Atmospheric Deposition of Metals to Forest Vegetation
Atmospheric Deposition of Metals to Forest Vegetation
复制标题
金属对森林植被的大气沉积
DOI：
10.1126/science.215.4540.1609
复制
发表时间：
1982
期刊：
影响因子：
56.9
通讯作者：
R. Turner
中科院分区：
文献类型：
--
作者：
S. Lindberg;R. Harriss;R. Turner
生长季节期间的大气沉积贡献了从森林树冠到田纳西山谷橡树林下土壤的铅、锌和镉估计总通量的三分之一或更多，但不到锰通量的10%。在此期间，干湿沉降通量与植被的比率为：锰为0.1%，铅为0.8%，镉和锌的∼为3~4。在干燥的树叶表面沉积的金属颗粒与随后的酸沉淀之间的相互作用可以导致树叶上的金属浓度比单独在雨中的金属浓度高得多。
Atmospheric deposition during the growing season contributes one-third or more of the estimated total flux of lead, zinc, and cadium from the forest canopy to soils beneath an oak stand in the Tennessee Valley but less than 10 percent of the flux of manganese. The ratio of the wet to dry deposition flux to the vegetation during this period ranges from 0.1 for manganese to 0.8 for lead to ∼ 3 to 4 for cadmium and zinc. Interactions between metal particles deposited on dry leaf surfaces and subsequent acid precipitation can result in metal concentrations on leaves that are considerably higher than those in rain alone.