Atmospheric inputs

The concern over ecological consequences of the atmospheric input of oxidized and reduced nitrogen centres on soil acidification by the oxidized nitrogen directly, and by the reduced nitrogen following its transformation in the soil into NO/ or due to its uptake by vegetation (Figure 5). ... 

Atmospheric Inputs Associated with Deforestation and Biomass Burning... 

Fig. 10-13. The links between the cycling of C, N, and O2 are indicated. Total primary production is composed of two parts. The production driven by new nutrient input to the euphotic zone is called new production (Dugdale and Goering, 1967). New production is mainly in the form of the upward flux of nitrate from below but river and atmospheric input and nitrogen fixation (Karl et al, 1997) are other possible sources. Other forms of nitrogen such as nitrite, ammonia, and urea may also be important under certain situations. The "new" nitrate is used to produce plankton protoplasm and oxygen according to the RKR equation. Some of the plant material produced is respired in the euphotic zone due to the combined efforts...

Elias, R.W., Hirao, Y. and Patterson, C.C. 1982 The circumvention of the natural hiopurification of calcium along nutrient pathways hy atmospheric inputs of industrial lead. Geochimica et Cosmochimica Acta 46 2561-2580. 

Mesocosms placed in shallow Finnish lakes were used to evaluate changes brought about by extended incubation of biologically treated bleachery effluent from mills that used chloride dioxide. The mesocosms had a volume of ca. 2 m and were constructed of translucent polyethere or black polyethene to simulate dark reactions. The experiments were carried out at ambient temperatures throughout the year, and sum parameters were used to trace the fate of the organically bound chlorine. In view of previous studies on the molecular mass distribution of effluents (Jokela and Salkinoja-Salonen 1992), this was measured as an additional marker. Important featmes were that (a) sedimentation occurred exclusively within the water mass within the mesocosm, (b) the atmospheric input could be estimated... 

The atmospheric input of organically bound halogen was negligible compared with that of the effluent. 

Lee YH, Bishop K, Munthe J. 2000. Do concepts about catchment cycling of methyhnercury and mercury in boreal catchments stand the test of time Six years of atmospheric inputs and runoff export at Svartberget, northern Sweden. Sci Total Environ 260 11-20. 

Atmospheric inputs. The atmosphere can be either a source or sink for select coastal radionuclides for example, for the atmosphere can be a sizeable source, yet for Rn the atmosphere is a sink. 

To illustrate the model a steady state solution is given which would apply to the lake after prolonged steady exposure to water emission of 10 mol/h and atmospheric input from air of 5.3 ng/m3. The solution is given in Figure 2B in the form of fugacities, concentrations and transport and transformation process rates. 

Miller EK, Priedland AJ. 1994. Lead migration in forest soils Response to changing atmospheric inputs. Environ Sci Technol 28 662-669. 

However, Cl content can be influenced by anthropogenic and atmospheric inputs and Na by silicate weathering [4, 10,11, 37, 38] and thus the calculation of TDSeVaP is limited in the Ebro Basin, since the computation of Cl from pollution and Na from silicate weathering cannot be easily estimated while the input from the atmophere can be neglected according to Avila and Alarcon [39]. 

Migon, C. 1993. Riverine and atmospheric inputs of heavy metals to the Ligurian Sea. Sci. Total Environ. 138 289-299. 

Atmospheric transport of atrazine-contaminated aerosol particulates, dusts, and soils may contribute significantly to atrazine burdens of terrestrial and aquatic ecosystems. The annual atmospheric input of atrazine in rainfall to the Rhode River, Maryland, as one example, was estimated at 1016 mg/surface ha in 1977, and 97 mg/ha in 1978 (Wu 1981). A similar situation exists with fog water. When fog forms, exposed plant surfaces become saturated with liquid for the duration of the fog (Glotfelty et al. 1987). 

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