海湖高寒湿地生态系统不同时间尺度CO2通量和水汽通量间的耦合关系进行了研究。结果显示:不同天气条件下青海湖高寒湿地生态系统30min净CO2交换量(NEE)与水汽通量间均显示了极显著负相关关系(P<0.0001);30 min总生态系统生产力(GEP)与水汽通量呈极显著线性正相关关系(P<0.0001);阴天水汽通量参与生态系统净CO2交换和生态系统总碳吸收的比例最高。月均30
Urban metabolism is a complex system of materials, energy, population and environment, which usually can be measured by the Emergy Synthesis(ES) and the Slacks-Based Measure(SBM) approach. In this pap
Radioactive markers are useful in dating lead(Pb) deposition patterns from industrialization in sedimentary archives. As a well-known natural reserve in the world, Yancheng coastal wetland in Jiangsu
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Due to high intensity agricultural exploitation since the middle of the 20 th century, farmland gullies have become a pervasive form of water erosion in Northeast China. Yet few researches are concent
Flooding is the most prevalent and costly natural disaster in the world and building reservoirs is one of the major structural measures for flood control and management. In this paper, a framework was
China′s economy and transport infrastructure have both experienced rapid development since 1978, and especially since 1990. Today, China is the second-largest economic entity in terms of GDP and has t