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沿海海—气界面化学物质的交换对生物地球化学循环起着十分重要的作用。大气沉降过程（包括干沉降和湿沉降等过程）是化学物质进入沿海区域的重要途径之一。物质平衡估算的结果指出，在某些沿海区域，经由大气输入的若干痕量物质的总量几乎相当于河流的输入量，有的甚至更多。大气沉降作用是一些沿海区域氮化物的重要来源，并与富营养化有紧密关系。目前大气沉降通量的估算还存在着相当大的误差，有待于进一步的发展和完善。
Coastal sea-air interface The exchange of chemical substances plays a very important role in the biogeochemical cycle. Atmospheric deposition process (including dry deposition and wet deposition process) is one of the important ways for chemical substances to enter the coastal area. The results of the material balance estimation point out that in some coastal areas the total amount of some trace substances that are input via the atmosphere is almost equivalent to the input of the river and some even more. Atmospheric deposition is an important source of nitrides in some coastal areas and is closely related to eutrophication. At present, estimation of atmospheric deposition fluxes still has considerable errors and needs to be further developed and perfected.