The Study on the Forest Minus Climate of Different Protecting Forest Structures in Sanxia Reservior Zone 三峡库区防护林不同林分结构森林小气候研究
The low pressure system is supported by positive center of vorticity, the minus vorticity area around it and strong gradient zone between both. 低值系统有正涡度中心支持,外围是负涡度区,其间有强涡度梯度带;