Measurement of dry deposition to surfaces in deciduous and pine canopies.
Measurement of dry deposition to surfaces in deciduous and pine canopies.
复制标题
落叶树冠和松树冠层表面干燥沉积的测量。
DOI：
10.1016/0269-7491(87)90203-x
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发表时间：
1987
影响因子：
8.9
通讯作者：
J. Dasch
中科院分区：
文献类型：
--
作者：
J. Dasch
干沉降的重要性进行了评估，在周边和内部位置在两个植被冠层。通过从叶片洗涤颗粒直接测量干沉积。环境中的颗粒和气体也收集在两个位置内的檐篷。冠层内部的环境浓度相对于周边浓度下降，由于干沉积清除冠层。对SO 42-和NH 4+的清除作用最小，对HNO 3的清除作用最大。干沉积的所有物种是较高的周边植被和代理表面比内表面，由于较低的浓度和较低的风速在庇护的内部。沉积速度比较以及与其他实验和理论值。
The importance of dry deposition was assessed at perimeter and interior locations in two vegetative canopies. Dry deposition was measured directly by washing particles from leaves. Ambient particles and gases were also collected at both locations within the canopies. Ambient concentrations on the canopy interior were decreased relative to perimeter concentrations due to dry deposition scavenging by the canopy. The least scavenging was found for SO42−and NH4+and the highest scavenging was found for HNO3. Dry deposition of all species was higher to perimeter vegetative and surrogate surfaces than to interior surfaces, due both to the lower concentrations and the lower wind speeds in the sheltered interior. Deposition velocities compared well with other experimental and theoretical values.