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Water-soluble and water-insoluble organic nitrogen in the dry and wet deposition

机译：干湿沉降中的水溶性和水不溶性有机氮

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The simultaneous observation of the water-soluble and water-insoluble nitrogen species in the wet deposition, dry deposition, aerosols, and gas phase was conducted for 1 year at an urban site in Japan to clarify the deposition amount and mechanisms of the organic nitrogen species from the atmosphere. The wet deposition amounts of the water-soluble organic nitrogen (WSON) and water-insoluble organic nitrogen (WION) were 0.331 and 0.081 mgN m(-2) day(-1), respectively, on average, which occupied about 80% and 20% of the organic nitrogen (ON) and about 20% and 5% of the total nitrogen (TN) in the wet deposition, respectively. Organic nitrogen compounds, especially WSON, significantly contributed to the nitrogen deposition through the wet process. The dry deposition amounts of the WSON and WION were 0.042 and 0.050 mgN m(-2) day(-1), respectively, on average, which occupied about 46% and 54% of the ON and about 28% and 33% of the TN in the dry deposition, respectively. Compared to the wet process, organic nitrogen compounds, especially the WION, more significantly contributed to the nitrogen deposition through the dry process. The dry deposition amount of the WSON and WION contributed about 11% and 38% of their total (wet + dry) deposition, respectively. A significant fraction of the WSON deposition was derived from the dry process, but a large portion of the WSON deposition can be explained by the wet process. A larger contribution of the dry process to the atmospheric deposition was found for the WION deposition, although the wet process was an important deposition pathway even for the WION. The wet deposition amount of the WSON was strongly influenced by the WSON concentration in the rainwater, and would be affected by the uptake of the WSON into the rainwater in the upper atmosphere. The wet deposition amount of the WION was strongly affected by the uptake of the WION in the aerosols with diameters larger than 10 mu m (PM>10) in the surface atmosphere. A higher scavenging ratio was found for the WSON than for the WION, which supports these uptake processes. The dry deposition amount of the WSON was affected by the concentration of the gaseous basic WSON, whereas that of the WION was strongly influenced by the WION concentration in the PM>10, which are supported by the measurements of these organic nitrogen species in the aerosols and gas phase and the estimates of their deposition velocities from the resistance model.
机译：在日本的城市地区，对湿沉降，干沉降，气溶胶和气相中的水溶性和水不溶性氮物种进行了同时观测，为期一年，以阐明有机氮物种的沉积量和机理。从大气中。水溶性有机氮（WSON）和水不溶性有机氮（WION）的湿沉降量分别平均为0.331和0.081 mgN m（-2）天（-1），分别占约80％和湿法沉积中分别有20％的有机氮（ON）和总氮（TN）的约20％和5％。有机氮化合物（尤其是WSON）通过湿法工艺显着促进了氮的沉积。 WSON和WION的干沉降量分别平均为0.042和0.050 mgN m（-2）天（-1），分别占ON的46％和54％，以及ON和WION的28％和33％。 TN分别在干法沉积中。与湿法工艺相比，有机氮化合物（尤其是WION）在干法工艺中对氮沉积的贡献更大。 WSON和WION的干沉积量分别占其总（湿+干）沉积的11％和38％。 WSON沉积的很大一部分来自干法工艺，但是WSON沉积的很大一部分可以通过湿法工艺来解释。对于WION沉积来说，干法工艺对大气沉积的贡献更大，尽管湿法甚至对于WION也是重要的沉积途径。 WSON的湿沉降量受雨水中WSON浓度的强烈影响，并且会受到WSON在高层大气中向雨水中的吸收的影响。在表面大气中直径大于10微米（PM> 10）的气溶胶中WION的吸收强烈影响WION的湿沉降量。发现WSON的清除率高于WION，这支持了这些摄取过程。 WSON的干沉降量受气态碱性WSON浓度的影响，而WION的干沉降量受PM> 10中WION浓度的强烈影响，这通过气雾剂中这些有机氮物质的测量得到支持气相和从电阻模型估算沉积速度。

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